/* this works around a bug in mingw32 providing a non-working setjmp */
#define USE_NO_MINGW_SETJMP_TWO_ARGS
#define NDEBUG 1 /* perl usually disables NDEBUG later */
#include "libcoro/coro.c"
#define PERL_NO_GET_CONTEXT
#define PERL_EXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "perliol.h"
#include "schmorp.h"
#define ECB_NO_THREADS 1
#define ECB_NO_LIBM 1
#include "ecb.h"
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
#ifndef SvREFCNT_dec_NN
#define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
#endif
#ifndef SvREFCNT_inc_NN
#define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
#endif
#ifndef SVs_PADSTALE
# define SVs_PADSTALE 0
#endif
#ifdef PadARRAY
# define NEWPADAPI 1
# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
#else
typedef AV PADNAMELIST;
# if !PERL_VERSION_ATLEAST(5,8,0)
typedef AV PADLIST;
typedef AV PAD;
# endif
# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
# define PadlistMAX(pl) AvFILLp (pl)
# define PadlistNAMES(pl) (*PadlistARRAY (pl))
# define PadARRAY AvARRAY
# define PadMAX AvFILLp
# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
#endif
#ifndef PadnamelistREFCNT
# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
#endif
#ifndef PadnamelistREFCNT_dec
# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
#endif
/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
#if PERL_VERSION_ATLEAST(5,19,0)
# define SVt_BIND SVt_IV
#endif
#if defined(_WIN32)
# undef HAS_GETTIMEOFDAY
# undef setjmp
# undef longjmp
# undef _exit
# define setjmp _setjmp /* deep magic */
#else
# include <inttypes.h> /* most portable stdint.h */
#endif
/* the maximum number of idle cctx that will be pooled */
static int cctx_max_idle = 4;
#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
# define HAS_SCOPESTACK_NAME 1
#endif
/* prefer perl internal functions over our own? */
#ifndef CORO_PREFER_PERL_FUNCTIONS
# define CORO_PREFER_PERL_FUNCTIONS 0
#endif
/* The next macros try to return the current stack pointer, in an as
* portable way as possible. */
#if __GNUC__ >= 4
# define dSTACKLEVEL int stacklevel_dummy
# define STACKLEVEL __builtin_frame_address (0)
#else
# define dSTACKLEVEL volatile void *stacklevel
# define STACKLEVEL ((void *)&stacklevel)
#endif
#define IN_DESTRUCT PL_dirty
#include "CoroAPI.h"
#define GCoroAPI (&coroapi) /* very sneaky */
#ifdef USE_ITHREADS
# if CORO_PTHREAD
static void *coro_thx;
# endif
#endif
#ifdef __linux
# include <time.h> /* for timespec */
# include <syscall.h> /* for SYS_* */
# ifdef SYS_clock_gettime
# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
# define CORO_CLOCK_MONOTONIC 1
# define CORO_CLOCK_THREAD_CPUTIME_ID 3
# endif
#endif
/* one off bugfix for perl 5.22 */
#if PERL_VERSION_ATLEAST(5,22,0) && !PERL_VERSION_ATLEAST(5,24,0)
# undef PadlistNAMES
# define PadlistNAMES(pl) *((PADNAMELIST **)PadlistARRAY (pl))
#endif
#if PERL_VERSION_ATLEAST(5,24,0)
# define SUB_ARGARRAY PL_curpad[0]
#else
# define SUB_ARGARRAY (SV *)cx->blk_sub.argarray
#endif
/* perl usually suppresses asserts. for debugging, we sometimes force it to be on */
#if 0
# undef NDEBUG
# include <assert.h>
#endif
static double (*nvtime)(); /* so why doesn't it take void? */
static void (*u2time)(pTHX_ UV ret[2]);
/* we hijack an hopefully unused CV flag for our purposes */
#define CVf_SLF 0x4000
static OP *pp_slf (pTHX);
static void slf_destroy (pTHX_ struct coro *coro);
static U32 cctx_gen;
static size_t cctx_stacksize = CORO_STACKSIZE;
static struct CoroAPI coroapi;
static AV *main_mainstack; /* used to differentiate between $main and others */
static JMPENV *main_top_env;
static HV *coro_state_stash, *coro_stash;
static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
static AV *av_destroy; /* destruction queue */
static SV *sv_manager; /* the manager coro */
static SV *sv_idle; /* $Coro::idle */
static GV *irsgv; /* $/ */
static GV *stdoutgv; /* *STDOUT */
static SV *rv_diehook;
static SV *rv_warnhook;
/* async_pool helper stuff */
static SV *sv_pool_rss;
static SV *sv_pool_size;
static SV *sv_async_pool_idle; /* description string */
static AV *av_async_pool; /* idle pool */
static SV *sv_Coro; /* class string */
static CV *cv_pool_handler;
/* Coro::AnyEvent */
static SV *sv_activity;
/* enable processtime/realtime profiling */
static char enable_times;
typedef U32 coro_ts[2];
static coro_ts time_real, time_cpu;
static char times_valid;
static struct coro_cctx *cctx_first;
static int cctx_count, cctx_idle;
enum
{
CC_MAPPED = 0x01,
CC_NOREUSE = 0x02, /* throw this away after tracing */
CC_TRACE = 0x04,
CC_TRACE_SUB = 0x08, /* trace sub calls */
CC_TRACE_LINE = 0x10, /* trace each statement */
CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
};
/* this is a structure representing a c-level coroutine */
typedef struct coro_cctx
{
struct coro_cctx *next;
/* the stack */
struct coro_stack stack;
/* cpu state */
void *idle_sp; /* sp of top-level transfer/schedule/cede call */
#ifndef NDEBUG
JMPENV *idle_te; /* same as idle_sp, but for top_env */
#endif
JMPENV *top_env;
coro_context cctx;
U32 gen;
#if CORO_USE_VALGRIND
int valgrind_id;
#endif
unsigned char flags;
} coro_cctx;
static coro_cctx *cctx_current; /* the currently running cctx */
/*****************************************************************************/
static MGVTBL coro_state_vtbl;
enum
{
CF_RUNNING = 0x0001, /* coroutine is running */
CF_READY = 0x0002, /* coroutine is ready */
CF_NEW = 0x0004, /* has never been switched to */
CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
};
/* the structure where most of the perl state is stored, overlaid on the cxstack */
typedef struct
{
#define VARx(name,expr,type) type name;
#include "state.h"
} perl_slots;
/* how many context stack entries do we need for perl_slots */
#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
/* this is a structure representing a perl-level coroutine */
struct coro
{
/* the C coroutine allocated to this perl coroutine, if any */
coro_cctx *cctx;
/* ready queue */
struct coro *next_ready;
/* state data */
struct CoroSLF slf_frame; /* saved slf frame */
AV *mainstack;
perl_slots *slot; /* basically the saved sp */
CV *startcv; /* the CV to execute */
AV *args; /* data associated with this coroutine (initial args) */
int flags; /* CF_ flags */
HV *hv; /* the perl hash associated with this coro, if any */
/* statistics */
int usecount; /* number of transfers to this coro */
/* coro process data */
int prio;
SV *except; /* exception to be thrown */
SV *rouse_cb; /* last rouse callback */
AV *on_destroy; /* callbacks or coros to notify on destroy */
AV *status; /* the exit status list */
/* async_pool */
SV *saved_deffh;
SV *invoke_cb;
AV *invoke_av;
/* on_enter/on_leave */
AV *on_enter; AV *on_enter_xs;
AV *on_leave; AV *on_leave_xs;
/* swap_sv */
AV *swap_sv;
/* times */
coro_ts t_cpu, t_real;
/* linked list */
struct coro *next, *prev;
};
typedef struct coro *Coro__State;
typedef struct coro *Coro__State_or_hashref;
/* the following variables are effectively part of the perl context */
/* and get copied between struct coro and these variables */
/* the main reason we don't support windows process emulation */
static struct CoroSLF slf_frame; /* the current slf frame */
/** Coro ********************************************************************/
#define CORO_PRIO_MAX 3
#define CORO_PRIO_HIGH 1
#define CORO_PRIO_NORMAL 0
#define CORO_PRIO_LOW -1
#define CORO_PRIO_IDLE -3
#define CORO_PRIO_MIN -4
/* for Coro.pm */
static SV *coro_current;
static SV *coro_readyhook;
static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
static CV *cv_coro_run;
static struct coro *coro_first;
#define coro_nready coroapi.nready
/** JIT *********************************************************************/
#if CORO_JIT
/* APPLE doesn't have mmap though */
#define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
#ifndef CORO_JIT_TYPE
#if ECB_AMD64 && CORO_JIT_UNIXY
#define CORO_JIT_TYPE "amd64-unix"
#elif __i386 && CORO_JIT_UNIXY
#define CORO_JIT_TYPE "x86-unix"
#endif
#endif
#endif
#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
#undef CORO_JIT
#endif
#if CORO_JIT
typedef void (*load_save_perl_slots_type)(perl_slots *);
static load_save_perl_slots_type load_perl_slots, save_perl_slots;
#endif
/** Coro::Select ************************************************************/
static OP *(*coro_old_pp_sselect) (pTHX);
static SV *coro_select_select;
/* horrible hack, but if it works... */
static OP *
coro_pp_sselect (pTHX)
{
dSP;
PUSHMARK (SP - 4); /* fake argument list */
XPUSHs (coro_select_select);
PUTBACK;
/* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
PL_op->op_flags |= OPf_STACKED;
PL_op->op_private = 0;
return PL_ppaddr [OP_ENTERSUB](aTHX);
}
/** time stuff **************************************************************/
#ifdef HAS_GETTIMEOFDAY
ecb_inline void
coro_u2time (pTHX_ UV ret[2])
{
struct timeval tv;
gettimeofday (&tv, 0);
ret [0] = tv.tv_sec;
ret [1] = tv.tv_usec;
}
ecb_inline double
coro_nvtime (void)
{
struct timeval tv;
gettimeofday (&tv, 0);
return tv.tv_sec + tv.tv_usec * 1e-6;
}
ecb_inline void
time_init (pTHX)
{
nvtime = coro_nvtime;
u2time = coro_u2time;
}
#else
ecb_inline void
time_init (pTHX)
{
SV **svp;
require_pv ("Time/HiRes.pm");
svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
if (!svp) croak ("Time::HiRes is required, but missing. Caught");
if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
nvtime = INT2PTR (double (*)(), SvIV (*svp));
svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
}
#endif
/** lowlevel stuff **********************************************************/
static SV * ecb_noinline
coro_get_sv (pTHX_ const char *name, int create)
{
#if PERL_VERSION_ATLEAST (5,10,0)
/* silence stupid and wrong 5.10 warning that I am unable to switch off */
get_sv (name, create);
#endif
return get_sv (name, create);
}
static AV * ecb_noinline
coro_get_av (pTHX_ const char *name, int create)
{
#if PERL_VERSION_ATLEAST (5,10,0)
/* silence stupid and wrong 5.10 warning that I am unable to switch off */
get_av (name, create);
#endif
return get_av (name, create);
}
static HV * ecb_noinline
coro_get_hv (pTHX_ const char *name, int create)
{
#if PERL_VERSION_ATLEAST (5,10,0)
/* silence stupid and wrong 5.10 warning that I am unable to switch off */
get_hv (name, create);
#endif
return get_hv (name, create);
}
ecb_inline void
coro_times_update (void)
{
#ifdef coro_clock_gettime
struct timespec ts;
ts.tv_sec = ts.tv_nsec = 0;
coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
ts.tv_sec = ts.tv_nsec = 0;
coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
#else
dTHX;
UV tv[2];
u2time (aTHX_ tv);
time_real [0] = tv [0];
time_real [1] = tv [1] * 1000;
#endif
}
ecb_inline void
coro_times_add (struct coro *c)
{
c->t_real [1] += time_real [1];
if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
c->t_real [0] += time_real [0];
c->t_cpu [1] += time_cpu [1];
if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
c->t_cpu [0] += time_cpu [0];
}
ecb_inline void
coro_times_sub (struct coro *c)
{
if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
c->t_real [1] -= time_real [1];
c->t_real [0] -= time_real [0];
if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
c->t_cpu [1] -= time_cpu [1];
c->t_cpu [0] -= time_cpu [0];
}
/*****************************************************************************/
/* magic glue */
#define CORO_MAGIC_type_cv 26
#define CORO_MAGIC_type_state PERL_MAGIC_ext
#define CORO_MAGIC_NN(sv, type) \
(ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
? SvMAGIC (sv) \
: mg_find (sv, type))
#define CORO_MAGIC(sv, type) \
(ecb_expect_true (SvMAGIC (sv)) \
? CORO_MAGIC_NN (sv, type) \
: 0)
#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
ecb_inline MAGIC *
SvSTATEhv_p (pTHX_ SV *coro)
{
MAGIC *mg;
if (ecb_expect_true (
SvTYPE (coro) == SVt_PVHV
&& (mg = CORO_MAGIC_state (coro))
&& mg->mg_virtual == &coro_state_vtbl
))
return mg;
return 0;
}
ecb_inline struct coro *
SvSTATE_ (pTHX_ SV *coro_sv)
{
MAGIC *mg;
if (SvROK (coro_sv))
coro_sv = SvRV (coro_sv);
mg = SvSTATEhv_p (aTHX_ coro_sv);
if (!mg)
croak ("Coro::State object required");
return (struct coro *)mg->mg_ptr;
}
#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
/* faster than SvSTATE, but expects a coroutine hv */
#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
/*****************************************************************************/
/* padlist management and caching */
ecb_inline PADLIST *
coro_derive_padlist (pTHX_ CV *cv)
{
PADLIST *padlist = CvPADLIST (cv);
PADLIST *newpadlist;
PADNAMELIST *padnames;
PAD *newpad;
PADOFFSET off = PadlistMAX (padlist) + 1;
#if NEWPADAPI
/* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
/* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
while (!PadlistARRAY (padlist)[off - 1])
--off;
Perl_pad_push (aTHX_ padlist, off);
newpad = PadlistARRAY (padlist)[off];
PadlistARRAY (padlist)[off] = 0;
#else
#if PERL_VERSION_ATLEAST (5,10,0)
Perl_pad_push (aTHX_ padlist, off);
#else
Perl_pad_push (aTHX_ padlist, off, 1);
#endif
newpad = PadlistARRAY (padlist)[off];
PadlistMAX (padlist) = off - 1;
#endif
newPADLIST (newpadlist);
#if !PERL_VERSION_ATLEAST(5,15,3)
/* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
AvREAL_off (newpadlist);
#endif
/* Already extended to 2 elements by newPADLIST. */
PadlistMAX (newpadlist) = 1;
padnames = PadlistNAMES (padlist);
++PadnamelistREFCNT (padnames);
PadlistNAMES (newpadlist) = padnames;
PadlistARRAY (newpadlist)[1] = newpad;
return newpadlist;
}
ecb_inline void
free_padlist (pTHX_ PADLIST *padlist)
{
/* may be during global destruction */
if (!IN_DESTRUCT)
{
I32 i = PadlistMAX (padlist);
while (i > 0) /* special-case index 0 */
{
/* we try to be extra-careful here */
PAD *pad = PadlistARRAY (padlist)[i--];
if (pad)
{
I32 j = PadMAX (pad);
while (j >= 0)
SvREFCNT_dec (PadARRAY (pad)[j--]);
PadMAX (pad) = -1;
SvREFCNT_dec (pad);
}
}
PadnamelistREFCNT_dec (PadlistNAMES (padlist));
#if NEWPADAPI
Safefree (PadlistARRAY (padlist));
Safefree (padlist);
#else
AvFILLp (padlist) = -1;
AvREAL_off (padlist);
SvREFCNT_dec ((SV*)padlist);
#endif
}
}
static int
coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
{
PADLIST *padlist;
PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
size_t len = *(size_t *)mg->mg_ptr;
/* perl manages to free our internal AV and _then_ call us */
if (IN_DESTRUCT)
return 0;
while (len--)
free_padlist (aTHX_ padlists[len]);
return 0;
}
static MGVTBL coro_cv_vtbl = {
0, 0, 0, 0,
coro_cv_free
};
/* the next two functions merely cache the padlists */
ecb_inline void
get_padlist (pTHX_ CV *cv)
{
MAGIC *mg = CORO_MAGIC_cv (cv);
size_t *lenp;
if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
else
{
#if CORO_PREFER_PERL_FUNCTIONS
/* this is probably cleaner? but also slower! */
/* in practise, it seems to be less stable */
CV *cp = Perl_cv_clone (aTHX_ cv);
CvPADLIST (cv) = CvPADLIST (cp);
CvPADLIST (cp) = 0;
SvREFCNT_dec (cp);
#else
CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
#endif
}
}
ecb_inline void
put_padlist (pTHX_ CV *cv)
{
MAGIC *mg = CORO_MAGIC_cv (cv);
if (ecb_expect_false (!mg))
{
mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
mg->mg_len = 1; /* so mg_free frees mg_ptr */
}
else
Renew (mg->mg_ptr,
sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
char);
((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
}
/** load & save, init *******************************************************/
ecb_inline void
swap_sv (SV *a, SV *b)
{
const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
SV tmp;
/* swap sv_any */
SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
/* swap sv_flags */
SvFLAGS (&tmp) = SvFLAGS (a);
SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
#if PERL_VERSION_ATLEAST (5,10,0)
/* perl 5.10 and later complicates this _quite_ a bit, but it also
* is much faster, so no quarrels here. alternatively, we could
* sv_upgrade to avoid this.
*/
{
/* swap sv_u */
tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
/* if SvANY points to the head, we need to adjust the pointers,
* as the pointer for a still points to b, and maybe vice versa.
*/
U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
#if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
svany_in_head_set |= 1 << SVt_NV;
#endif
#define svany_in_head(type) (svany_in_head_set & (1 << (type)))
if (svany_in_head (SvTYPE (a)))
SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
if (svany_in_head (SvTYPE (b)))
SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
}
#endif
}
/* swap sv heads, at least logically */
static void
swap_svs_enter (pTHX_ Coro__State c)
{
int i;
for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
}
static void
swap_svs_leave (pTHX_ Coro__State c)
{
int i;
for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
}
#define SWAP_SVS_ENTER(coro) \
if (ecb_expect_false ((coro)->swap_sv)) \
swap_svs_enter (aTHX_ (coro))
#define SWAP_SVS_LEAVE(coro) \
if (ecb_expect_false ((coro)->swap_sv)) \
swap_svs_leave (aTHX_ (coro))
static void
on_enterleave_call (pTHX_ SV *cb);
static void
load_perl (pTHX_ Coro__State c)
{
perl_slots *slot = c->slot;
c->slot = 0;
PL_mainstack = c->mainstack;
#if CORO_JIT
load_perl_slots (slot);
#else
#define VARx(name,expr,type) expr = slot->name;
#include "state.h"
#endif
{
dSP;
CV *cv;
/* now do the ugly restore mess */
while (ecb_expect_true (cv = (CV *)POPs))
{
put_padlist (aTHX_ cv); /* mark this padlist as available */
CvDEPTH (cv) = PTR2IV (POPs);
CvPADLIST (cv) = (PADLIST *)POPs;
}
PUTBACK;
}
slf_frame = c->slf_frame;
CORO_THROW = c->except;
if (ecb_expect_false (enable_times))
{
if (ecb_expect_false (!times_valid))
coro_times_update ();
coro_times_sub (c);
}
if (ecb_expect_false (c->on_enter))
{
int i;
for (i = 0; i <= AvFILLp (c->on_enter); ++i)
on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
}
if (ecb_expect_false (c->on_enter_xs))
{
int i;
for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
}
SWAP_SVS_ENTER (c);
}
static void
save_perl (pTHX_ Coro__State c)
{
SWAP_SVS_LEAVE (c);
if (ecb_expect_false (c->on_leave_xs))
{
int i;
for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
}
if (ecb_expect_false (c->on_leave))
{
int i;
for (i = AvFILLp (c->on_leave); i >= 0; --i)
on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
}
times_valid = 0;
if (ecb_expect_false (enable_times))
{
coro_times_update (); times_valid = 1;
coro_times_add (c);
}
c->except = CORO_THROW;
c->slf_frame = slf_frame;
{
dSP;
I32 cxix = cxstack_ix;
PERL_CONTEXT *ccstk = cxstack;
PERL_SI *top_si = PL_curstackinfo;
/*
* the worst thing you can imagine happens first - we have to save
* (and reinitialize) all cv's in the whole callchain :(
*/
XPUSHs (Nullsv);
/* this loop was inspired by pp_caller */
for (;;)
{
while (ecb_expect_true (cxix >= 0))
{
PERL_CONTEXT *cx = &ccstk[cxix--];
if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
{
CV *cv = cx->blk_sub.cv;
if (ecb_expect_true (CvDEPTH (cv)))
{
EXTEND (SP, 3);
PUSHs ((SV *)CvPADLIST (cv));
PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
PUSHs ((SV *)cv);
CvDEPTH (cv) = 0;
get_padlist (aTHX_ cv);
}
}
}
if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
break;
top_si = top_si->si_prev;
ccstk = top_si->si_cxstack;
cxix = top_si->si_cxix;
}
PUTBACK;
}
/* allocate some space on the context stack for our purposes */
if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
{
unsigned int i;
for (i = 0; i < SLOT_COUNT; ++i)
CXINC;
cxstack_ix -= SLOT_COUNT; /* undo allocation */
}
c->mainstack = PL_mainstack;
{
perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
#if CORO_JIT
save_perl_slots (slot);
#else
#define VARx(name,expr,type) slot->name = expr;
#include "state.h"
#endif
}
}
/*
* allocate various perl stacks. This is almost an exact copy
* of perl.c:init_stacks, except that it uses less memory
* on the (sometimes correct) assumption that coroutines do
* not usually need a lot of stackspace.
*/
#if CORO_PREFER_PERL_FUNCTIONS
# define coro_init_stacks(thx) init_stacks ()
#else
static void
coro_init_stacks (pTHX)
{
PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
PL_curstackinfo->si_type = PERLSI_MAIN;
PL_curstack = PL_curstackinfo->si_stack;
PL_mainstack = PL_curstack; /* remember in case we switch stacks */
PL_stack_base = AvARRAY(PL_curstack);
PL_stack_sp = PL_stack_base;
PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
New(50,PL_tmps_stack,32,SV*);
PL_tmps_floor = -1;
PL_tmps_ix = -1;
PL_tmps_max = 32;
New(54,PL_markstack,16,I32);
PL_markstack_ptr = PL_markstack;
PL_markstack_max = PL_markstack + 16;
#ifdef SET_MARK_OFFSET
SET_MARK_OFFSET;
#endif
New(54,PL_scopestack,8,I32);
PL_scopestack_ix = 0;
PL_scopestack_max = 8;
#if HAS_SCOPESTACK_NAME
New(54,PL_scopestack_name,8,const char*);
#endif
New(54,PL_savestack,24,ANY);
PL_savestack_ix = 0;
PL_savestack_max = 24;
#if PERL_VERSION_ATLEAST (5,24,0)
/* perl 5.24 moves SS_MAXPUSH optimisation from */
/* the header macros to PL_savestack_max */
PL_savestack_max -= SS_MAXPUSH;
#endif
#if !PERL_VERSION_ATLEAST (5,10,0)
New(54,PL_retstack,4,OP*);
PL_retstack_ix = 0;
PL_retstack_max = 4;
#endif
}
#endif
/*
* destroy the stacks, the callchain etc...
*/
static void
coro_destruct_stacks (pTHX)
{
while (PL_curstackinfo->si_next)
PL_curstackinfo = PL_curstackinfo->si_next;
while (PL_curstackinfo)
{
PERL_SI *p = PL_curstackinfo->si_prev;
if (!IN_DESTRUCT)
SvREFCNT_dec (PL_curstackinfo->si_stack);
Safefree (PL_curstackinfo->si_cxstack);
Safefree (PL_curstackinfo);
PL_curstackinfo = p;
}
Safefree (PL_tmps_stack);
Safefree (PL_markstack);
Safefree (PL_scopestack);
#if HAS_SCOPESTACK_NAME
Safefree (PL_scopestack_name);
#endif
Safefree (PL_savestack);
#if !PERL_VERSION_ATLEAST (5,10,0)
Safefree (PL_retstack);
#endif
}
#define CORO_RSS \
rss += sizeof (SYM (curstackinfo)); \
rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
rss += SYM (tmps_max) * sizeof (SV *); \
rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
rss += SYM (scopestack_max) * sizeof (I32); \
rss += SYM (savestack_max) * sizeof (ANY);
static size_t
coro_rss (pTHX_ struct coro *coro)
{
size_t rss = sizeof (*coro);
if (coro->mainstack)
{
if (coro->flags & CF_RUNNING)
{
#define SYM(sym) PL_ ## sym
CORO_RSS;
#undef SYM
}
else
{
#define SYM(sym) coro->slot->sym
CORO_RSS;
#undef SYM
}
}
return rss;
}
/** provide custom get/set/clear methods for %SIG elements ******************/
/* apparently < 5.8.8 */
#ifndef MgPV_nolen_const
#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
SvPV_nolen((SV*)((mg)->mg_ptr)) : \
(const char*)(mg)->mg_ptr)
#endif
/* this will be a patched copy of PL_vtbl_sigelem */
static MGVTBL coro_sigelem_vtbl;
static int ecb_cold
coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
{
char *key = SvPV_nolen ((SV *)name);
/* do what mg_copy normally does */
sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
/* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
if (*key == '_'
&& (strEQ (key, "__DIE__")
|| strEQ (key, "__WARN__")))
mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
return 1;
}
/* perl does not have a %SIG vtbl, we provide one so we can override */
/* the magic vtbl for the __DIE__ and __WARN__ members */
static const MGVTBL coro_sig_vtbl = {
0, 0, 0, 0, 0,
coro_sig_copy
};
/*
* This overrides the default magic get method of %SIG elements.
* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
* and instead of trying to save and restore the hash elements (extremely slow),
* we just provide our own readback here.
*/
static int ecb_cold
coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
{
const char *s = MgPV_nolen_const (mg);
/* the key must be either __DIE__ or __WARN__ here */
SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
SV *ssv;
if (!*svp)
ssv = &PL_sv_undef;
else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
ssv = sv_2mortal (newRV_inc (*svp));
else
ssv = *svp;
sv_setsv (sv, ssv);
return 0;
}
static int ecb_cold
coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
{
const char *s = MgPV_nolen_const (mg);
/* the key must be either __DIE__ or __WARN__ here */
SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
SV *old = *svp;
*svp = 0;
SvREFCNT_dec (old);
return 0;
}
static int ecb_cold
coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
{
const char *s = MgPV_nolen_const (mg);
/* the key must be either __DIE__ or __WARN__ here */
SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
SV *old = *svp;
*svp = SvOK (sv) ? newSVsv (sv) : 0;
SvREFCNT_dec (old);
return 0;
}
static void
prepare_nop (pTHX_ struct coro_transfer_args *ta)
{
/* kind of mega-hacky, but works */
ta->next = ta->prev = (struct coro *)ta;
}
static int
slf_check_nop (pTHX_ struct CoroSLF *frame)
{
return 0;
}
static int
slf_check_repeat (pTHX_ struct CoroSLF *frame)
{
return 1;
}
/** coroutine stack handling ************************************************/
static UNOP init_perl_op;
ecb_noinline static void /* noinline to keep it out of the transfer fast path */
init_perl (pTHX_ struct coro *coro)
{
/*
* emulate part of the perl startup here.
*/
coro_init_stacks (aTHX);
PL_runops = RUNOPS_DEFAULT;
PL_curcop = &PL_compiling;
PL_in_eval = EVAL_NULL;
PL_comppad = 0;
PL_comppad_name = 0;
PL_comppad_name_fill = 0;
PL_comppad_name_floor = 0;
PL_curpm = 0;
PL_curpad = 0;
PL_localizing = 0;
PL_restartop = 0;
#if PERL_VERSION_ATLEAST (5,10,0)
PL_parser = 0;
#endif
PL_hints = 0;
/* recreate the die/warn hooks */
PL_diehook = SvREFCNT_inc (rv_diehook);
PL_warnhook = SvREFCNT_inc (rv_warnhook);
GvSV (PL_defgv) = newSV (0);
GvAV (PL_defgv) = coro->args; coro->args = 0;
GvSV (PL_errgv) = newSV (0);
GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
GvHV (PL_hintgv) = newHV ();
#if PERL_VERSION_ATLEAST (5,10,0)
hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
#endif
PL_rs = newSVsv (GvSV (irsgv));
PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
{
dSP;
UNOP myop;
Zero (&myop, 1, UNOP);
myop.op_next = Nullop;
myop.op_type = OP_ENTERSUB;
myop.op_flags = OPf_WANT_VOID;
PUSHMARK (SP);
PUSHs ((SV *)coro->startcv);
PUTBACK;
PL_op = (OP *)&myop;
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
}
/* this newly created coroutine might be run on an existing cctx which most
* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
*/
slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
slf_frame.destroy = 0;
/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
init_perl_op.op_next = PL_op;
init_perl_op.op_type = OP_ENTERSUB;
init_perl_op.op_ppaddr = pp_slf;
/* no flags etc. required, as an init function won't be called */
PL_op = (OP *)&init_perl_op;
/* copy throw, in case it was set before init_perl */
CORO_THROW = coro->except;
SWAP_SVS_ENTER (coro);
if (ecb_expect_false (enable_times))
{
coro_times_update ();
coro_times_sub (coro);
}
}
static void
coro_unwind_stacks (pTHX)
{
if (!IN_DESTRUCT)
{
/* restore all saved variables and stuff */
LEAVE_SCOPE (0);
assert (PL_tmps_floor == -1);
/* free all temporaries */
FREETMPS;
assert (PL_tmps_ix == -1);
/* unwind all extra stacks */
POPSTACK_TO (PL_mainstack);
/* unwind main stack */
dounwind (-1);
}
}
static void
destroy_perl (pTHX_ struct coro *coro)
{
SV *svf [9];
{
SV *old_current = SvRV (coro_current);
struct coro *current = SvSTATE (old_current);
assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
save_perl (aTHX_ current);
/* this will cause transfer_check to croak on block*/
SvRV_set (coro_current, (SV *)coro->hv);
load_perl (aTHX_ coro);
/* restore swapped sv's */
SWAP_SVS_LEAVE (coro);
coro_unwind_stacks (aTHX);
coro_destruct_stacks (aTHX);
/* now save some sv's to be free'd later */
svf [0] = GvSV (PL_defgv);
svf [1] = (SV *)GvAV (PL_defgv);
svf [2] = GvSV (PL_errgv);
svf [3] = (SV *)PL_defoutgv;
svf [4] = PL_rs;
svf [5] = GvSV (irsgv);
svf [6] = (SV *)GvHV (PL_hintgv);
svf [7] = PL_diehook;
svf [8] = PL_warnhook;
assert (9 == sizeof (svf) / sizeof (*svf));
SvRV_set (coro_current, old_current);
load_perl (aTHX_ current);
}
{
unsigned int i;
for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
SvREFCNT_dec (svf [i]);
SvREFCNT_dec (coro->saved_deffh);
SvREFCNT_dec (coro->rouse_cb);
SvREFCNT_dec (coro->invoke_cb);
SvREFCNT_dec (coro->invoke_av);
SvREFCNT_dec (coro->on_enter_xs);
SvREFCNT_dec (coro->on_leave_xs);
}
}
ecb_inline void
free_coro_mortal (pTHX)
{
if (ecb_expect_true (coro_mortal))
{
SvREFCNT_dec ((SV *)coro_mortal);
coro_mortal = 0;
}
}
static int
runops_trace (pTHX)
{
COP *oldcop = 0;
int oldcxix = -2;
while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
{
PERL_ASYNC_CHECK ();
if (cctx_current->flags & CC_TRACE_ALL)
{
if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
{
PERL_CONTEXT *cx = &cxstack[cxstack_ix];
SV **bot, **top;
AV *av = newAV (); /* return values */
SV **cb;
dSP;
GV *gv = CvGV (cx->blk_sub.cv);
SV *fullname = sv_2mortal (newSV (0));
if (isGV (gv))
gv_efullname3 (fullname, gv, 0);
bot = PL_stack_base + cx->blk_oldsp + 1;
top = cx->blk_gimme == G_ARRAY ? SP + 1
: cx->blk_gimme == G_SCALAR ? bot + 1
: bot;
av_extend (av, top - bot);
while (bot < top)
av_push (av, SvREFCNT_inc_NN (*bot++));
PL_runops = RUNOPS_DEFAULT;
ENTER;
SAVETMPS;
EXTEND (SP, 3);
PUSHMARK (SP);
PUSHs (&PL_sv_no);
PUSHs (fullname);
PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
PUTBACK;
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
SPAGAIN;
FREETMPS;
LEAVE;
PL_runops = runops_trace;
}
if (oldcop != PL_curcop)
{
oldcop = PL_curcop;
if (PL_curcop != &PL_compiling)
{
SV **cb;
if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
{
PERL_CONTEXT *cx = &cxstack[cxstack_ix];
if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
{
dSP;
GV *gv = CvGV (cx->blk_sub.cv);
SV *fullname = sv_2mortal (newSV (0));
if (isGV (gv))
gv_efullname3 (fullname, gv, 0);
PL_runops = RUNOPS_DEFAULT;
ENTER;
SAVETMPS;
EXTEND (SP, 3);
PUSHMARK (SP);
PUSHs (&PL_sv_yes);
PUSHs (fullname);
PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc (SUB_ARGARRAY)) : &PL_sv_undef);
PUTBACK;
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
SPAGAIN;
FREETMPS;
LEAVE;
PL_runops = runops_trace;
}
oldcxix = cxstack_ix;
}
if (cctx_current->flags & CC_TRACE_LINE)
{
dSP;
PL_runops = RUNOPS_DEFAULT;
ENTER;
SAVETMPS;
EXTEND (SP, 3);
PL_runops = RUNOPS_DEFAULT;
PUSHMARK (SP);
PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
PUTBACK;
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
SPAGAIN;
FREETMPS;
LEAVE;
PL_runops = runops_trace;
}
}
}
}
}
TAINT_NOT;
return 0;
}
static struct CoroSLF cctx_ssl_frame;
static void
slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
{
ta->prev = 0;
}
static int
slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
{
*frame = cctx_ssl_frame;
return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
}
/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
static void ecb_noinline
cctx_prepare (pTHX)
{
PL_top_env = &PL_start_env;
if (cctx_current->flags & CC_TRACE)
PL_runops = runops_trace;
/* we already must be executing an SLF op, there is no other valid way
* that can lead to creation of a new cctx */
assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
cctx_ssl_frame = slf_frame;
slf_frame.prepare = slf_prepare_set_stacklevel;
slf_frame.check = slf_check_set_stacklevel;
}
/* the tail of transfer: execute stuff we can only do after a transfer */
ecb_inline void
transfer_tail (pTHX)
{
free_coro_mortal (aTHX);
}
/* try to exit the same way perl's main function would do */
/* we do not bother resetting the environment or other things *7
/* that are not, uhm, essential */
/* this obviously also doesn't work when perl is embedded */
static void ecb_noinline ecb_cold
perlish_exit (pTHX)
{
int exitstatus = perl_destruct (PL_curinterp);
perl_free (PL_curinterp);
exit (exitstatus);
}
/*
* this is a _very_ stripped down perl interpreter ;)
*/
static void
cctx_run (void *arg)
{
#ifdef USE_ITHREADS
# if CORO_PTHREAD
PERL_SET_CONTEXT (coro_thx);
# endif
#endif
{
dTHX;
/* normally we would need to skip the entersub here */
/* not doing so will re-execute it, which is exactly what we want */
/* PL_nop = PL_nop->op_next */
/* inject a fake subroutine call to cctx_init */
cctx_prepare (aTHX);
/* cctx_run is the alternative tail of transfer() */
transfer_tail (aTHX);
/* somebody or something will hit me for both perl_run and PL_restartop */
PL_restartop = PL_op;
perl_run (PL_curinterp);
/*
* Unfortunately, there is no way to get at the return values of the
* coro body here, as perl_run destroys these. Likewise, we cannot catch
* runtime errors here, as this is just a random interpreter, not a thread.
*/
/*
* pp_entersub in 5.24 no longer ENTERs, but perl_destruct
* requires PL_scopestack_ix, so do it here if required.
*/
if (!PL_scopestack_ix)
ENTER;
/*
* If perl-run returns we assume exit() was being called or the coro
* fell off the end, which seems to be the only valid (non-bug)
* reason for perl_run to return. We try to mimic whatever perl is normally
* doing in that case. YMMV.
*/
perlish_exit (aTHX);
}
}
static coro_cctx *
cctx_new (void)
{
coro_cctx *cctx;
++cctx_count;
New (0, cctx, 1, coro_cctx);
cctx->gen = cctx_gen;
cctx->flags = 0;
cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
return cctx;
}
/* create a new cctx only suitable as source */
static coro_cctx *
cctx_new_empty (void)
{
coro_cctx *cctx = cctx_new ();
cctx->stack.sptr = 0;
coro_create (&cctx->cctx, 0, 0, 0, 0);
return cctx;
}
/* create a new cctx suitable as destination/running a perl interpreter */
static coro_cctx *
cctx_new_run (void)
{
coro_cctx *cctx = cctx_new ();
if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
{
perror ("FATAL: unable to allocate stack for coroutine, exiting.");
_exit (EXIT_FAILURE);
}
coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
return cctx;
}
static void
cctx_destroy (coro_cctx *cctx)
{
if (!cctx)
return;
assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
--cctx_count;
coro_destroy (&cctx->cctx);
coro_stack_free (&cctx->stack);
Safefree (cctx);
}
/* wether this cctx should be destructed */
#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
static coro_cctx *
cctx_get (pTHX)
{
while (ecb_expect_true (cctx_first))
{
coro_cctx *cctx = cctx_first;
cctx_first = cctx->next;
--cctx_idle;
if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
return cctx;
cctx_destroy (cctx);
}
return cctx_new_run ();
}
static void
cctx_put (coro_cctx *cctx)
{
assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
/* free another cctx if overlimit */
if (ecb_expect_false (cctx_idle >= cctx_max_idle))
{
coro_cctx *first = cctx_first;
cctx_first = first->next;
--cctx_idle;
cctx_destroy (first);
}
++cctx_idle;
cctx->next = cctx_first;
cctx_first = cctx;
}
/** coroutine switching *****************************************************/
static void
transfer_check (pTHX_ struct coro *prev, struct coro *next)
{
/* TODO: throwing up here is considered harmful */
if (ecb_expect_true (prev != next))
{
if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
#if !PERL_VERSION_ATLEAST (5,10,0)
if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
#endif
}
}
/* always use the TRANSFER macro */
static void ecb_noinline /* noinline so we have a fixed stackframe */
transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
{
dSTACKLEVEL;
/* sometimes transfer is only called to set idle_sp */
if (ecb_expect_false (!prev))
{
cctx_current->idle_sp = STACKLEVEL;
assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
}
else if (ecb_expect_true (prev != next))
{
coro_cctx *cctx_prev;
if (ecb_expect_false (prev->flags & CF_NEW))
{
/* create a new empty/source context */
prev->flags &= ~CF_NEW;
prev->flags |= CF_RUNNING;
}
prev->flags &= ~CF_RUNNING;
next->flags |= CF_RUNNING;
/* first get rid of the old state */
save_perl (aTHX_ prev);
if (ecb_expect_false (next->flags & CF_NEW))
{
/* need to start coroutine */
next->flags &= ~CF_NEW;
/* setup coroutine call */
init_perl (aTHX_ next);
}
else
load_perl (aTHX_ next);
/* possibly untie and reuse the cctx */
if (ecb_expect_true (
cctx_current->idle_sp == STACKLEVEL
&& !(cctx_current->flags & CC_TRACE)
&& !force_cctx
))
{
/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
/* without this the next cctx_get might destroy the running cctx while still in use */
if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
if (ecb_expect_true (!next->cctx))
next->cctx = cctx_get (aTHX);
cctx_put (cctx_current);
}
else
prev->cctx = cctx_current;
++next->usecount;
cctx_prev = cctx_current;
cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
next->cctx = 0;
if (ecb_expect_false (cctx_prev != cctx_current))
{
cctx_prev->top_env = PL_top_env;
PL_top_env = cctx_current->top_env;
coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
}
transfer_tail (aTHX);
}
}
#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
/** high level stuff ********************************************************/
/* this function is actually Coro, not Coro::State, but we call it from here */
/* because it is convenient - but it hasn't been declared yet for that reason */
static void
coro_call_on_destroy (pTHX_ struct coro *coro);
static void
coro_state_destroy (pTHX_ struct coro *coro)
{
if (coro->flags & CF_ZOMBIE)
return;
slf_destroy (aTHX_ coro);
coro->flags |= CF_ZOMBIE;
if (coro->flags & CF_READY)
{
/* reduce nready, as destroying a ready coro effectively unreadies it */
/* alternative: look through all ready queues and remove the coro */
--coro_nready;
}
else
coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
if (coro->next) coro->next->prev = coro->prev;
if (coro->prev) coro->prev->next = coro->next;
if (coro == coro_first) coro_first = coro->next;
if (coro->mainstack
&& coro->mainstack != main_mainstack
&& coro->slot
&& !PL_dirty)
destroy_perl (aTHX_ coro);
cctx_destroy (coro->cctx);
SvREFCNT_dec (coro->startcv);
SvREFCNT_dec (coro->args);
SvREFCNT_dec (coro->swap_sv);
SvREFCNT_dec (CORO_THROW);
coro_call_on_destroy (aTHX_ coro);
/* more destruction mayhem in coro_state_free */
}
static int
coro_state_free (pTHX_ SV *sv, MAGIC *mg)
{
struct coro *coro = (struct coro *)mg->mg_ptr;
mg->mg_ptr = 0;
coro_state_destroy (aTHX_ coro);
SvREFCNT_dec (coro->on_destroy);
SvREFCNT_dec (coro->status);
Safefree (coro);
return 0;
}
static int ecb_cold
coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
{
/* called when perl clones the current process the slow way (windows process emulation) */
/* WE SIMply nuke the pointers in the copy, causing perl to croak */
mg->mg_ptr = 0;
mg->mg_virtual = 0;
return 0;
}
static MGVTBL coro_state_vtbl = {
0, 0, 0, 0,
coro_state_free,
0,
#ifdef MGf_DUP
coro_state_dup,
#else
# define MGf_DUP 0
#endif
};
static void
prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
{
ta->prev = SvSTATE (prev_sv);
ta->next = SvSTATE (next_sv);
TRANSFER_CHECK (*ta);
}
static void
api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
{
struct coro_transfer_args ta;
prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
TRANSFER (ta, 1);
}
/** Coro ********************************************************************/
ecb_inline void
coro_enq (pTHX_ struct coro *coro)
{
struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
SvREFCNT_inc_NN (coro->hv);
coro->next_ready = 0;
*(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
ready [1] = coro;
}
ecb_inline struct coro *
coro_deq (pTHX)
{
int prio;
for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
{
struct coro **ready = coro_ready [prio];
if (ready [0])
{
struct coro *coro = ready [0];
ready [0] = coro->next_ready;
return coro;
}
}
return 0;
}
static void
invoke_sv_ready_hook_helper (void)
{
dTHX;
dSP;
ENTER;
SAVETMPS;
PUSHMARK (SP);
PUTBACK;
call_sv (coro_readyhook, G_VOID | G_DISCARD);
FREETMPS;
LEAVE;
}
static int
api_ready (pTHX_ SV *coro_sv)
{
struct coro *coro = SvSTATE (coro_sv);
if (coro->flags & CF_READY)
return 0;
coro->flags |= CF_READY;
coro_enq (aTHX_ coro);
if (!coro_nready++)
if (coroapi.readyhook)
coroapi.readyhook ();
return 1;
}
static int
api_is_ready (pTHX_ SV *coro_sv)
{
return !!(SvSTATE (coro_sv)->flags & CF_READY);
}
/* expects to own a reference to next->hv */
ecb_inline void
prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
{
SV *prev_sv = SvRV (coro_current);
ta->prev = SvSTATE_hv (prev_sv);
ta->next = next;
TRANSFER_CHECK (*ta);
SvRV_set (coro_current, (SV *)next->hv);
free_coro_mortal (aTHX);
coro_mortal = prev_sv;
}
static void
prepare_schedule (pTHX_ struct coro_transfer_args *ta)
{
for (;;)
{
struct coro *next = coro_deq (aTHX);
if (ecb_expect_true (next))
{
/* cannot transfer to destroyed coros, skip and look for next */
if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
else
{
next->flags &= ~CF_READY;
--coro_nready;
prepare_schedule_to (aTHX_ ta, next);
break;
}
}
else
{
/* nothing to schedule: call the idle handler */
if (SvROK (sv_idle)
&& SvOBJECT (SvRV (sv_idle)))
{
if (SvRV (sv_idle) == SvRV (coro_current))
{
require_pv ("Carp");
{
dSP;
ENTER;
SAVETMPS;
PUSHMARK (SP);
XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
PUTBACK;
call_pv ("Carp::confess", G_VOID | G_DISCARD);
FREETMPS;
LEAVE;
}
}
++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
api_ready (aTHX_ SvRV (sv_idle));
--coro_nready;
}
else
{
/* TODO: deprecated, remove, cannot work reliably *//*D*/
dSP;
ENTER;
SAVETMPS;
PUSHMARK (SP);
PUTBACK;
call_sv (sv_idle, G_VOID | G_DISCARD);
FREETMPS;
LEAVE;
}
}
}
}
ecb_inline void
prepare_cede (pTHX_ struct coro_transfer_args *ta)
{
api_ready (aTHX_ coro_current);
prepare_schedule (aTHX_ ta);
}
ecb_inline void
prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
{
SV *prev = SvRV (coro_current);
if (coro_nready)
{
prepare_schedule (aTHX_ ta);
api_ready (aTHX_ prev);
}
else
prepare_nop (aTHX_ ta);
}
static void
api_schedule (pTHX)
{
struct coro_transfer_args ta;
prepare_schedule (aTHX_ &ta);
TRANSFER (ta, 1);
}
static void
api_schedule_to (pTHX_ SV *coro_sv)
{
struct coro_transfer_args ta;
struct coro *next = SvSTATE (coro_sv);
SvREFCNT_inc_NN (coro_sv);
prepare_schedule_to (aTHX_ &ta, next);
}
static int
api_cede (pTHX)
{
struct coro_transfer_args ta;
prepare_cede (aTHX_ &ta);
if (ecb_expect_true (ta.prev != ta.next))
{
TRANSFER (ta, 1);
return 1;
}
else
return 0;
}
static int
api_cede_notself (pTHX)
{
if (coro_nready)
{
struct coro_transfer_args ta;
prepare_cede_notself (aTHX_ &ta);
TRANSFER (ta, 1);
return 1;
}
else
return 0;
}
static void
api_trace (pTHX_ SV *coro_sv, int flags)
{
struct coro *coro = SvSTATE (coro_sv);
if (coro->flags & CF_RUNNING)
croak ("cannot enable tracing on a running coroutine, caught");
if (flags & CC_TRACE)
{
if (!coro->cctx)
coro->cctx = cctx_new_run ();
else if (!(coro->cctx->flags & CC_TRACE))
croak ("cannot enable tracing on coroutine with custom stack, caught");
coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
}
else if (coro->cctx && coro->cctx->flags & CC_TRACE)
{
coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
if (coro->flags & CF_RUNNING)
PL_runops = RUNOPS_DEFAULT;
else
coro->slot->runops = RUNOPS_DEFAULT;
}
}
static void
coro_push_av (pTHX_ AV *av, I32 gimme_v)
{
if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
{
dSP;
if (gimme_v == G_SCALAR)
XPUSHs (AvARRAY (av)[AvFILLp (av)]);
else
{
int i;
EXTEND (SP, AvFILLp (av) + 1);
for (i = 0; i <= AvFILLp (av); ++i)
PUSHs (AvARRAY (av)[i]);
}
PUTBACK;
}
}
static void
coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
{
if (!coro->on_destroy)
coro->on_destroy = newAV ();
av_push (coro->on_destroy, cb);
}
static void
slf_destroy_join (pTHX_ struct CoroSLF *frame)
{
SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
}
static int
slf_check_join (pTHX_ struct CoroSLF *frame)
{
struct coro *coro = (struct coro *)frame->data;
if (!coro->status)
return 1;
frame->destroy = 0;
coro_push_av (aTHX_ coro->status, GIMME_V);
SvREFCNT_dec ((SV *)coro->hv);
return 0;
}
static void
slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
if (items > 1)
croak ("join called with too many arguments");
if (coro->status)
frame->prepare = prepare_nop;
else
{
coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
frame->prepare = prepare_schedule;
}
frame->check = slf_check_join;
frame->destroy = slf_destroy_join;
frame->data = (void *)coro;
SvREFCNT_inc (coro->hv);
}
static void
coro_call_on_destroy (pTHX_ struct coro *coro)
{
AV *od = coro->on_destroy;
if (!od)
return;
coro->on_destroy = 0;
sv_2mortal ((SV *)od);
while (AvFILLp (od) >= 0)
{
SV *cb = sv_2mortal (av_pop (od));
/* coro hv's (and only hv's at the moment) are supported as well */
if (SvSTATEhv_p (aTHX_ cb))
api_ready (aTHX_ cb);
else
{
dSP; /* don't disturb outer sp */
PUSHMARK (SP);
if (coro->status)
{
PUTBACK;
coro_push_av (aTHX_ coro->status, G_ARRAY);
SPAGAIN;
}
PUTBACK;
call_sv (cb, G_VOID | G_DISCARD);
}
}
}
static void
coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
{
AV *av;
if (coro->status)
{
av = coro->status;
av_clear (av);
}
else
av = coro->status = newAV ();
/* items are actually not so common, so optimise for this case */
if (items)
{
int i;
av_extend (av, items - 1);
for (i = 0; i < items; ++i)
av_push (av, SvREFCNT_inc_NN (arg [i]));
}
}
static void
slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
{
av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
api_ready (aTHX_ sv_manager);
frame->prepare = prepare_schedule;
frame->check = slf_check_repeat;
/* as a minor optimisation, we could unwind all stacks here */
/* but that puts extra pressure on pp_slf, and is not worth much */
/*coro_unwind_stacks (aTHX);*/
}
static void
slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
HV *coro_hv = (HV *)SvRV (coro_current);
coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
}
static void
slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
HV *coro_hv;
struct coro *coro;
if (items <= 0)
croak ("Coro::cancel called without coro object,");
coro = SvSTATE (arg [0]);
coro_hv = coro->hv;
coro_set_status (aTHX_ coro, arg + 1, items - 1);
if (ecb_expect_false (coro->flags & CF_NOCANCEL))
{
/* coro currently busy cancelling something, so just notify it */
coro->slf_frame.data = (void *)coro;
frame->prepare = prepare_nop;
frame->check = slf_check_nop;
}
else if (coro_hv == (HV *)SvRV (coro_current))
{
/* cancelling the current coro is allowed, and equals terminate */
slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
}
else
{
struct coro *self = SvSTATE_current;
if (!self)
croak ("Coro::cancel called outside of thread content,");
/* otherwise we cancel directly, purely for speed reasons
* unfortunately, this requires some magic trickery, as
* somebody else could cancel us, so we have to fight the cancellation.
* this is ugly, and hopefully fully worth the extra speed.
* besides, I can't get the slow-but-safe version working...
*/
slf_frame.data = 0;
self->flags |= CF_NOCANCEL;
coro_state_destroy (aTHX_ coro);
self->flags &= ~CF_NOCANCEL;
if (slf_frame.data)
{
/* while we were busy we have been cancelled, so terminate */
slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
}
else
{
frame->prepare = prepare_nop;
frame->check = slf_check_nop;
}
}
}
static int
slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
{
frame->prepare = 0;
coro_unwind_stacks (aTHX);
slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
return 1;
}
static int
safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
{
if (coro->cctx)
croak ("coro inside C callback, unable to cancel at this time, caught");
if (coro->flags & CF_NEW)
{
coro_set_status (aTHX_ coro, arg, items);
coro_state_destroy (aTHX_ coro);
}
else
{
if (!coro->slf_frame.prepare)
croak ("coro outside an SLF function, unable to cancel at this time, caught");
slf_destroy (aTHX_ coro);
coro_set_status (aTHX_ coro, arg, items);
coro->slf_frame.prepare = prepare_nop;
coro->slf_frame.check = slf_check_safe_cancel;
api_ready (aTHX_ (SV *)coro->hv);
}
return 1;
}
/*****************************************************************************/
/* async pool handler */
static int
slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
{
HV *hv = (HV *)SvRV (coro_current);
struct coro *coro = (struct coro *)frame->data;
if (!coro->invoke_cb)
return 1; /* loop till we have invoke */
else
{
hv_store (hv, "desc", sizeof ("desc") - 1,
newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
{
dSP;
XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
PUTBACK;
}
SvREFCNT_dec (GvAV (PL_defgv));
GvAV (PL_defgv) = coro->invoke_av;
coro->invoke_av = 0;
return 0;
}
}
static void
slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
HV *hv = (HV *)SvRV (coro_current);
struct coro *coro = SvSTATE_hv ((SV *)hv);
if (ecb_expect_true (coro->saved_deffh))
{
/* subsequent iteration */
SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
coro->saved_deffh = 0;
if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
{
slf_init_terminate_cancel_common (aTHX_ frame, hv);
return;
}
else
{
av_clear (GvAV (PL_defgv));
hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
if (ecb_expect_false (coro->swap_sv))
{
SWAP_SVS_LEAVE (coro);
SvREFCNT_dec_NN (coro->swap_sv);
coro->swap_sv = 0;
}
coro->prio = 0;
if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
api_trace (aTHX_ coro_current, 0);
frame->prepare = prepare_schedule;
av_push (av_async_pool, SvREFCNT_inc (hv));
}
}
else
{
/* first iteration, simply fall through */
frame->prepare = prepare_nop;
}
frame->check = slf_check_pool_handler;
frame->data = (void *)coro;
}
/*****************************************************************************/
/* rouse callback */
#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
static void
coro_rouse_callback (pTHX_ CV *cv)
{
dXSARGS;
SV *data = (SV *)S_GENSUB_ARG;
if (SvTYPE (SvRV (data)) != SVt_PVAV)
{
/* first call, set args */
SV *coro = SvRV (data);
AV *av = newAV ();
SvRV_set (data, (SV *)av);
/* better take a full copy of the arguments */
while (items--)
av_store (av, items, newSVsv (ST (items)));
api_ready (aTHX_ coro);
SvREFCNT_dec (coro);
}
XSRETURN_EMPTY;
}
static int
slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
{
SV *data = (SV *)frame->data;
if (CORO_THROW)
return 0;
if (SvTYPE (SvRV (data)) != SVt_PVAV)
return 1;
/* now push all results on the stack */
{
dSP;
AV *av = (AV *)SvRV (data);
int i;
EXTEND (SP, AvFILLp (av) + 1);
for (i = 0; i <= AvFILLp (av); ++i)
PUSHs (sv_2mortal (AvARRAY (av)[i]));
/* we have stolen the elements, so set length to zero and free */
AvFILLp (av) = -1;
av_undef (av);
PUTBACK;
}
return 0;
}
static void
slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
SV *cb;
if (items)
cb = arg [0];
else
{
struct coro *coro = SvSTATE_current;
if (!coro->rouse_cb)
croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
cb = sv_2mortal (coro->rouse_cb);
coro->rouse_cb = 0;
}
if (!SvROK (cb)
|| SvTYPE (SvRV (cb)) != SVt_PVCV
|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
croak ("Coro::rouse_wait called with illegal callback argument,");
{
CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
SV *data = (SV *)S_GENSUB_ARG;
frame->data = (void *)data;
frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
frame->check = slf_check_rouse_wait;
}
}
static SV *
coro_new_rouse_cb (pTHX)
{
HV *hv = (HV *)SvRV (coro_current);
struct coro *coro = SvSTATE_hv (hv);
SV *data = newRV_inc ((SV *)hv);
SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
SvREFCNT_dec (data); /* magicext increases the refcount */
SvREFCNT_dec (coro->rouse_cb);
coro->rouse_cb = SvREFCNT_inc_NN (cb);
return cb;
}
/*****************************************************************************/
/* schedule-like-function opcode (SLF) */
static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
static const CV *slf_cv;
static SV **slf_argv;
static int slf_argc, slf_arga; /* count, allocated */
static I32 slf_ax; /* top of stack, for restore */
/* this restores the stack in the case we patched the entersub, to */
/* recreate the stack frame as perl will on following calls */
/* since entersub cleared the stack */
static OP *
pp_restore (pTHX)
{
int i;
SV **SP = PL_stack_base + slf_ax;
PUSHMARK (SP);
EXTEND (SP, slf_argc + 1);
for (i = 0; i < slf_argc; ++i)
PUSHs (sv_2mortal (slf_argv [i]));
PUSHs ((SV *)CvGV (slf_cv));
RETURNOP (slf_restore.op_first);
}
static void
slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
{
SV **arg = (SV **)slf_frame.data;
prepare_transfer (aTHX_ ta, arg [0], arg [1]);
}
static void
slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
if (items != 2)
croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
frame->prepare = slf_prepare_transfer;
frame->check = slf_check_nop;
frame->data = (void *)arg; /* let's hope it will stay valid */
}
static void
slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
frame->prepare = prepare_schedule;
frame->check = slf_check_nop;
}
static void
slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
{
struct coro *next = (struct coro *)slf_frame.data;
SvREFCNT_inc_NN (next->hv);
prepare_schedule_to (aTHX_ ta, next);
}
static void
slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
if (!items)
croak ("Coro::schedule_to expects a coroutine argument, caught");
frame->data = (void *)SvSTATE (arg [0]);
frame->prepare = slf_prepare_schedule_to;
frame->check = slf_check_nop;
}
static void
slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
api_ready (aTHX_ SvRV (coro_current));
slf_init_schedule_to (aTHX_ frame, cv, arg, items);
}
static void
slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
frame->prepare = prepare_cede;
frame->check = slf_check_nop;
}
static void
slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
frame->prepare = prepare_cede_notself;
frame->check = slf_check_nop;
}
/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
static void
slf_destroy (pTHX_ struct coro *coro)
{
struct CoroSLF frame = coro->slf_frame;
/*
* The on_destroy below most likely is from an SLF call.
* Since by definition the SLF call will not finish when we destroy
* the coro, we will have to force-finish it here, otherwise
* cleanup functions cannot call SLF functions.
*/
coro->slf_frame.prepare = 0;
/* this callback is reserved for slf functions needing to do cleanup */
if (frame.destroy && frame.prepare && !PL_dirty)
frame.destroy (aTHX_ &frame);
}
/*
* these not obviously related functions are all rolled into one
* function to increase chances that they all will call transfer with the same
* stack offset
* SLF stands for "schedule-like-function".
*/
static OP *
pp_slf (pTHX)
{
I32 checkmark; /* mark SP to see how many elements check has pushed */
/* set up the slf frame, unless it has already been set-up */
/* the latter happens when a new coro has been started */
/* or when a new cctx was attached to an existing coroutine */
if (ecb_expect_true (!slf_frame.prepare))
{
/* first iteration */
dSP;
SV **arg = PL_stack_base + TOPMARK + 1;
int items = SP - arg; /* args without function object */
SV *gv = *sp;
/* do a quick consistency check on the "function" object, and if it isn't */
/* for us, divert to the real entersub */
if (SvTYPE (gv) != SVt_PVGV
|| !GvCV (gv)
|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
return PL_ppaddr[OP_ENTERSUB](aTHX);
if (!(PL_op->op_flags & OPf_STACKED))
{
/* ampersand-form of call, use @_ instead of stack */
AV *av = GvAV (PL_defgv);
arg = AvARRAY (av);
items = AvFILLp (av) + 1;
}
/* now call the init function, which needs to set up slf_frame */
((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
(aTHX_ &slf_frame, GvCV (gv), arg, items);
/* pop args */
SP = PL_stack_base + POPMARK;
PUTBACK;
}
/* now that we have a slf_frame, interpret it! */
/* we use a callback system not to make the code needlessly */
/* complicated, but so we can run multiple perl coros from one cctx */
do
{
struct coro_transfer_args ta;
slf_frame.prepare (aTHX_ &ta);
TRANSFER (ta, 0);
checkmark = PL_stack_sp - PL_stack_base;
}
while (slf_frame.check (aTHX_ &slf_frame));
slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
/* exception handling */
if (ecb_expect_false (CORO_THROW))
{
SV *exception = sv_2mortal (CORO_THROW);
CORO_THROW = 0;
sv_setsv (ERRSV, exception);
croak (0);
}
/* return value handling - mostly like entersub */
/* make sure we put something on the stack in scalar context */
if (GIMME_V == G_SCALAR
&& ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
{
dSP;
SV **bot = PL_stack_base + checkmark;
if (sp == bot) /* too few, push undef */
bot [1] = &PL_sv_undef;
else /* too many, take last one */
bot [1] = *sp;
SP = bot + 1;
PUTBACK;
}
return NORMAL;
}
static void
api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
{
int i;
SV **arg = PL_stack_base + ax;
int items = PL_stack_sp - arg + 1;
assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
&& PL_op->op_ppaddr != pp_slf)
croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
CvFLAGS (cv) |= CVf_SLF;
CvXSUBANY (cv).any_ptr = (void *)init_cb;
slf_cv = cv;
/* we patch the op, and then re-run the whole call */
/* we have to put the same argument on the stack for this to work */
/* and this will be done by pp_restore */
slf_restore.op_next = (OP *)&slf_restore;
slf_restore.op_type = OP_CUSTOM;
slf_restore.op_ppaddr = pp_restore;
slf_restore.op_first = PL_op;
slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
if (PL_op->op_flags & OPf_STACKED)
{
if (items > slf_arga)
{
slf_arga = items;
Safefree (slf_argv);
New (0, slf_argv, slf_arga, SV *);
}
slf_argc = items;
for (i = 0; i < items; ++i)
slf_argv [i] = SvREFCNT_inc (arg [i]);
}
else
slf_argc = 0;
PL_op->op_ppaddr = pp_slf;
/*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
PL_op = (OP *)&slf_restore;
}
/*****************************************************************************/
/* dynamic wind */
static void
on_enterleave_call (pTHX_ SV *cb)
{
dSP;
PUSHSTACK;
PUSHMARK (SP);
PUTBACK;
call_sv (cb, G_VOID | G_DISCARD);
SPAGAIN;
POPSTACK;
}
static SV *
coro_avp_pop_and_free (pTHX_ AV **avp)
{
AV *av = *avp;
SV *res = av_pop (av);
if (AvFILLp (av) < 0)
{
*avp = 0;
SvREFCNT_dec (av);
}
return res;
}
static void
coro_pop_on_enter (pTHX_ void *coro)
{
SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
SvREFCNT_dec (cb);
}
static void
coro_pop_on_leave (pTHX_ void *coro)
{
SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
on_enterleave_call (aTHX_ sv_2mortal (cb));
}
static void
enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
{
if (!hook)
return;
if (!*avp)
{
*avp = newAV ();
AvREAL_off (*avp);
}
av_push (*avp, (SV *)hook);
av_push (*avp, (SV *)arg);
}
static void
enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
{
AV *av = *avp;
int i;
if (!av)
return;
for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
if (AvARRAY (av)[i] == (SV *)hook)
{
if (execute)
hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
av_pop (av);
av_pop (av);
break;
}
if (AvFILLp (av) >= 0)
{
*avp = 0;
SvREFCNT_dec_NN (av);
}
}
static void
api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
{
struct coro *coro = SvSTATE (coro_sv);
if (SvSTATE_current == coro)
if (enter)
enter (aTHX_ enter_arg);
enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
}
static void
api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
{
struct coro *coro = SvSTATE (coro_sv);
enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
}
static void
savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
{
struct coro *coro = SvSTATE_current;
enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
}
static void
savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
{
struct coro *coro = SvSTATE_current;
enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
}
static void
api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
{
api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
/* this ought to be much cheaper than malloc + a single destructor call */
if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
}
/*****************************************************************************/
/* PerlIO::cede */
typedef struct
{
PerlIOBuf base;
NV next, every;
} PerlIOCede;
static IV ecb_cold
PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
self->next = nvtime () + self->every;
return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
}
static SV * ecb_cold
PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
{
PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
return newSVnv (self->every);
}
static IV
PerlIOCede_flush (pTHX_ PerlIO *f)
{
PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
double now = nvtime ();
if (now >= self->next)
{
api_cede (aTHX);
self->next = now + self->every;
}
return PerlIOBuf_flush (aTHX_ f);
}
static PerlIO_funcs PerlIO_cede =
{
sizeof(PerlIO_funcs),
"cede",
sizeof(PerlIOCede),
PERLIO_K_DESTRUCT | PERLIO_K_RAW,
PerlIOCede_pushed,
PerlIOBuf_popped,
PerlIOBuf_open,
PerlIOBase_binmode,
PerlIOCede_getarg,
PerlIOBase_fileno,
PerlIOBuf_dup,
PerlIOBuf_read,
PerlIOBuf_unread,
PerlIOBuf_write,
PerlIOBuf_seek,
PerlIOBuf_tell,
PerlIOBuf_close,
PerlIOCede_flush,
PerlIOBuf_fill,
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
PerlIOBuf_get_base,
PerlIOBuf_bufsiz,
PerlIOBuf_get_ptr,
PerlIOBuf_get_cnt,
PerlIOBuf_set_ptrcnt,
};
/*****************************************************************************/
/* Coro::Semaphore & Coro::Signal */
static SV *
coro_waitarray_new (pTHX_ int count)
{
/* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
AV *av = newAV ();
SV **ary;
/* unfortunately, building manually saves memory */
Newx (ary, 2, SV *);
AvALLOC (av) = ary;
#if PERL_VERSION_ATLEAST (5,10,0)
AvARRAY (av) = ary;
#else
/* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
/* -DDEBUGGING flags this as a bug, despite it perfectly working */
SvPVX ((SV *)av) = (char *)ary;
#endif
AvMAX (av) = 1;
AvFILLp (av) = 0;
ary [0] = newSViv (count);
return newRV_noinc ((SV *)av);
}
/* semaphore */
static void
coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
{
SV *count_sv = AvARRAY (av)[0];
IV count = SvIVX (count_sv);
count += adjust;
SvIVX (count_sv) = count;
/* now wake up as many waiters as are expected to lock */
while (count > 0 && AvFILLp (av) > 0)
{
SV *cb;
/* swap first two elements so we can shift a waiter */
AvARRAY (av)[0] = AvARRAY (av)[1];
AvARRAY (av)[1] = count_sv;
cb = av_shift (av);
if (SvOBJECT (cb))
{
api_ready (aTHX_ cb);
--count;
}
else if (SvTYPE (cb) == SVt_PVCV)
{
dSP;
PUSHMARK (SP);
XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
PUTBACK;
call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
}
SvREFCNT_dec_NN (cb);
}
}
static void
coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
{
/* call $sem->adjust (0) to possibly wake up some other waiters */
coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
}
static int
slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
{
AV *av = (AV *)frame->data;
SV *count_sv = AvARRAY (av)[0];
SV *coro_hv = SvRV (coro_current);
frame->destroy = 0;
/* if we are about to throw, don't actually acquire the lock, just throw */
if (ecb_expect_false (CORO_THROW))
{
/* we still might be responsible for the semaphore, so wake up others */
coro_semaphore_adjust (aTHX_ av, 0);
return 0;
}
else if (SvIVX (count_sv) > 0)
{
if (acquire)
SvIVX (count_sv) = SvIVX (count_sv) - 1;
else
coro_semaphore_adjust (aTHX_ av, 0);
return 0;
}
else
{
int i;
/* if we were woken up but can't down, we look through the whole */
/* waiters list and only add us if we aren't in there already */
/* this avoids some degenerate memory usage cases */
for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
if (AvARRAY (av)[i] == coro_hv)
return 1;
av_push (av, SvREFCNT_inc (coro_hv));
return 1;
}
}
static int
slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
{
return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
}
static int
slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
{
return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
}
static void
slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
AV *av = (AV *)SvRV (arg [0]);
if (SvIVX (AvARRAY (av)[0]) > 0)
{
frame->data = (void *)av;
frame->prepare = prepare_nop;
}
else
{
av_push (av, SvREFCNT_inc (SvRV (coro_current)));
frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
frame->prepare = prepare_schedule;
/* to avoid race conditions when a woken-up coro gets terminated */
/* we arrange for a temporary on_destroy that calls adjust (0) */
frame->destroy = coro_semaphore_destroy;
}
}
static void
slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
frame->check = slf_check_semaphore_down;
}
static void
slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
if (items >= 2)
{
/* callback form */
AV *av = (AV *)SvRV (arg [0]);
SV *cb_cv = s_get_cv_croak (arg [1]);
av_push (av, SvREFCNT_inc_NN (cb_cv));
if (SvIVX (AvARRAY (av)[0]) > 0)
coro_semaphore_adjust (aTHX_ av, 0);
frame->prepare = prepare_nop;
frame->check = slf_check_nop;
}
else
{
slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
frame->check = slf_check_semaphore_wait;
}
}
/* signal */
static void
coro_signal_wake (pTHX_ AV *av, int count)
{
SvIVX (AvARRAY (av)[0]) = 0;
/* now signal count waiters */
while (count > 0 && AvFILLp (av) > 0)
{
SV *cb;
/* swap first two elements so we can shift a waiter */
cb = AvARRAY (av)[0];
AvARRAY (av)[0] = AvARRAY (av)[1];
AvARRAY (av)[1] = cb;
cb = av_shift (av);
if (SvTYPE (cb) == SVt_PVCV)
{
dSP;
PUSHMARK (SP);
XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
PUTBACK;
call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
}
else
{
api_ready (aTHX_ cb);
sv_setiv (cb, 0); /* signal waiter */
}
SvREFCNT_dec_NN (cb);
--count;
}
}
static int
slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
{
/* if we are about to throw, also stop waiting */
return SvROK ((SV *)frame->data) && !CORO_THROW;
}
static void
slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
AV *av = (AV *)SvRV (arg [0]);
if (items >= 2)
{
SV *cb_cv = s_get_cv_croak (arg [1]);
av_push (av, SvREFCNT_inc_NN (cb_cv));
if (SvIVX (AvARRAY (av)[0]))
coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
frame->prepare = prepare_nop;
frame->check = slf_check_nop;
}
else if (SvIVX (AvARRAY (av)[0]))
{
SvIVX (AvARRAY (av)[0]) = 0;
frame->prepare = prepare_nop;
frame->check = slf_check_nop;
}
else
{
SV *waiter = newSVsv (coro_current); /* owned by signal av */
av_push (av, waiter);
frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
frame->prepare = prepare_schedule;
frame->check = slf_check_signal_wait;
}
}
/*****************************************************************************/
/* Coro::AIO */
#define CORO_MAGIC_type_aio PERL_MAGIC_ext
/* helper storage struct */
struct io_state
{
int errorno;
I32 laststype; /* U16 in 5.10.0 */
int laststatval;
Stat_t statcache;
};
static void
coro_aio_callback (pTHX_ CV *cv)
{
dXSARGS;
AV *state = (AV *)S_GENSUB_ARG;
SV *coro = av_pop (state);
SV *data_sv = newSV (sizeof (struct io_state));
av_extend (state, items - 1);
sv_upgrade (data_sv, SVt_PV);
SvCUR_set (data_sv, sizeof (struct io_state));
SvPOK_only (data_sv);
{
struct io_state *data = (struct io_state *)SvPVX (data_sv);
data->errorno = errno;
data->laststype = PL_laststype;
data->laststatval = PL_laststatval;
data->statcache = PL_statcache;
}
/* now build the result vector out of all the parameters and the data_sv */
{
int i;
for (i = 0; i < items; ++i)
av_push (state, SvREFCNT_inc_NN (ST (i)));
}
av_push (state, data_sv);
api_ready (aTHX_ coro);
SvREFCNT_dec_NN (coro);
SvREFCNT_dec_NN ((AV *)state);
}
static int
slf_check_aio_req (pTHX_ struct CoroSLF *frame)
{
AV *state = (AV *)frame->data;
/* if we are about to throw, return early */
/* this does not cancel the aio request, but at least */
/* it quickly returns */
if (CORO_THROW)
return 0;
/* one element that is an RV? repeat! */
if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
return 1;
/* restore status */
{
SV *data_sv = av_pop (state);
struct io_state *data = (struct io_state *)SvPVX (data_sv);
errno = data->errorno;
PL_laststype = data->laststype;
PL_laststatval = data->laststatval;
PL_statcache = data->statcache;
SvREFCNT_dec_NN (data_sv);
}
/* push result values */
{
dSP;
int i;
EXTEND (SP, AvFILLp (state) + 1);
for (i = 0; i <= AvFILLp (state); ++i)
PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
PUTBACK;
}
return 0;
}
static void
slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
AV *state = (AV *)sv_2mortal ((SV *)newAV ());
SV *coro_hv = SvRV (coro_current);
struct coro *coro = SvSTATE_hv (coro_hv);
/* put our coroutine id on the state arg */
av_push (state, SvREFCNT_inc_NN (coro_hv));
/* first see whether we have a non-zero priority and set it as AIO prio */
if (coro->prio)
{
dSP;
static SV *prio_cv;
static SV *prio_sv;
if (ecb_expect_false (!prio_cv))
{
prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
prio_sv = newSViv (0);
}
PUSHMARK (SP);
sv_setiv (prio_sv, coro->prio);
XPUSHs (prio_sv);
PUTBACK;
call_sv (prio_cv, G_VOID | G_DISCARD);
}
/* now call the original request */
{
dSP;
CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
int i;
PUSHMARK (SP);
/* first push all args to the stack */
EXTEND (SP, items + 1);
for (i = 0; i < items; ++i)
PUSHs (arg [i]);
/* now push the callback closure */
PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
/* now call the AIO function - we assume our request is uncancelable */
PUTBACK;
call_sv ((SV *)req, G_VOID | G_DISCARD);
}
/* now that the request is going, we loop till we have a result */
frame->data = (void *)state;
frame->prepare = prepare_schedule;
frame->check = slf_check_aio_req;
}
static void
coro_aio_req_xs (pTHX_ CV *cv)
{
dXSARGS;
CORO_EXECUTE_SLF_XS (slf_init_aio_req);
XSRETURN_EMPTY;
}
/*****************************************************************************/
#if CORO_CLONE
# include "clone.c"
#endif
/*****************************************************************************/
static SV *
coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
{
SV *coro_sv;
struct coro *coro;
MAGIC *mg;
HV *hv;
SV *cb;
int i;
if (argc > 0)
{
cb = s_get_cv_croak (argv [0]);
if (!is_coro)
{
if (CvISXSUB (cb))
croak ("Coro::State doesn't support XS functions as coroutine start, caught");
if (!CvROOT (cb))
croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
}
}
Newz (0, coro, 1, struct coro);
coro->args = newAV ();
coro->flags = CF_NEW;
if (coro_first) coro_first->prev = coro;
coro->next = coro_first;
coro_first = coro;
coro->hv = hv = newHV ();
mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
mg->mg_flags |= MGf_DUP;
coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
if (argc > 0)
{
av_extend (coro->args, argc + is_coro - 1);
if (is_coro)
{
av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
cb = (SV *)cv_coro_run;
}
coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
for (i = 1; i < argc; i++)
av_push (coro->args, newSVsv (argv [i]));
}
return coro_sv;
}
#ifndef __cplusplus
ecb_cold XS(boot_Coro__State);
#endif
#if CORO_JIT
static void ecb_noinline ecb_cold
pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
{
dSP;
AV *av = newAV ();
av_store (av, 3, newSVuv (d));
av_store (av, 2, newSVuv (c));
av_store (av, 1, newSVuv (b));
av_store (av, 0, newSVuv (a));
XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
PUTBACK;
}
static void ecb_noinline ecb_cold
jit_init (pTHX)
{
dSP;
SV *load, *save;
char *map_base;
char *load_ptr, *save_ptr;
STRLEN load_len, save_len, map_len;
int count;
eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
PUSHMARK (SP);
#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
#include "state.h"
count = call_pv ("Coro::State::_jit", G_ARRAY);
SPAGAIN;
save = POPs; save_ptr = SvPVbyte (save, save_len);
load = POPs; load_ptr = SvPVbyte (load, load_len);
map_len = load_len + save_len + 16;
map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (map_base == (char *)MAP_FAILED)
map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
load_perl_slots = (load_save_perl_slots_type)map_base;
memcpy (map_base, load_ptr, load_len);
map_base += (load_len + 15) & ~15;
save_perl_slots = (load_save_perl_slots_type)map_base;
memcpy (map_base, save_ptr, save_len);
/* we are good citizens and try to make the page read-only, so the evil evil */
/* hackers might have it a bit more difficult */
mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
PUTBACK;
eval_pv ("undef &Coro::State::_jit", 1);
}
#endif
MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
PROTOTYPES: DISABLE
BOOT:
{
#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
#include "state.h"
#ifdef USE_ITHREADS
# if CORO_PTHREAD
coro_thx = PERL_GET_CONTEXT;
# endif
#endif
/* perl defines these to check for existance first, but why it doesn't */
/* just create them one at init time is not clear to me, except for */
/* programs trying to delete them, but... */
/* anyway, we declare this as invalid and make sure they are initialised here */
DEFSV;
ERRSV;
cctx_current = cctx_new_empty ();
irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
{
/*
* we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
* by coro_sig_vtbl in hash values.
*/
MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
/* this only works if perl doesn't have a vtbl for %SIG */
assert (!mg->mg_virtual);
/*
* The irony is that the perl API itself asserts that mg_virtual
* must be non-const, yet perl5porters insisted on marking their
* vtbls as read-only, just to thwart perl modules from patching
* them.
*/
mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
mg->mg_flags |= MGf_COPY;
coro_sigelem_vtbl = PL_vtbl_sigelem;
coro_sigelem_vtbl.svt_get = coro_sigelem_get;
coro_sigelem_vtbl.svt_set = coro_sigelem_set;
coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
}
rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
coro_state_stash = gv_stashpv ("Coro::State", TRUE);
newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
main_mainstack = PL_mainstack;
main_top_env = PL_top_env;
while (main_top_env->je_prev)
main_top_env = main_top_env->je_prev;
{
SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
if (!PL_custom_op_names) PL_custom_op_names = newHV ();
hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
}
coroapi.ver = CORO_API_VERSION;
coroapi.rev = CORO_API_REVISION;
coroapi.transfer = api_transfer;
coroapi.sv_state = SvSTATE_;
coroapi.execute_slf = api_execute_slf;
coroapi.prepare_nop = prepare_nop;
coroapi.prepare_schedule = prepare_schedule;
coroapi.prepare_cede = prepare_cede;
coroapi.prepare_cede_notself = prepare_cede_notself;
time_init (aTHX);
assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
#if CORO_JIT
PUTBACK;
jit_init (aTHX);
SPAGAIN;
#endif
}
SV *
new (SV *klass, ...)
ALIAS:
Coro::new = 1
CODE:
RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
OUTPUT:
RETVAL
void
transfer (...)
PROTOTYPE: $$
CODE:
CORO_EXECUTE_SLF_XS (slf_init_transfer);
SV *
clone (Coro::State coro)
CODE:
{
#if CORO_CLONE
struct coro *ncoro = coro_clone (aTHX_ coro);
MAGIC *mg;
/* TODO: too much duplication */
ncoro->hv = newHV ();
mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
mg->mg_flags |= MGf_DUP;
RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
#else
croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
#endif
}
OUTPUT:
RETVAL
int
cctx_stacksize (int new_stacksize = 0)
PROTOTYPE: ;$
CODE:
RETVAL = cctx_stacksize;
if (new_stacksize)
{
cctx_stacksize = new_stacksize;
++cctx_gen;
}
OUTPUT:
RETVAL
int
cctx_max_idle (int max_idle = 0)
PROTOTYPE: ;$
CODE:
RETVAL = cctx_max_idle;
if (max_idle > 1)
cctx_max_idle = max_idle;
OUTPUT:
RETVAL
int
cctx_count ()
PROTOTYPE:
CODE:
RETVAL = cctx_count;
OUTPUT:
RETVAL
int
cctx_idle ()
PROTOTYPE:
CODE:
RETVAL = cctx_idle;
OUTPUT:
RETVAL
void
list ()
PROTOTYPE:
PPCODE:
{
struct coro *coro;
for (coro = coro_first; coro; coro = coro->next)
if (coro->hv)
XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
}
void
call (Coro::State coro, SV *coderef)
ALIAS:
eval = 1
CODE:
{
if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
{
struct coro *current = SvSTATE_current;
struct CoroSLF slf_save;
if (current != coro)
{
PUTBACK;
save_perl (aTHX_ current);
load_perl (aTHX_ coro);
/* the coro is most likely in an active SLF call.
* while not strictly required (the code we execute is
* not allowed to call any SLF functions), it's cleaner
* to reinitialise the slf_frame and restore it later.
* This might one day allow us to actually do SLF calls
* from code executed here.
*/
slf_save = slf_frame;
slf_frame.prepare = 0;
SPAGAIN;
}
PUSHSTACK;
PUSHMARK (SP);
PUTBACK;
if (ix)
eval_sv (coderef, 0);
else
call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
POPSTACK;
SPAGAIN;
if (current != coro)
{
PUTBACK;
slf_frame = slf_save;
save_perl (aTHX_ coro);
load_perl (aTHX_ current);
SPAGAIN;
}
}
}
SV *
is_ready (Coro::State coro)
PROTOTYPE: $
ALIAS:
is_ready = CF_READY
is_running = CF_RUNNING
is_new = CF_NEW
is_destroyed = CF_ZOMBIE
is_zombie = CF_ZOMBIE
is_suspended = CF_SUSPENDED
CODE:
RETVAL = boolSV (coro->flags & ix);
OUTPUT:
RETVAL
void
throw (SV *self, SV *exception = &PL_sv_undef)
PROTOTYPE: $;$
CODE:
{
struct coro *coro = SvSTATE (self);
struct coro *current = SvSTATE_current;
SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
SvREFCNT_dec (*exceptionp);
SvGETMAGIC (exception);
*exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
api_ready (aTHX_ self);
}
void
api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
PROTOTYPE: $;$
C_ARGS: aTHX_ coro, flags
SV *
has_cctx (Coro::State coro)
PROTOTYPE: $
CODE:
/* maybe manage the running flag differently */
RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
OUTPUT:
RETVAL
int
is_traced (Coro::State coro)
PROTOTYPE: $
CODE:
RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
OUTPUT:
RETVAL
UV
rss (Coro::State coro)
PROTOTYPE: $
ALIAS:
usecount = 1
CODE:
switch (ix)
{
case 0: RETVAL = coro_rss (aTHX_ coro); break;
case 1: RETVAL = coro->usecount; break;
}
OUTPUT:
RETVAL
void
force_cctx ()
PROTOTYPE:
CODE:
cctx_current->idle_sp = 0;
void
swap_defsv (Coro::State self)
PROTOTYPE: $
ALIAS:
swap_defav = 1
CODE:
if (!self->slot)
croak ("cannot swap state with coroutine that has no saved state,");
else
{
SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
SV *tmp = *src; *src = *dst; *dst = tmp;
}
void
cancel (Coro::State self)
CODE:
coro_state_destroy (aTHX_ self);
SV *
enable_times (int enabled = enable_times)
CODE:
{
RETVAL = boolSV (enable_times);
if (enabled != enable_times)
{
enable_times = enabled;
coro_times_update ();
(enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
}
}
OUTPUT:
RETVAL
void
times (Coro::State self)
PPCODE:
{
struct coro *current = SvSTATE (coro_current);
if (ecb_expect_false (current == self))
{
coro_times_update ();
coro_times_add (SvSTATE (coro_current));
}
EXTEND (SP, 2);
PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
if (ecb_expect_false (current == self))
coro_times_sub (SvSTATE (coro_current));
}
void
swap_sv (Coro::State coro, SV *sva, SV *svb)
CODE:
{
struct coro *current = SvSTATE_current;
AV *swap_sv;
int i;
sva = SvRV (sva);
svb = SvRV (svb);
if (current == coro)
SWAP_SVS_LEAVE (current);
if (!coro->swap_sv)
coro->swap_sv = newAV ();
swap_sv = coro->swap_sv;
for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
{
SV *a = AvARRAY (swap_sv)[i ];
SV *b = AvARRAY (swap_sv)[i + 1];
if (a == sva && b == svb)
{
SvREFCNT_dec_NN (a);
SvREFCNT_dec_NN (b);
for (; i <= AvFILLp (swap_sv) - 2; i++)
AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
AvFILLp (swap_sv) -= 2;
goto removed;
}
}
av_push (swap_sv, SvREFCNT_inc_NN (sva));
av_push (swap_sv, SvREFCNT_inc_NN (svb));
removed:
if (current == coro)
SWAP_SVS_ENTER (current);
}
MODULE = Coro::State PACKAGE = Coro
BOOT:
{
if (SVt_LAST > 32)
croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
coro_stash = gv_stashpv ("Coro", TRUE);
newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
{
SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
coroapi.schedule = api_schedule;
coroapi.schedule_to = api_schedule_to;
coroapi.cede = api_cede;
coroapi.cede_notself = api_cede_notself;
coroapi.ready = api_ready;
coroapi.is_ready = api_is_ready;
coroapi.nready = coro_nready;
coroapi.current = coro_current;
coroapi.enterleave_hook = api_enterleave_hook;
coroapi.enterleave_unhook = api_enterleave_unhook;
coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
/*GCoroAPI = &coroapi;*/
sv_setiv (sv, PTR2IV (&coroapi));
SvREADONLY_on (sv);
}
}
SV *
async (...)
PROTOTYPE: &@
CODE:
RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
api_ready (aTHX_ RETVAL);
OUTPUT:
RETVAL
void
_destroy (Coro::State coro)
CODE:
/* used by the manager thread */
coro_state_destroy (aTHX_ coro);
void
on_destroy (Coro::State coro, SV *cb)
CODE:
coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
void
join (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_join);
void
terminate (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_terminate);
void
cancel (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_cancel);
int
safe_cancel (Coro::State self, ...)
C_ARGS: aTHX_ self, &ST (1), items - 1
void
schedule (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_schedule);
void
schedule_to (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
void
cede_to (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_cede_to);
void
cede (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_cede);
void
cede_notself (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
void
_set_current (SV *current)
PROTOTYPE: $
CODE:
SvREFCNT_dec_NN (SvRV (coro_current));
SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
void
_set_readyhook (SV *hook)
PROTOTYPE: $
CODE:
SvREFCNT_dec (coro_readyhook);
SvGETMAGIC (hook);
if (SvOK (hook))
{
coro_readyhook = newSVsv (hook);
CORO_READYHOOK = invoke_sv_ready_hook_helper;
}
else
{
coro_readyhook = 0;
CORO_READYHOOK = 0;
}
int
prio (Coro::State coro, int newprio = 0)
PROTOTYPE: $;$
ALIAS:
nice = 1
CODE:
{
RETVAL = coro->prio;
if (items > 1)
{
if (ix)
newprio = coro->prio - newprio;
if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
coro->prio = newprio;
}
}
OUTPUT:
RETVAL
SV *
ready (SV *self)
PROTOTYPE: $
CODE:
RETVAL = boolSV (api_ready (aTHX_ self));
OUTPUT:
RETVAL
int
nready (...)
PROTOTYPE:
CODE:
RETVAL = coro_nready;
OUTPUT:
RETVAL
void
suspend (Coro::State self)
PROTOTYPE: $
CODE:
self->flags |= CF_SUSPENDED;
void
resume (Coro::State self)
PROTOTYPE: $
CODE:
self->flags &= ~CF_SUSPENDED;
void
_pool_handler (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
void
async_pool (SV *cv, ...)
PROTOTYPE: &@
PPCODE:
{
HV *hv = (HV *)av_pop (av_async_pool);
AV *av = newAV ();
SV *cb = ST (0);
int i;
av_extend (av, items - 2);
for (i = 1; i < items; ++i)
av_push (av, SvREFCNT_inc_NN (ST (i)));
if ((SV *)hv == &PL_sv_undef)
{
SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
SvREFCNT_dec_NN (sv);
}
{
struct coro *coro = SvSTATE_hv (hv);
assert (!coro->invoke_cb);
assert (!coro->invoke_av);
coro->invoke_cb = SvREFCNT_inc (cb);
coro->invoke_av = av;
}
api_ready (aTHX_ (SV *)hv);
if (GIMME_V != G_VOID)
XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
else
SvREFCNT_dec_NN (hv);
}
SV *
rouse_cb ()
PROTOTYPE:
CODE:
RETVAL = coro_new_rouse_cb (aTHX);
OUTPUT:
RETVAL
void
rouse_wait (...)
PROTOTYPE: ;$
PPCODE:
CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
void
on_enter (SV *block)
ALIAS:
on_leave = 1
PROTOTYPE: &
CODE:
{
struct coro *coro = SvSTATE_current;
AV **avp = ix ? &coro->on_leave : &coro->on_enter;
block = s_get_cv_croak (block);
if (!*avp)
*avp = newAV ();
av_push (*avp, SvREFCNT_inc (block));
if (!ix)
on_enterleave_call (aTHX_ block);
LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
}
MODULE = Coro::State PACKAGE = PerlIO::cede
BOOT:
PerlIO_define_layer (aTHX_ &PerlIO_cede);
MODULE = Coro::State PACKAGE = Coro::Semaphore
SV *
new (SV *klass, SV *count = 0)
CODE:
{
int semcnt = 1;
if (count)
{
SvGETMAGIC (count);
if (SvOK (count))
semcnt = SvIV (count);
}
RETVAL = sv_bless (
coro_waitarray_new (aTHX_ semcnt),
GvSTASH (CvGV (cv))
);
}
OUTPUT:
RETVAL
# helper for Coro::Channel and others
SV *
_alloc (int count)
CODE:
RETVAL = coro_waitarray_new (aTHX_ count);
OUTPUT:
RETVAL
SV *
count (SV *self)
CODE:
RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
OUTPUT:
RETVAL
void
up (SV *self)
CODE:
coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
void
adjust (SV *self, int adjust)
CODE:
coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
void
down (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
void
wait (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
void
try (SV *self)
PPCODE:
{
AV *av = (AV *)SvRV (self);
SV *count_sv = AvARRAY (av)[0];
IV count = SvIVX (count_sv);
if (count > 0)
{
--count;
SvIVX (count_sv) = count;
XSRETURN_YES;
}
else
XSRETURN_NO;
}
void
waiters (SV *self)
PPCODE:
{
AV *av = (AV *)SvRV (self);
int wcount = AvFILLp (av) + 1 - 1;
if (GIMME_V == G_SCALAR)
XPUSHs (sv_2mortal (newSViv (wcount)));
else
{
int i;
EXTEND (SP, wcount);
for (i = 1; i <= wcount; ++i)
PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
}
}
MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
void
_may_delete (SV *sem, int count, unsigned int extra_refs)
PPCODE:
{
AV *av = (AV *)SvRV (sem);
if (SvREFCNT ((SV *)av) == 1 + extra_refs
&& AvFILLp (av) == 0 /* no waiters, just count */
&& SvIV (AvARRAY (av)[0]) == count)
XSRETURN_YES;
XSRETURN_NO;
}
MODULE = Coro::State PACKAGE = Coro::Signal
SV *
new (SV *klass)
CODE:
RETVAL = sv_bless (
coro_waitarray_new (aTHX_ 0),
GvSTASH (CvGV (cv))
);
OUTPUT:
RETVAL
void
wait (...)
CODE:
CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
void
broadcast (SV *self)
CODE:
{
AV *av = (AV *)SvRV (self);
coro_signal_wake (aTHX_ av, AvFILLp (av));
}
void
send (SV *self)
CODE:
{
AV *av = (AV *)SvRV (self);
if (AvFILLp (av))
coro_signal_wake (aTHX_ av, 1);
else
SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
}
IV
awaited (SV *self)
CODE:
RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
OUTPUT:
RETVAL
MODULE = Coro::State PACKAGE = Coro::AnyEvent
BOOT:
sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
void
_schedule (...)
CODE:
{
static int incede;
api_cede_notself (aTHX);
++incede;
while (coro_nready >= incede && api_cede (aTHX))
;
sv_setsv (sv_activity, &PL_sv_undef);
if (coro_nready >= incede)
{
PUSHMARK (SP);
PUTBACK;
call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
}
--incede;
}
MODULE = Coro::State PACKAGE = Coro::AIO
void
_register (char *target, char *proto, SV *req)
CODE:
{
SV *req_cv = s_get_cv_croak (req);
/* newXSproto doesn't return the CV on 5.8 */
CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
sv_setpv ((SV *)slf_cv, proto);
sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
}
MODULE = Coro::State PACKAGE = Coro::Select
void
patch_pp_sselect ()
CODE:
if (!coro_old_pp_sselect)
{
coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
}
void
unpatch_pp_sselect ()
CODE:
if (coro_old_pp_sselect)
{
PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
coro_old_pp_sselect = 0;
}
MODULE = Coro::State PACKAGE = Coro::Util
void
_exit (int code)
CODE:
_exit (code);
NV
time ()
CODE:
RETVAL = nvtime (aTHX);
OUTPUT:
RETVAL
NV
gettimeofday ()
PPCODE:
{
UV tv [2];
u2time (aTHX_ tv);
EXTEND (SP, 2);
PUSHs (sv_2mortal (newSVuv (tv [0])));
PUSHs (sv_2mortal (newSVuv (tv [1])));
}