/* -*- Mode: C; tab-width: 2; c-basic-offset: 2; indent-tabs-mode: nil -*- */
#ifndef LIBMEMCACHED_PROTOCOL_COMMON_H
#define LIBMEMCACHED_PROTOCOL_COMMON_H
#include "config.h"
#if !defined(__cplusplus)
# include <stdbool.h>
#endif
#include <assert.h>
/* Define this here, which will turn on the visibilty controls while we're
* building libmemcached.
*/
#define BUILDING_LIBMEMCACHED 1
#include <libmemcached/byteorder.h>
#include <libmemcached/protocol_handler.h>
#include <libmemcached/protocol/cache.h>
/*
* I don't really need the following two functions as function pointers
* in the instance handle, but I don't want to put them in the global
* namespace for those linking statically (personally I don't like that,
* but some people still do). If it ever shows up as a performance thing
* I'll look into optimizing this ;-)
*/
typedef bool (*drain_func)(memcached_protocol_client_st *client);
typedef protocol_binary_response_status (*spool_func)(memcached_protocol_client_st *client,
const void *data,
size_t length);
/**
* Definition of the per instance structure.
*/
struct memcached_protocol_st {
memcached_binary_protocol_callback_st *callback;
memcached_protocol_recv_func recv;
memcached_protocol_send_func send;
/*
* I really don't need these as funciton pointers, but I don't want
* to clutter the namespace if someone links statically.
*/
drain_func drain;
spool_func spool;
/*
* To avoid keeping a buffer in each client all the time I have a
* bigger buffer in the instance that I read to initially, and then
* I try to parse and execute as much from the buffer. If I wasn't able
* to process all data I'll keep that in a per-connection buffer until
* the next time I can read from the socket.
*/
uint8_t *input_buffer;
size_t input_buffer_size;
bool pedantic;
/* @todo use multiple sized buffers */
cache_t *buffer_cache;
};
struct chunk_st {
/* Pointer to the data */
char *data;
/* The offset to the first byte into the buffer that is used */
size_t offset;
/* The offset into the buffer for the first free byte */
size_t nbytes;
/* The number of bytes in the buffer */
size_t size;
/* Pointer to the next buffer in the chain */
struct chunk_st *next;
};
#define CHUNK_BUFFERSIZE 2048
typedef memcached_protocol_event_t (*process_data)(struct memcached_protocol_client_st *client, ssize_t *length, void **endptr);
enum ascii_cmd {
GET_CMD,
GETS_CMD,
SET_CMD,
ADD_CMD,
REPLACE_CMD,
CAS_CMD,
APPEND_CMD,
PREPEND_CMD,
DELETE_CMD,
INCR_CMD,
DECR_CMD,
STATS_CMD,
FLUSH_ALL_CMD,
VERSION_CMD,
QUIT_CMD,
VERBOSITY_CMD,
UNKNOWN_CMD,
};
struct memcached_protocol_client_st {
memcached_protocol_st *root;
memcached_socket_t sock;
int error;
/* Linked list of data to send */
struct chunk_st *output;
struct chunk_st *output_tail;
/*
* While we process input data, this is where we spool incomplete commands
* if we need to receive more data....
* @todo use the buffercace
*/
uint8_t *input_buffer;
size_t input_buffer_size;
size_t input_buffer_offset;
/* The callback to the protocol handler to use (ascii or binary) */
process_data work;
/*
* Should the spool data discard the data to send or not? (aka noreply in
* the ascii protocol..
*/
bool mute;
/* Members used by the binary protocol */
protocol_binary_request_header *current_command;
/* Members used by the ascii protocol */
enum ascii_cmd ascii_command;
};
#include "ascii_handler.h"
#include "binary_handler.h"
#endif