Florian Ragwitz > B-Hooks-OP-Check-StashChange-0.06 > B::Hooks::OP::Check::StashChange

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Module Version: 0.06   Source  

NAME ^

B::Hooks::OP::Check::StashChange - Invoke callbacks when the stash code is being compiled in changes

SYNOPSIS ^

From Perl

    package Foo;

    use B::Hooks::OP::Check::StashChange;

    our $id = B::Hooks::OP::Check::StashChange::register(sub {
        my ($new, $old) = @_;
        warn "${old} -> ${new}";
    });

    package Bar; # "Foo -> Bar"

    B::Hooks::OP::Check::StashChange::unregister($Foo::id);

    package Moo; # callback not invoked

From C/XS

    #include "hooks_op_check_stashchange.h"

    STATIC OP *
    my_callback (pTHX_ OP *op, char *new_stash, char *old_stash, void *user_data) {
        /* ... */
        return op;
    }

    UV id;

    /* register callback */
    id = hook_op_check_stashchange (cv, my_callback, NULL);

    /* unregister */
    hook_op_check_stashchange_remove (id);

DESCRIPTION ^

Perl API ^

register

    B::Hooks::OP::Check::

    # or
    my $id = B::Hooks::OP::Check::StashChange::register(\&callback);

Register callback when an opcode is being compiled in a different namespace than the previous one.

An id that can be used for later removal of the handler using unregister is returned.

unregister

    B::Hooks::OP::Check::StashChange::unregister($id);

Disable the callback referenced by $id.

C API ^

TYPES

OP *(*hook_op_check_stashchange_cb) (pTHX_ OP *op, const char *new_stash, const char *old_stash, void *user_data)

The type the callbacks need to implement.

FUNCTIONS

UV hook_op_check_stashchange (hook_op_check_stashchange_cb cb, void *user_data)

Register the callback cb to be when an opcode is compiled in a different namespace than the previous. user_data will be passed to the callback as the last argument.

Returns an id that can be used to remove the handler using hook_op_check_stashchange_remove.

void *hook_op_check_stashchange_remove (UV id)

Remove a previously registered handler referred to by id.

Returns the user data that was associated with the handler.

SEE ALSO ^

B::Hooks::OP::Check

AUTHOR ^

Florian Ragwitz <rafl@debian.org>

COPYRIGHT AND LICENSE ^

Copyright (c) 2008 Florian Ragwitz

This module is free software.

You may distribute this code under the same terms as Perl itself.

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