NAME

       B::Hooks::OP::PPAddr - Hook into opcode execution

SYNOPSIS

           #include "hook_op_check.h"
           #include "hook_op_ppaddr.h"

           STATIC OP *
           execute_entereval (pTHX_ OP *op, void *user_data) {
               ...
           }

           STATIC OP *
           check_entereval (pTHX_ OP *op, void *user_data) {
               hook_op_ppaddr (op, execute_entereval, NULL);
           }

           hook_op_check (OP_ENTEREVAL, check_entereval, NULL);

DESCRIPTION

       This module provides a c api for XS modules to hook into the execution of perl opcodes.

       ExtUtils::Depends is used to export all functions for other XS modules to use. Include the
       following in your Makefile.PL:

           my $pkg = ExtUtils::Depends->new('Your::XSModule', 'B::Hooks::OP::PPAddr');
           WriteMakefile(
               ... # your normal makefile flags
               $pkg->get_makefile_vars,
           );

       Your XS module can now include "hook_op_ppaddr.h".

TYPES

   typedef OP *(*hook_op_ppaddr_cb_t) (pTHX_ OP *, void *user_data)
       Type that callbacks need to implement.

FUNCTIONS

   void hook_op_ppaddr (OP *op, hook_op_ppaddr_cb_t cb, void *user_data)
       Replace the function to execute "op" with the callback "cb". "user_data" will be passed to
       the callback as the last argument.

   void hook_op_ppaddr_around (OP *op, hook_op_ppaddr_cb_t before, hook_op_ppaddr_cb_t after,
       void *user_data)
       Register the callbacks "before" and "after" to be called before and after the execution of
       "op". "user_data" will be passed to the callback as the last argument.

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.