/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Hooks/OP/Check.pm is in libb-hooks-op-check-perl 0.19-2build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | use strict;
use warnings;
package B::Hooks::OP::Check;
require 5.008001;
use parent qw/DynaLoader/;
our $VERSION = '0.19';
sub dl_load_flags { 0x01 }
__PACKAGE__->bootstrap($VERSION);
1;
__END__
=head1 NAME
B::Hooks::OP::Check - Wrap OP check callbacks
=head1 SYNOPSIS
# include "hook_op_check.h"
STATIC OP *my_const_check_op (pTHX_ OP *op, void *user_data) {
/* ... */
return op;
}
STATIC hook_op_check_id my_hook_id = 0;
void
setup ()
CODE:
my_hook_id = hook_op_check (OP_CONST, my_const_check_op, NULL);
void
teardown ()
CODE:
hook_op_check_remove (OP_CONST, my_hook_id);
=head1 DESCRIPTION
This module provides a c api for XS modules to hook into the callbacks of
C<PL_check>.
L<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::Check');
WriteMakefile(
... # your normal makefile flags
$pkg->get_makefile_vars,
);
Your XS module can now include C<hook_op_check.h>.
=head1 TYPES
=head2 typedef OP *(*hook_op_check_cb) (pTHX_ OP *, void *);
Type that callbacks need to implement.
=head2 typedef UV hook_op_check_id
Type to identify a callback.
=head1 FUNCTIONS
=head2 hook_op_check_id hook_op_check (opcode type, hook_op_check_cb cb, void *user_data)
Register the callback C<cb> to be called after the C<PL_check> function for
opcodes of the given C<type>. C<user_data> will be passed to the callback as
the last argument. Returns an id that can be used to remove the callback later
on.
=head2 void *hook_op_check_remove (opcode type, hook_op_check_id id)
Remove the callback identified by C<id>. Returns the userdata the callback had.
=head1 AUTHOR
Florian Ragwitz E<lt>rafl@debian.orgE<gt>
=head1 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.
=cut
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