Current File : //lib/x86_64-linux-gnu/perl/5.38.2/IPC/SysV.pm
################################################################################
#
# Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz <mhx@cpan.org>.
# Version 1.x, Copyright (C) 1997, Graham Barr <gbarr@pobox.com>.
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
################################################################################
package IPC::SysV;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $VERSION $AUTOLOAD);
use Carp;
use Config;
require Exporter;
@ISA = qw(Exporter);
$VERSION = '2.09';
# To support new constants, just add them to @EXPORT_OK
# and the C/XS code will be generated automagically.
@EXPORT_OK = (qw(
GETALL GETNCNT GETPID GETVAL GETZCNT
IPC_ALLOC IPC_CREAT IPC_EXCL IPC_GETACL IPC_INFO IPC_LOCKED
IPC_M IPC_NOERROR IPC_NOWAIT IPC_PRIVATE IPC_R IPC_RMID
IPC_SET IPC_SETACL IPC_SETLABEL IPC_STAT IPC_W IPC_WANTED
MSG_EXCEPT MSG_FWAIT MSG_INFO MSG_LOCKED MSG_MWAIT MSG_NOERROR
MSG_QWAIT MSG_R MSG_RWAIT MSG_STAT MSG_W MSG_WAIT MSG_WWAIT
SEM_A SEM_ALLOC SEM_DEST SEM_ERR SEM_INFO SEM_ORDER SEM_R
SEM_STAT SEM_UNDO
SETALL SETVAL
SHMLBA
SHM_A SHM_CLEAR SHM_COPY SHM_DCACHE SHM_DEST SHM_ECACHE
SHM_FMAP SHM_HUGETLB SHM_ICACHE SHM_INFO SHM_INIT SHM_LOCK
SHM_LOCKED SHM_MAP SHM_NORESERVE SHM_NOSWAP SHM_R SHM_RDONLY
SHM_REMAP SHM_REMOVED SHM_RND SHM_SHARE_MMU SHM_SHATTR
SHM_SIZE SHM_STAT SHM_UNLOCK SHM_W
S_IRUSR S_IWUSR S_IXUSR S_IRWXU
S_IRGRP S_IWGRP S_IXGRP S_IRWXG
S_IROTH S_IWOTH S_IXOTH S_IRWXO
ENOSPC ENOSYS ENOMEM EACCES
), qw(
ftok shmat shmdt memread memwrite
));
%EXPORT_TAGS = (
all => [@EXPORT, @EXPORT_OK],
);
sub AUTOLOAD
{
my $constname = $AUTOLOAD;
$constname =~ s/.*:://;
die "&IPC::SysV::_constant not defined" if $constname eq '_constant';
my ($error, $val) = _constant($constname);
if ($error) {
my (undef, $file, $line) = caller;
die "$error at $file line $line.\n";
}
{
no strict 'refs';
*$AUTOLOAD = sub { $val };
}
goto &$AUTOLOAD;
}
BOOT_XS: {
# If I inherit DynaLoader then I inherit AutoLoader and I DON'T WANT TO
use XSLoader ();
XSLoader::load( 'IPC::SysV', $VERSION );
}
1;
__END__
=head1 NAME
IPC::SysV - System V IPC constants and system calls
=head1 SYNOPSIS
use IPC::SysV qw(IPC_STAT IPC_PRIVATE);
=head1 DESCRIPTION
C<IPC::SysV> defines and conditionally exports all the constants
defined in your system include files which are needed by the SysV
IPC calls. Common ones include
IPC_CREAT IPC_EXCL IPC_NOWAIT IPC_PRIVATE IPC_RMID IPC_SET IPC_STAT
GETVAL SETVAL GETPID GETNCNT GETZCNT GETALL SETALL
SEM_A SEM_R SEM_UNDO
SHM_RDONLY SHM_RND SHMLBA
and auxiliary ones
S_IRUSR S_IWUSR S_IRWXU
S_IRGRP S_IWGRP S_IRWXG
S_IROTH S_IWOTH S_IRWXO
but your system might have more.
=over 4
=item ftok( PATH )
=item ftok( PATH, ID )
Return a key based on PATH and ID, which can be used as a key for
C<msgget>, C<semget> and C<shmget>. See L<ftok(3)>.
If ID is omitted, it defaults to C<1>. If a single character is
given for ID, the numeric value of that character is used.
=item shmat( ID, ADDR, FLAG )
Attach the shared memory segment identified by ID to the address
space of the calling process. See L<shmat(2)>.
ADDR should be C<undef> unless you really know what you're doing.
=item shmdt( ADDR )
Detach the shared memory segment located at the address specified
by ADDR from the address space of the calling process. See L<shmdt(2)>.
=item memread( ADDR, VAR, POS, SIZE )
Reads SIZE bytes from a memory segment at ADDR starting at position POS.
VAR must be a variable that will hold the data read. Returns true if
successful, or false if there is an error. memread() taints the variable.
=item memwrite( ADDR, STRING, POS, SIZE )
Writes SIZE bytes from STRING to a memory segment at ADDR starting at
position POS. If STRING is too long, only SIZE bytes are used; if STRING
is too short, nulls are written to fill out SIZE bytes. Returns true if
successful, or false if there is an error.
=back
=head1 SEE ALSO
L<IPC::Msg>, L<IPC::Semaphore>, L<IPC::SharedMem>, L<ftok(3)>, L<shmat(2)>, L<shmdt(2)>
=head1 AUTHORS
Graham Barr <gbarr@pobox.com>,
Jarkko Hietaniemi <jhi@iki.fi>,
Marcus Holland-Moritz <mhx@cpan.org>
=head1 COPYRIGHT
Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz.
Version 1.x, Copyright (c) 1997, Graham Barr.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
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