dslinux/user/perl/ext/IPC/SysV ChangeLog MANIFEST Makefile.PL Msg.pm README Semaphore.pm SysV.pm SysV.xs

cayenne dslinux_cayenne at user.in-berlin.de
Mon Dec 4 17:59:32 CET 2006


Update of /cvsroot/dslinux/dslinux/user/perl/ext/IPC/SysV
In directory antilope:/tmp/cvs-serv17422/ext/IPC/SysV

Added Files:
	ChangeLog MANIFEST Makefile.PL Msg.pm README Semaphore.pm 
	SysV.pm SysV.xs 
Log Message:
Adding fresh perl source to HEAD to branch from

--- NEW FILE: SysV.pm ---
# IPC::SysV.pm
#
# Copyright (c) 1997 Graham Barr <gbarr at pobox.com>. All rights reserved.
# 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 $XS_VERSION);
use Carp;
use Config;

require Exporter;
@ISA = qw(Exporter);

$VERSION = "1.04";
$XS_VERSION = $VERSION;
$VERSION = eval $VERSION;

@EXPORT_OK = qw(
	GETALL GETNCNT GETPID GETVAL GETZCNT

	IPC_ALLOC IPC_CREAT IPC_EXCL IPC_GETACL 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_FWAIT MSG_LOCKED MSG_MWAIT MSG_NOERROR MSG_QWAIT
	MSG_R MSG_RWAIT MSG_STAT MSG_W MSG_WWAIT

	SEM_A SEM_ALLOC SEM_DEST SEM_ERR SEM_ORDER SEM_R SEM_UNDO

	SETALL SETVAL

	SHMLBA

	SHM_A SHM_CLEAR SHM_COPY SHM_DCACHE SHM_DEST SHM_ECACHE
	SHM_FMAP SHM_ICACHE SHM_INIT SHM_LOCK SHM_LOCKED SHM_MAP
	SHM_NOSWAP SHM_R SHM_RDONLY SHM_REMOVED SHM_RND SHM_SHARE_MMU
	SHM_SHATTR SHM_SIZE SHM_UNLOCK SHM_W

	S_IRUSR S_IWUSR S_IRWXU
	S_IRGRP S_IWGRP S_IRWXG
	S_IROTH S_IWOTH S_IRWXO

	ftok
);

BOOT_XS: {
    # If I inherit DynaLoader then I inherit AutoLoader and I DON'T WANT TO
    require DynaLoader;

    # DynaLoader calls dl_load_flags as a static method.
    *dl_load_flags = DynaLoader->can('dl_load_flags');

    do {
	__PACKAGE__->can('bootstrap') || \&DynaLoader::bootstrap
    }->(__PACKAGE__, $XS_VERSION);
}

1;

__END__

=head1 NAME

IPC::SysV - SysV IPC constants

=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.

=over 4

=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>

=back

=head1 SEE ALSO

L<IPC::Msg>, L<IPC::Semaphore>, L<ftok>

=head1 AUTHORS

Graham Barr <gbarr at pobox.com>
Jarkko Hietaniemi <jhi at iki.fi>

=head1 COPYRIGHT

Copyright (c) 1997 Graham Barr. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut


--- NEW FILE: Makefile.PL ---
# This -*- perl -*- script makes the Makefile
# $Id: Makefile.PL,v 1.2 2006-12-04 16:59:28 dslinux_cayenne Exp $

require 5.002;
use ExtUtils::MakeMaker;

#--- MY package

sub MY::libscan
{
 my($self,$path) = @_;

 return '' 
	if($path =~ m:/(RCS|CVS|SCCS)/: ||
	   $path =~ m:[~%]$: ||
	   $path =~ m:\.(orig|rej)$:
	  );
 
 $path;
}

WriteMakefile(
	VERSION_FROM	=> "SysV.pm",
	NAME      	=> "IPC::SysV",
	MAN3PODS	=> {}, 	# Pods will be built by installman.
 
	'dist'    	=> {COMPRESS => 'gzip -9f',
			    SUFFIX   => 'gz', 
			    DIST_DEFAULT => 'all tardist',
			   },
 
	'clean'   	=> {FILES => join(" ",
					map { "$_ */$_ */*/$_" }
					qw(*% *.html *.b[ac]k *.old))
			   },
	'macro'		=> { INSTALLDIRS => 'perl' },
);

--- NEW FILE: SysV.xs ---
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <sys/types.h>
#ifdef __linux__
#   include <asm/page.h>
#endif
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
#ifndef HAS_SEM
#   include <sys/ipc.h>
#endif
#   ifdef HAS_MSG
#       include <sys/msg.h>
#   endif
#   ifdef HAS_SHM
#       if defined(PERL_SCO) || defined(PERL_ISC)
#           include <sys/sysmacros.h>	/* SHMLBA */
#       endif
#      include <sys/shm.h>
#      ifndef HAS_SHMAT_PROTOTYPE
           extern Shmat_t shmat (int, char *, int);
#      endif
#      if defined(__sparc__) && (defined(__NetBSD__) || defined(__OpenBSD__))
#          undef  SHMLBA /* not static: determined at boot time */
#          define SHMLBA getpagesize()
#      endif
#   endif
#endif

/* Required to get 'struct pte' for SHMLBA on ULTRIX. */
#if defined(__ultrix) || defined(__ultrix__) || defined(ultrix)
#include <machine/pte.h>
#endif

/* Required in BSDI to get PAGE_SIZE definition for SHMLBA.
 * Ugly.  More beautiful solutions welcome.
 * Shouting at BSDI sounds quite beautiful. */
#ifdef __bsdi__
#   include <vm/vm_param.h>	/* move upwards under HAS_SHM? */
#endif

#ifndef S_IRWXU
#   ifdef S_IRUSR
#       define S_IRWXU (S_IRUSR|S_IWUSR|S_IWUSR)
#       define S_IRWXG (S_IRGRP|S_IWGRP|S_IWGRP)
#       define S_IRWXO (S_IROTH|S_IWOTH|S_IWOTH)
#   else
#       define S_IRWXU 0700
#       define S_IRWXG 0070
#       define S_IRWXO 0007
#   endif
#endif

MODULE=IPC::SysV	PACKAGE=IPC::Msg::stat

PROTOTYPES: ENABLE

void
pack(obj)
    SV	* obj
PPCODE:
{
#ifdef HAS_MSG
    SV *sv;
    struct msqid_ds ds;
    AV *list = (AV*)SvRV(obj);
    sv = *av_fetch(list,0,TRUE); ds.msg_perm.uid = SvIV(sv);
    sv = *av_fetch(list,1,TRUE); ds.msg_perm.gid = SvIV(sv);
    sv = *av_fetch(list,4,TRUE); ds.msg_perm.mode = SvIV(sv);
    sv = *av_fetch(list,6,TRUE); ds.msg_qbytes = SvIV(sv);
    ST(0) = sv_2mortal(newSVpvn((char *)&ds,sizeof(ds)));
    XSRETURN(1);
#else
    croak("System V msgxxx is not implemented on this machine");
#endif
}

void
unpack(obj,buf)
    SV * obj
    SV * buf
PPCODE:
{
#ifdef HAS_MSG
    STRLEN len;
    SV **sv_ptr;
    struct msqid_ds *ds = (struct msqid_ds *)SvPV(buf,len);
    AV *list = (AV*)SvRV(obj);
    if (len != sizeof(*ds)) {
	croak("Bad arg length for %s, length is %d, should be %d",
		    "IPC::Msg::stat",
		    len, sizeof(*ds));
    }
    sv_ptr = av_fetch(list,0,TRUE);
    sv_setiv(*sv_ptr, ds->msg_perm.uid);
    sv_ptr = av_fetch(list,1,TRUE);
    sv_setiv(*sv_ptr, ds->msg_perm.gid);
    sv_ptr = av_fetch(list,2,TRUE);
    sv_setiv(*sv_ptr, ds->msg_perm.cuid);
    sv_ptr = av_fetch(list,3,TRUE);
    sv_setiv(*sv_ptr, ds->msg_perm.cgid);
    sv_ptr = av_fetch(list,4,TRUE);
    sv_setiv(*sv_ptr, ds->msg_perm.mode);
    sv_ptr = av_fetch(list,5,TRUE);
    sv_setiv(*sv_ptr, ds->msg_qnum);
    sv_ptr = av_fetch(list,6,TRUE);
    sv_setiv(*sv_ptr, ds->msg_qbytes);
    sv_ptr = av_fetch(list,7,TRUE);
    sv_setiv(*sv_ptr, ds->msg_lspid);
    sv_ptr = av_fetch(list,8,TRUE);
    sv_setiv(*sv_ptr, ds->msg_lrpid);
    sv_ptr = av_fetch(list,9,TRUE);
    sv_setiv(*sv_ptr, ds->msg_stime);
    sv_ptr = av_fetch(list,10,TRUE);
    sv_setiv(*sv_ptr, ds->msg_rtime);
    sv_ptr = av_fetch(list,11,TRUE);
    sv_setiv(*sv_ptr, ds->msg_ctime);
    XSRETURN(1);
#else
    croak("System V msgxxx is not implemented on this machine");
#endif
}

MODULE=IPC::SysV	PACKAGE=IPC::Semaphore::stat

void
unpack(obj,ds)
    SV * obj
    SV * ds
PPCODE:
{
#ifdef HAS_SEM
    STRLEN len;
    AV *list = (AV*)SvRV(obj);
    struct semid_ds *data = (struct semid_ds *)SvPV(ds,len);
    if(!sv_isa(obj, "IPC::Semaphore::stat"))
	croak("method %s not called a %s object",
		"unpack","IPC::Semaphore::stat");
    if (len != sizeof(*data)) {
	croak("Bad arg length for %s, length is %d, should be %d",
		    "IPC::Semaphore::stat",
		    len, sizeof(*data));
    }
    sv_setiv(*av_fetch(list,0,TRUE), data[0].sem_perm.uid);
    sv_setiv(*av_fetch(list,1,TRUE), data[0].sem_perm.gid);
    sv_setiv(*av_fetch(list,2,TRUE), data[0].sem_perm.cuid);
    sv_setiv(*av_fetch(list,3,TRUE), data[0].sem_perm.cgid);
    sv_setiv(*av_fetch(list,4,TRUE), data[0].sem_perm.mode);
    sv_setiv(*av_fetch(list,5,TRUE), data[0].sem_ctime);
    sv_setiv(*av_fetch(list,6,TRUE), data[0].sem_otime);
    sv_setiv(*av_fetch(list,7,TRUE), data[0].sem_nsems);
    XSRETURN(1);
#else
    croak("System V semxxx is not implemented on this machine");
#endif
}

void
pack(obj)
    SV	* obj
PPCODE:
{
#ifdef HAS_SEM
    SV **sv_ptr;
    struct semid_ds ds;
    AV *list = (AV*)SvRV(obj);
    if(!sv_isa(obj, "IPC::Semaphore::stat"))
	croak("method %s not called a %s object",
		"pack","IPC::Semaphore::stat");
    if((sv_ptr = av_fetch(list,0,TRUE)) && *sv_ptr)
	ds.sem_perm.uid = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,1,TRUE)) && *sv_ptr)
	ds.sem_perm.gid = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,2,TRUE)) && *sv_ptr)
	ds.sem_perm.cuid = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,3,TRUE)) && *sv_ptr)
	ds.sem_perm.cgid = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,4,TRUE)) && *sv_ptr)
	ds.sem_perm.mode = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,5,TRUE)) && *sv_ptr)
	ds.sem_ctime = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,6,TRUE)) && *sv_ptr)
	ds.sem_otime = SvIV(*sv_ptr);
    if((sv_ptr = av_fetch(list,7,TRUE)) && *sv_ptr)
	ds.sem_nsems = SvIV(*sv_ptr);
    ST(0) = sv_2mortal(newSVpvn((char *)&ds,sizeof(ds)));
    XSRETURN(1);
#else
    croak("System V semxxx is not implemented on this machine");
#endif
}

MODULE=IPC::SysV	PACKAGE=IPC::SysV

void
ftok(path, id)
        char *          path
        int             id
    CODE:
#if defined(HAS_SEM) || defined(HAS_SHM)
        key_t k = ftok(path, id);
        ST(0) = k == (key_t) -1 ? &PL_sv_undef : sv_2mortal(newSViv(k));
#else
	Perl_die(aTHX_ PL_no_func, "ftok"); return;
#endif

void
SHMLBA()
    CODE:
#ifdef SHMLBA
    ST(0) = sv_2mortal(newSViv(SHMLBA));
#else
    croak("SHMLBA is not defined on this architecture");
#endif

BOOT:
{
    HV *stash = gv_stashpvn("IPC::SysV", 9, TRUE);
    /*
     * constant subs for IPC::SysV
     */
     struct { char *n; I32 v; } IPC__SysV__const[] = {
#ifdef GETVAL
        {"GETVAL", GETVAL},
#endif
#ifdef GETPID
        {"GETPID", GETPID},
#endif
#ifdef GETNCNT
        {"GETNCNT", GETNCNT},
#endif
#ifdef GETZCNT
        {"GETZCNT", GETZCNT},
#endif
#ifdef GETALL
        {"GETALL", GETALL},
#endif
#ifdef IPC_ALLOC
        {"IPC_ALLOC", IPC_ALLOC},
#endif
#ifdef IPC_CREAT
        {"IPC_CREAT", IPC_CREAT},
#endif
#ifdef IPC_EXCL
        {"IPC_EXCL", IPC_EXCL},
#endif
#ifdef IPC_GETACL
        {"IPC_GETACL", IPC_EXCL},
#endif
#ifdef IPC_LOCKED
        {"IPC_LOCKED", IPC_LOCKED},
#endif
#ifdef IPC_M
        {"IPC_M", IPC_M},
#endif
#ifdef IPC_NOERROR
        {"IPC_NOERROR", IPC_NOERROR},
#endif
#ifdef IPC_NOWAIT
        {"IPC_NOWAIT", IPC_NOWAIT},
#endif
#ifdef IPC_PRIVATE
        {"IPC_PRIVATE", IPC_PRIVATE},
#endif
#ifdef IPC_R
        {"IPC_R", IPC_R},
#endif
#ifdef IPC_RMID
        {"IPC_RMID", IPC_RMID},
#endif
#ifdef IPC_SET
        {"IPC_SET", IPC_SET},
#endif
#ifdef IPC_SETACL
        {"IPC_SETACL", IPC_SETACL},
#endif
#ifdef IPC_SETLABEL
        {"IPC_SETLABEL", IPC_SETLABEL},
#endif
#ifdef IPC_STAT
        {"IPC_STAT", IPC_STAT},
#endif
#ifdef IPC_W
        {"IPC_W", IPC_W},
#endif
#ifdef IPC_WANTED
        {"IPC_WANTED", IPC_WANTED},
#endif
#ifdef MSG_NOERROR
        {"MSG_NOERROR", MSG_NOERROR},
#endif
#ifdef MSG_FWAIT
        {"MSG_FWAIT", MSG_FWAIT},
#endif
#ifdef MSG_LOCKED
        {"MSG_LOCKED", MSG_LOCKED},
#endif
#ifdef MSG_MWAIT
        {"MSG_MWAIT", MSG_MWAIT},
#endif
#ifdef MSG_WAIT
        {"MSG_WAIT", MSG_WAIT},
#endif
#ifdef MSG_R
        {"MSG_R", MSG_R},
#endif
#ifdef MSG_RWAIT
        {"MSG_RWAIT", MSG_RWAIT},
#endif
#ifdef MSG_STAT
        {"MSG_STAT", MSG_STAT},
#endif
#ifdef MSG_W
        {"MSG_W", MSG_W},
#endif
#ifdef MSG_WWAIT
        {"MSG_WWAIT", MSG_WWAIT},
#endif
#ifdef SEM_A
        {"SEM_A", SEM_A},
#endif
#ifdef SEM_ALLOC
        {"SEM_ALLOC", SEM_ALLOC},
#endif
#ifdef SEM_DEST
        {"SEM_DEST", SEM_DEST},
#endif
#ifdef SEM_ERR
        {"SEM_ERR", SEM_ERR},
#endif
#ifdef SEM_R
        {"SEM_R", SEM_R},
#endif
#ifdef SEM_ORDER
        {"SEM_ORDER", SEM_ORDER},
#endif
#ifdef SEM_UNDO
        {"SEM_UNDO", SEM_UNDO},
#endif
#ifdef SETVAL
        {"SETVAL", SETVAL},
#endif
#ifdef SETALL
        {"SETALL", SETALL},
#endif
#ifdef SHM_CLEAR
        {"SHM_CLEAR", SHM_CLEAR},
#endif
#ifdef SHM_COPY
        {"SHM_COPY", SHM_COPY},
#endif
#ifdef SHM_DCACHE
        {"SHM_DCACHE", SHM_DCACHE},
#endif
#ifdef SHM_DEST
        {"SHM_DEST", SHM_DEST},
#endif
#ifdef SHM_ECACHE
        {"SHM_ECACHE", SHM_ECACHE},
#endif
#ifdef SHM_FMAP
        {"SHM_FMAP", SHM_FMAP},
#endif
#ifdef SHM_ICACHE
        {"SHM_ICACHE", SHM_ICACHE},
#endif
#ifdef SHM_INIT
        {"SHM_INIT", SHM_INIT},
#endif
#ifdef SHM_LOCK
        {"SHM_LOCK", SHM_LOCK},
#endif
#ifdef SHM_LOCKED
        {"SHM_LOCKED", SHM_LOCKED},
#endif
#ifdef SHM_MAP
        {"SHM_MAP", SHM_MAP},
#endif
#ifdef SHM_NOSWAP
        {"SHM_NOSWAP", SHM_NOSWAP},
#endif
#ifdef SHM_RDONLY
        {"SHM_RDONLY", SHM_RDONLY},
#endif
#ifdef SHM_REMOVED
        {"SHM_REMOVED", SHM_REMOVED},
#endif
#ifdef SHM_RND
        {"SHM_RND", SHM_RND},
#endif
#ifdef SHM_SHARE_MMU
        {"SHM_SHARE_MMU", SHM_SHARE_MMU},
#endif
#ifdef SHM_SHATTR
        {"SHM_SHATTR", SHM_SHATTR},
#endif
#ifdef SHM_SIZE
        {"SHM_SIZE", SHM_SIZE},
#endif
#ifdef SHM_UNLOCK
        {"SHM_UNLOCK", SHM_UNLOCK},
#endif
#ifdef SHM_W
        {"SHM_W", SHM_W},
#endif
#ifdef S_IRUSR
        {"S_IRUSR", S_IRUSR},
#endif
#ifdef S_IWUSR
        {"S_IWUSR", S_IWUSR},
#endif
#ifdef S_IRWXU
        {"S_IRWXU", S_IRWXU},
#endif
#ifdef S_IRGRP
        {"S_IRGRP", S_IRGRP},
#endif
#ifdef S_IWGRP
        {"S_IWGRP", S_IWGRP},
#endif
#ifdef S_IRWXG
        {"S_IRWXG", S_IRWXG},
#endif
#ifdef S_IROTH
        {"S_IROTH", S_IROTH},
#endif
#ifdef S_IWOTH
        {"S_IWOTH", S_IWOTH},
#endif
#ifdef S_IRWXO
        {"S_IRWXO", S_IRWXO},
#endif
	{Nullch,0}};
    char *name;
    int i;

    for(i = 0 ; (name = IPC__SysV__const[i].n) ; i++) {
	newCONSTSUB(stash,name, newSViv(IPC__SysV__const[i].v));
    }
}


--- NEW FILE: ChangeLog ---
Fri Jul  3 15:06:40 1998  Jarkko Hietaniemi  <jhi at iki.fi>

	- Integrated IPC::SysV 1.03 to Perl 5.004_69.

Change 142 on 1998/05/31 by <gbarr at pobox.com> (Graham Barr)

	- Changed SHMLBA from a constSUB to an XS sub as on some systems it is not
	  a constant
	- Added a missing MODULE line to SysV.xs so ftok is defined in IPC::SysV

Change 138 on 1998/05/23 by <gbarr at pobox.com> (Graham Barr)

	Applied patch from Jarkko Hietaniemi to add constats for UNICOS
	
	Reduced size of XS object by changing constant sub definition
	into a loop
	
	Updated POD to include ftok()

Change 135 on 1998/05/18 by <gbarr at pobox.com> (Graham Barr)

	applied changes from Jarkko Hietaniemi <jhi at iki.fi> to add
	new constants and ftok
	
	fixed to compile with >5.004_50
	
	surrounded newCONSTSUB with #ifndef as perl now defines this itself


--- NEW FILE: Msg.pm ---
# IPC::Msg.pm
#
# Copyright (c) 1997 Graham Barr <gbarr at pobox.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.

package IPC::Msg;

use IPC::SysV qw(IPC_STAT IPC_SET IPC_RMID);
use strict;
use vars qw($VERSION);
use Carp;

$VERSION = "1.02";
$VERSION = eval $VERSION;

{
    package IPC::Msg::stat;

    use Class::Struct qw(struct);

    struct 'IPC::Msg::stat' => [
	uid	=> '$',
	gid	=> '$',
	cuid	=> '$',
	cgid	=> '$',
	mode	=> '$',
	qnum	=> '$',
	qbytes	=> '$',
	lspid	=> '$',
	lrpid	=> '$',
	stime	=> '$',
	rtime	=> '$',
	ctime	=> '$',
    ];
}

sub new {
    @_ == 3 || croak 'new IPC::Msg ( KEY , FLAGS )';
    my $class = shift;

    my $id = msgget($_[0],$_[1]);

    defined($id)
	? bless \$id, $class
	: undef;
}

sub id {
    my $self = shift;
    $$self;
}

sub stat {
    my $self = shift;
    my $data = "";
    msgctl($$self,IPC_STAT,$data) or
	return undef;
    IPC::Msg::stat->new->unpack($data);
}

sub set {
    my $self = shift;
    my $ds;

    if(@_ == 1) {
	$ds = shift;
    }
    else {
	croak 'Bad arg count' if @_ % 2;
	my %arg = @_;
	$ds = $self->stat
		or return undef;
	my($key,$val);
	$ds->$key($val)
	    while(($key,$val) = each %arg);
    }

    msgctl($$self,IPC_SET,$ds->pack);
}

sub remove {
    my $self = shift;
    (msgctl($$self,IPC_RMID,0), undef $$self)[0];
}

sub rcv {
    @_ <= 5 && @_ >= 3 or croak '$msg->rcv( BUF, LEN, TYPE, FLAGS )';
    my $self = shift;
    my $buf = "";
    msgrcv($$self,$buf,$_[1],$_[2] || 0, $_[3] || 0) or
	return;
    my $type;
    ($type,$_[0]) = unpack("l! a*",$buf);
    $type;
}

sub snd {
    @_ <= 4 && @_ >= 3 or  croak '$msg->snd( TYPE, BUF, FLAGS )';
    my $self = shift;
    msgsnd($$self,pack("l! a*",$_[0],$_[1]), $_[2] || 0);
}


1;

__END__

=head1 NAME

IPC::Msg - SysV Msg IPC object class

=head1 SYNOPSIS

    use IPC::SysV qw(IPC_PRIVATE S_IRWXU);
    use IPC::Msg;

    $msg = new IPC::Msg(IPC_PRIVATE, S_IRWXU);

    $msg->snd(pack("l! a*",$msgtype,$msg));

    $msg->rcv($buf,256);

    $ds = $msg->stat;

    $msg->remove;

=head1 DESCRIPTION

A class providing an object based interface to SysV IPC message queues.

=head1 METHODS

=over 4

=item new ( KEY , FLAGS )

Creates a new message queue associated with C<KEY>. A new queue is
created if

=over 4

=item *

C<KEY> is equal to C<IPC_PRIVATE>

=item *

C<KEY> does not already  have  a  message queue
associated with it, and C<I<FLAGS> & IPC_CREAT> is true.

=back

On creation of a new message queue C<FLAGS> is used to set the
permissions.

=item id

Returns the system message queue identifier.

=item rcv ( BUF, LEN [, TYPE [, FLAGS ]] )

Read a message from the queue. Returns the type of the message read.
See L<msgrcv>.  The  BUF becomes tainted.

=item remove

Remove and destroy the message queue from the system.

=item set ( STAT )

=item set ( NAME => VALUE [, NAME => VALUE ...] )

C<set> will set the following values of the C<stat> structure associated
with the message queue.

    uid
    gid
    mode (oly the permission bits)
    qbytes

C<set> accepts either a stat object, as returned by the C<stat> method,
or a list of I<name>-I<value> pairs.

=item snd ( TYPE, MSG [, FLAGS ] )

Place a message on the queue with the data from C<MSG> and with type C<TYPE>.
See L<msgsnd>.

=item stat

Returns an object of type C<IPC::Msg::stat> which is a sub-class of
C<Class::Struct>. It provides the following fields. For a description
of these fields see you system documentation.

    uid
    gid
    cuid
    cgid
    mode
    qnum
    qbytes
    lspid
    lrpid
    stime
    rtime
    ctime

=back

=head1 SEE ALSO

L<IPC::SysV> L<Class::Struct>

=head1 AUTHOR

Graham Barr <gbarr at pobox.com>

=head1 COPYRIGHT

Copyright (c) 1997 Graham Barr. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut


--- NEW FILE: MANIFEST ---
MANIFEST
Makefile.PL
Msg.pm
README
Semaphore.pm
SysV.pm
SysV.xs
t/ipcsysv.t
t/msg.t
t/sem.t
ChangeLog

--- NEW FILE: README ---
Copyright (c) 1997 Graham Barr <gbarr at pobox.com>. All rights reserved.
This package is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

The SysV-IPC contains three packages

    IPC::Semaphore
    - Provides an object interface to using SysV IPC semaphores

    IPC::Msg
    - Provides an object interface to using SysV IPC messages

    IPC::SysV
    - Provides the constants required to use the system SysV IPC calls.

Currently there is not object support for SysV shared memory, but
SysV::SharedMem is a project for the future.

Share and enjoy!


--- NEW FILE: Semaphore.pm ---
# IPC::Semaphore
#
# Copyright (c) 1997 Graham Barr <gbarr at pobox.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.

package IPC::Semaphore;

use IPC::SysV qw(GETNCNT GETZCNT GETVAL SETVAL GETPID GETALL SETALL
		 IPC_STAT IPC_SET IPC_RMID);
use strict;
use vars qw($VERSION);
use Carp;

$VERSION = "1.02";
$VERSION = eval $VERSION;

{
    package IPC::Semaphore::stat;

    use Class::Struct qw(struct);

    struct 'IPC::Semaphore::stat' => [
	uid	=> '$',
	gid	=> '$',
	cuid	=> '$',
	cgid	=> '$',
	mode	=> '$',
	ctime	=> '$',
	otime	=> '$',
	nsems	=> '$',
    ];
}

sub new {
    @_ == 4 || croak 'new ' . __PACKAGE__ . '( KEY, NSEMS, FLAGS )';
    my $class = shift;

    my $id = semget($_[0],$_[1],$_[2]);

    defined($id)
	? bless \$id, $class
	: undef;
}

sub id {
    my $self = shift;
    $$self;
}

sub remove {
    my $self = shift;
    (semctl($$self,0,IPC_RMID,0), undef $$self)[0];
}

sub getncnt {
    @_ == 2 || croak '$sem->getncnt( SEM )';
    my $self = shift;
    my $sem = shift;
    my $v = semctl($$self,$sem,GETNCNT,0);
    $v ? 0 + $v : undef;
}

sub getzcnt {
    @_ == 2 || croak '$sem->getzcnt( SEM )';
    my $self = shift;
    my $sem = shift;
    my $v = semctl($$self,$sem,GETZCNT,0);
    $v ? 0 + $v : undef;
}

sub getval {
    @_ == 2 || croak '$sem->getval( SEM )';
    my $self = shift;
    my $sem = shift;
    my $v = semctl($$self,$sem,GETVAL,0);
    $v ? 0 + $v : undef;
}

sub getpid {
    @_ == 2 || croak '$sem->getpid( SEM )';
    my $self = shift;
    my $sem = shift;
    my $v = semctl($$self,$sem,GETPID,0);
    $v ? 0 + $v : undef;
}

sub op {
    @_ >= 4 || croak '$sem->op( OPLIST )';
    my $self = shift;
    croak 'Bad arg count' if @_ % 3;
    my $data = pack("s!*", at _);
    semop($$self,$data);
}

sub stat {
    my $self = shift;
    my $data = "";
    semctl($$self,0,IPC_STAT,$data)
	or return undef;
    IPC::Semaphore::stat->new->unpack($data);
}

sub set {
    my $self = shift;
    my $ds;

    if(@_ == 1) {
	$ds = shift;
    }
    else {
	croak 'Bad arg count' if @_ % 2;
	my %arg = @_;
	$ds = $self->stat
		or return undef;
	my($key,$val);
	$ds->$key($val)
	    while(($key,$val) = each %arg);
    }

    my $v = semctl($$self,0,IPC_SET,$ds->pack);
    $v ? 0 + $v : undef;
}

sub getall {
    my $self = shift;
    my $data = "";
    semctl($$self,0,GETALL,$data)
	or return ();
    (unpack("s!*",$data));
}

sub setall {
    my $self = shift;
    my $data = pack("s!*", at _);
    semctl($$self,0,SETALL,$data);
}

sub setval {
    @_ == 3 || croak '$sem->setval( SEM, VAL )';
    my $self = shift;
    my $sem = shift;
    my $val = shift;
    semctl($$self,$sem,SETVAL,$val);
}

1;

__END__

=head1 NAME

IPC::Semaphore - SysV Semaphore IPC object class

=head1 SYNOPSIS

    use IPC::SysV qw(IPC_PRIVATE S_IRWXU IPC_CREAT);
    use IPC::Semaphore;

    $sem = new IPC::Semaphore(IPC_PRIVATE, 10, S_IRWXU | IPC_CREAT);

    $sem->setall( (0) x 10);

    @sem = $sem->getall;

    $ncnt = $sem->getncnt;

    $zcnt = $sem->getzcnt;

    $ds = $sem->stat;

    $sem->remove;

=head1 DESCRIPTION

A class providing an object based interface to SysV IPC semaphores.

=head1 METHODS

=over 4

=item new ( KEY , NSEMS , FLAGS )

Create a new semaphore set associated with C<KEY>. C<NSEMS> is the number
of semaphores in the set. A new set is created if

=over 4

=item *

C<KEY> is equal to C<IPC_PRIVATE>

=item *

C<KEY> does not already  have  a  semaphore  identifier
associated with it, and C<I<FLAGS> & IPC_CREAT> is true.

=back

On creation of a new semaphore set C<FLAGS> is used to set the
permissions.

=item getall

Returns the values of the semaphore set as an array.

=item getncnt ( SEM )

Returns the number of processes waiting for the semaphore C<SEM> to
become greater than its current value

=item getpid ( SEM )

Returns the process id of the last process that performed an operation
on the semaphore C<SEM>.

=item getval ( SEM )

Returns the current value of the semaphore C<SEM>.

=item getzcnt ( SEM )

Returns the number of processes waiting for the semaphore C<SEM> to
become zero.

=item id

Returns the system identifier for the semaphore set.

=item op ( OPLIST )

C<OPLIST> is a list of operations to pass to C<semop>. C<OPLIST> is
a concatenation of smaller lists, each which has three values. The
first is the semaphore number, the second is the operation and the last
is a flags value. See L<semop> for more details. For example

    $sem->op(
	0, -1, IPC_NOWAIT,
	1,  1, IPC_NOWAIT
    );

=item remove

Remove and destroy the semaphore set from the system.

=item set ( STAT )

=item set ( NAME => VALUE [, NAME => VALUE ...] )

C<set> will set the following values of the C<stat> structure associated
with the semaphore set.

    uid
    gid
    mode (only the permission bits)

C<set> accepts either a stat object, as returned by the C<stat> method,
or a list of I<name>-I<value> pairs.

=item setall ( VALUES )

Sets all values in the semaphore set to those given on the C<VALUES> list.
C<VALUES> must contain the correct number of values.

=item setval ( N , VALUE )

Set the C<N>th value in the semaphore set to C<VALUE>

=item stat

Returns an object of type C<IPC::Semaphore::stat> which is a sub-class of
C<Class::Struct>. It provides the following fields. For a description
of these fields see your system documentation.

    uid
    gid
    cuid
    cgid
    mode
    ctime
    otime
    nsems

=back

=head1 SEE ALSO

L<IPC::SysV> L<Class::Struct> L<semget> L<semctl> L<semop> 

=head1 AUTHOR

Graham Barr <gbarr at pobox.com>

=head1 COPYRIGHT

Copyright (c) 1997 Graham Barr. All rights reserved.
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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