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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