Mass Deface
[
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($$self,$sem,GETPID,0);
$v ? 0 + $v : undef;
}
sub op {
@_ >= 4 || croak '$sem->op( OPLIST )';
my $self = shift;
croak 'Bad arg count' if @_ % 3;
my $data = pack("s$N*",@_);
semop($$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($$self,0,GETALL,$data)
or return ();
(unpack("s$N*",$data));
}
sub setall {
my $self = shift;
my $data = pack("s$N*",@_);
semctl($$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_IRUSR S_IWUSR IPC_CREAT);
use IPC::Semaphore;
$sem = IPC::Semaphore->new(IPC_PRIVATE, 10, S_IRUSR | S_IWUSR | 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