/usr/share/perl5/AMC/Queue.pm is in auto-multiple-choice-common 1.3.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2008-2010,2012 Alexis Bienvenue <paamc@passoire.fr>
#
# This file is part of Auto-Multiple-Choice
#
# Auto-Multiple-Choice is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 2 of
# the License, or (at your option) any later version.
#
# Auto-Multiple-Choice is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Auto-Multiple-Choice. If not, see
# <http://www.gnu.org/licenses/>.
package AMC::Queue;
use AMC::Basic;
use Module::Load;
use Module::Load::Conditional qw/check_install/;
# recupere le nombre de CPU, avec Sys::CPU si ce module est installe
sub get_ncpu {
my $n=0;
if(check_install(module=>"Sys::CPU")) {
load("Sys::CPU");
debug_pm_version("Sys::CPU");
$n=Sys::CPU::cpu_count();
} else {
open(CI,"/proc/cpuinfo");
while(<CI>) {
$n++ if(/^processor\s*:/);
}
close(CI);
}
$n=1 if($n<=0);
return($n);
}
sub new {
my (%o)=@_;
my $self={'pids'=>[],
'queue'=>[],
'max.procs'=>0,
};
for my $k (keys %o) {
$self->{$k}=$o{$k} if(defined($self->{$k}));
}
if($self->{'max.procs'}<1) {
$self->{'max.procs'}=get_ncpu();
debug "Max number of processes: ".$self->{'max.procs'};
}
bless $self;
return($self);
}
sub add_process {
my ($self,@o)=@_;
push @{$self->{'queue'}},[@o];
}
sub maj {
my ($self)=@_;
my @p=();
for my $pid (@{$self->{'pids'}}) {
push @p,$pid if(kill(0,$pid));
}
@{$self->{'pids'}}=@p;
debug "MAJ : ".join(' ',@p);
return(1+$#{$self->{'pids'}});
}
sub killall {
my ($self)=@_;
$self->{'queue'}=[];
print "Queue interruption\n";
for my $p (@{$self->{'pids'}}) {
print "Queue: killing $p\n";
kill 9,$p;
}
}
sub run {
my ($self,$subsys)=@_;
debug "Queue RUN";
while(@{$self->{'queue'}}) {
while($self->maj() < $self->{'max.procs'}
&& @{$self->{'queue'}}) {
my $cs=shift(@{$self->{'queue'}});
if($cs) {
my $p=fork();
if($p) {
debug "Fork : $p";
push @{$self->{'pids'}},$p;
} else {
if(ref($cs->[0]) eq 'ARRAY') {
for my $c (@$cs) {
debug "Command [$$] : ".join(' ',@$c);
if(system(@$c)==0) {
debug "Command [$$] OK";
} else {
debug "Error [$$] : $?\n";
}
}
exit(0);
} elsif(ref($cs->[0]) eq 'CODE') {
my $c=shift @$cs;
&$c(@$cs);
exit(0);
} else {
debug "Command [$$] : ".join(' ',@$cs);
exec(@$cs);
debug "Bad exec $$ [".$cs->[0]."] unknown command";
die "Unknown command";
}
}
} else {
debug "Queue empty";
}
}
waitpid(-1,0);
}
while($self->maj()) {
debug("Waiting for all childs to end...");
waitpid(-1,0);
}
debug("Leaving queue.");
}
1;
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