}
// we want 3 jobs in parallel instead of the default 2
$TQ = new ThreadQueue("class1::parallel_task", 3);
// add tasks
$TQ->add("one");
$TQ->add("two");
$TQ->add("three");
$TQ->add("four");
$TQ->add("five");
$TQ->add("six");
// Oops! We changed our mind, let's remove awaiting jobs.
// Existing threads will run, but jobs not started will be removed.
$TQ->flush();
// let's add jobs again.
$TQ->add("seven");
$TQ->add("eight");
$TQ->add("nine");
$TQ->add("ten");
$TQ->add("eleven");
$TQ->add("twelve");
// wait until all threads exit
while ($numberOfThreads = count($TQ->threads())) {
usleep(500000);
// optional
echo "waiting for all ({$numberOfThreads}) jobs done...\n";
$TQ->tick();
// mandatory!
// ha-ha! we can change the number of parallel executions realtime.
$TQ->queueSize = 4;
}
echo "all process finished.\n";
Basic usage
for beginners: it is for command-line only execution. Webservers do not support threads.
*/
require_once "ThreadQueue.php";
// it is the function that will be called several times
function parallel_task($arg)
{
echo "task with parameter '{$arg}' starts\n";
sleep(rand(2, 5));
// wait for random seconds
echo "task with parameter '{$arg}' ENDS\n";
}
// create a queue instance with a callable function name
$TQ = new ThreadQueue("parallel_task");
// add tasks
$TQ->add("one");
$TQ->add("two");
$TQ->add("three");
$TQ->add("four");
$TQ->add("five");
// wait until all threads exit
while (count($TQ->threads())) {
// there are existing processes in the background?
sleep(1);
// optional
echo "waiting for all jobs done...\n";
$TQ->tick();
// mandatory!
}
echo "all process finished.\n";
