posix_getpid

<?php         });



        $this->loop->futureTick(function () {

            posix_kill(posix_getpid(), SIGUSR1);

        });



        $this->loop->run();

<?php         $this->loop->addSignal(SIGUSR1, $func);



        $this->loop->addTimer(0.4, function () {

            posix_kill(posix_getpid(), SIGUSR1);

        });

        $loop = $this->loop;

        $this->loop->addTimer(0.9, function () use (&$func, $loop) {

<?php     protected function forkSendSignal($signal)

    {

        $currentPid = posix_getpid();

        $childPid = pcntl_fork();

        if ($childPid == -1) {

            $this->fail("Failed to fork child process!");