/**
* fork process
*
* @param callable $callable
* @param array $args
* @param string $tag
* @return int $pid forked PID of forked child process
* @throws RuntimeException
*/
public function fork($callable, $args = array(), $tag = null, Snidel_Token $token = null)
{
$token = $token ? $token : $this->token;
if (!is_array($args)) {
$args = array($args);
}
$pid = pcntl_fork();
if (-1 === $pid) {
$message = 'could not fork a new process';
$this->error($message);
throw new RuntimeException($message);
} elseif ($pid) {
// parent
$this->info('created child process. pid: ' . $pid);
$this->childPids[] = $pid;
if ($tag !== null) {
$this->tagsToPids[$tag][] = $pid;
}
} else {
// child
foreach ($this->signals as $sig) {
pcntl_signal($sig, SIG_DFL, true);
}
$this->info('waiting for the token to come around.');
if ($token->accept()) {
$this->info('started the function.');
$ret = call_user_func_array($callable, $args);
$this->info('completed the function.');
$data = new Snidel_Data(getmypid());
try {
$data->write($ret);
} catch (RuntimeException $e) {
throw $e;
}
$token->back();
}
$this->_exit();
}
return $pid;
}
/**
* @test
*/
public function writeAndRead()
{
$data = new Snidel_Data(getmypid());
$data->write('foo');
$this->assertSame($data->readAndDelete(), 'foo');
}
