Description:
------------
The test script below works with timeouts of 10ms or 1sec, but doesn't work with timeouts of 100ms or 500ms, Cond::wait returns much faster then expected.


Test script:
---------------
class Test extends Thread
{
	private $mutex, $cond;

	public function __construct()
	{
		$this->mutex = Mutex::create( true );
		$this->cond = Cond::create();
	}
	
	public function __destruct()
	{
		Cond::destroy( $this->cond );
		Mutex::unlock( $this->mutex );
		Mutex::destroy( $this->mutex );
	}
	
	public function run()
	{
		while( true ) {
			trace( "test", "running" );
			if( @ Cond::wait( $this->cond, $this->mutex, 500000 ) )
				break;
		}
		echo "stopped\n";
	}
	
	public function stop()
	{
		Cond::signal( $this->cond );
		$this->join();
	}
}

$test = new Test();
$test->start();
sleep( 5 );
$test->stop();

function trace( $sender, $msg )
{
	$ts = microtime( true );
	echo date( 'd/m H:i:s', $ts ), substr( sprintf( "%.6f", $ts - (int) $ts ), 1 ), ' ', $sender, ': ', $msg, "\n";
}


Expected result:
----------------
Waiting for the given timeout.

Actual result:
--------------
Seems to return immediately but much faster from Cond::wait with some timeouts.