GameMonkeyScript/gmsrc/doc/tutorial/2-continuing/scripts/blocking_05.gm

/*
  Basic blocking and signalling #5
*/

global blockfunc = function(name)
{
	print( name + ", waiting for instruction, sir!" );
	signal_received = block("attack", "move", "defend");
	if(signal_received == "attack")
	{
		print(name + " is attacking!");
	}
	else if (signal_received == "move")
	{
		print(name + " is moving to position!");
	}
	else if (signal_received == "defend")
	{
		print(name + " is defending til the death!");
	}
};

thread_1 = thread( blockfunc, "woob" );
thread_2 = thread( blockfunc, "foo" );
sleep(1);
signal("attack", thread_1);
signal("defend", thread_2);