PHP中使用pcntl和libevent实现Timer功能

<?php  

  

function newChild($func_name) {  

    echo "enter newChild\n";  

    $args = func_get_args();  

    unset($args[0]);  

    $pid =  pcntl_fork();  

    if ($pid == 0) {  

        function_exists($func_name) and exit(call_user_func_array($func_name, $args)) or exit(-1);  

    } else if($pid == -1) {  

        echo "Couldn't create child process";  

    } else {  

        return $pid;  

    }  

}  

  

  

function on_timer() {  

    echo "timer called\n";  

}  

  

  

/** 

 * @param $func string, function name 

 * @param $timeouts int, microtimes for time delay 

 */  

function timer($func, $timeouts){  

  

  

    echo "enter timer\n";  

    $base = event_base_new();  

    $event = event_new();  

  

  

    event_set($event, 0, EV_TIMEOUT, $func);  

    event_base_set($event, $base);  

    event_add($event, $timeouts);  

  

  

    event_base_loop($base);  

}  

  

  

$pid = newChild("timer", "on_timer", 5000000);  

  

  

if ($pid > 0) {  

    echo "master process exit\n";  

}