php lock_nb 单进程,php多线程实现多进程 跨平台的一例代码 - is_resource

/**

* @copyright 2007 movivi

* @author 徐智 *

* $Id: getPage.php 11 2007-09-21 02:15:01Z fred $

* modify by bbs.it-home.org

*/

if (!defined('DIR_PHP_EXEC')) define('DIR_PHP_EXEC', 'php');

//if (!defined('DIR_MAIN_EXEC')) define('DIR_MAIN_EXEC', '');

if (!defined('DIR_TMP')) define('DIR_TMP', '');

/********/

/* 初始化 */

define('CMD_MAIN_PROCESS_KEY', 'main_process_key');

define('CMD_CHILD_PROCESS_NAME', 'child_process_name');

define('CMD_CHILD_PROCESS_PARAM', 'child_process_param');

function init_my_process() {

$GLOBALS['gal_obj_cmd'] = new my_cmd_argv();

$key = $GLOBALS['gal_obj_cmd']->get_value(CMD_MAIN_PROCESS_KEY);

$key = $key === false ? '' : $key;

$GLOBALS['gal_obj_process_m'] = new my_process_m($key);

if (!$GLOBALS['gal_obj_process_m']->is_main()) $GLOBALS['gal_obj_process_m']->run() ;

}

/**

* php多进程类

*

* 你需要从这个对象继承，然后实现你自己的run处理

*/

abstract class my_process_base {

public function __construct($auto_run=true, $name='') {

}

public function __destruct() {

echo "@endn";

}

abstract public function run($param = null);

}

class my_cmd_argv {

private $cmd_argv = array();

public function __construct() {

$argv = $_SERVER['argv'];

for ($i = 1; $i < count($argv); $i++) {

$cmd = explode('=', $argv[$i]);

$this->cmd_argv[$cmd[0]] = isset($cmd[1]) ? $cmd[1] : '';

}

}

public function get_key($key) {

return isset($this->cmd_argv[$key]);

}

public function get_value($key) {

return isset($this->cmd_argv[$key]) ? $this->cmd_argv[$key] : false;

}

}

/**

* php多进程管理类

* 可以在PHP中实现多进程处理，只限在控制台方式使用

* 当前的信号实现机制采用文件方式

*

*/

class my_process_m {

/**

* @var array $task_list

* 进程列表

*/

private $task_list = array();

private $lock_list = array();

private $lock = null;

private $is_main = false;

private $max_run = 3600000;

private function release_lock($key = null) {

$lock = &$this->lock_list;

if (!is_null($key)) {

$key = md5($this->build_lock_id($key));

if (isset($lock[$key])) {

if (is_resource($lock[$key][0])) fclose($lock[$key][0]);

unlink($lock[$key][1]);

unset($lock[$key]);

}

return true;

}

foreach ($lock as $k => $h) {

if (is_resource($h)) fclose($h);

unset($lock[$k]);

}

return true;

}

private function release_task($key = null) {

$task = &$this->task_list;

if (!is_null($key) && isset($task[$key])) {

if (is_resource($task[$key])) pclose($task[$key]);

unset($task[$key]);

} else {

foreach ($task as $k => $h) {

if (is_resource($h)) pclose($h);

unset($task[$k]);

}

}

return true;

}

private function build_lock_id($key) {

return DIR_TMP . DIRECTORY_SEPARATOR . $key . '_sem.lock';

}

protected function run_child_process() {

$class = $GLOBALS['gal_obj_cmd']->get_value(CMD_CHILD_PROCESS_NAME);

$param = $GLOBALS['gal_obj_cmd']->get_value(CMD_CHILD_PROCESS_PARAM);

$param = $param == '' ? null : unserialize(base64_decode(trim($param)));

$obj = new $class();

$obj->run($param);

$this->task_list[] = $obj;

}

public function __construct($lock='') {

if ($lock === '') {

$this->is_main = true;

$key = md5(uniqid()) . '_main.my_process';

$lock = array($key, $this->get($key));

} else {

$this->is_main = false;

$lock = array($lock, 0);

}

$this->lock = $lock;

}

public function __destruct() {

$this->release_lock();

$this->release_task();

}

/**

* 停止所有进程

*

*/

public function stop_all() {

}

/**

* 是否是主进程

*

*/

public function is_main() {

return $this->is_main;

}

/**

* 是不是已经存在一个活动信号

*

* @param string $key

* @return bool

*/

public function exist($key) {

return file_exists($this->build_lock_id($key));

}

/**

* 获取一个信号

*

* @param string $key

* @param int $max_acquire 最大请求阻塞数量

* @return mix 如果成功返回一个信号ID

*

*/

public function get($key, $max_acquire=5) {

$fn = $this->build_lock_id($key);

if (isset($this->lock_list[md5($fn)])) return false;

$id = fopen($fn, 'a+');

if ($id) $this->lock_list[md5($fn)] = array($id, $fn);

return $id;

}

/**

* 释放一个信号

*

* @param string $key

* @return bool 如果成功返回一个信号true

*

*/

public function remove($key) {

return $this->release_lock($key);

}

/**

* 获取一个信号

*

* @param string $id 信号ID

* @param bool $block 是否阻塞

*/

public function acquire($id, $block=false) {

if ($block) {

return flock($id, LOCK_EX);

} else {

return flock($id, LOCK_EX + LOCK_NB);

}

}

/**

* 释放一个信号

*

*/

public function release($id) {

flock($id, LOCK_UN);

}

public function run_task($process_name, $param=null) {

$this->task_list[] = popen(DIR_PHP_EXEC . ' -f ' . DIR_MAIN_EXEC . ' -- '

. CMD_CHILD_PROCESS_NAME . '=' . $process_name . ' '

. CMD_CHILD_PROCESS_PARAM . '="' . base64_encode(serialize($param)) . '" '

. CMD_MAIN_PROCESS_KEY . '="' . $this->lock[0] . '" ',

'r');

}

public function run($auto_run = true) {

if ($this->is_main) {

$ps = &$this->task_list;

$max_run = &$this->max_run;

$id = 0;

do {

//echo "process-------------: n";

$c = 0;

foreach ($ps as $k => $h) {

$c++;

$msg = fread($h, 8000);

if (substr($msg, -5, 4) === '@end') {

echo "end process:[$k][$id] echo n{$msg} n";

$this->release_task($k);

} else {

echo "process:[$k][$id] echo n{$msg} n";

}

}

sleep(1);

} while ($auto_run && $id++ < $max_run && $c > 0);

} else {

$this->run_child_process();

}

}

public function set_max_run($max=1000) {

$this->max_run = $max;

}

}

?>