<?php
/
Copyright (C) Iamasb
@project : 3、workerman干系知识点
@explain : 进程间通信-旗子暗记量+共享内存
多进程-通过行列步队
创建两个子进程-卖力对共享内容进行写操作
主进程卖力检测子进程状态
@filename : 32、进程间通信-旗子暗记量+共享内存.php
@author : xiaobei 2801616735@qq.com
/
$key = ftok(__FILE__,'m');
$semId = sem_get($key);
$shmId = shm_attach($key);
define('KEY',1);
/
累加1
先获取信号量
再操作共享内存
/
function toDo()
{
global $semId,$shmId;
if (!sem_acquire($semId)) {
echo 'get sem is error';
exit;
}
if (shm_has_var($shmId,KEY)) {
$value = shm_get_var($shmId,KEY);
echo \"大众value is \"大众,$value,PHP_EOL;
$value++;
shm_put_var($shmId,KEY,$value);
} else {
shm_put_var($shmId,KEY,1);
echo \"大众value is 0\公众,PHP_EOL;
}
sem_release($semId);
exit;
}
function forkPorcess($callBack)
{
$pid = pcntl_fork();
if ($pid<0) {
echo 'fork is error.';
} elseif ($pid>0) {
return $pid;
}
$callBack();
}
for ($i=0;$i<3;$i++) {
$pid = forkPorcess('toDo');
$pidArr[$pid] = $pid;
}
print_r($pidArr);
while (1) {
$pid = pcntl_wait($status,WUNTRACED);
if (isset($pidArr[$pid])) {
echo $pid,' is over.',PHP_EOL;
unset($pidArr[$pid]);
} else {
echo \"大众master is over.\公众;
break;
}
}
// 移除旗子暗记量
sem_remove($semId);
// 移除共享内存数据
shm_remove($shmId);
// 断开共享内存
shm_detach($shmId);
2.2、实行结果
