libevent 绑定读事件无效的问题？

sayliu 更新于2019-10-30

想自己了解了异步编程的流程，写的demo 里libevent 绑定读事件无效的问题，大门帮看下？？
server.php

<?php
$soc = stream_socket_server('tcp://0.0.0.0:2032');
var_dump($soc);
stream_set_blocking($soc, 0);

$eventBase = event_base_new();
$event = event_new();
event_set($event, $soc, EV_READ | EV_PERSIST, 'accpet', null);
event_base_set($event, $eventBase);
event_add($event);
event_base_loop($eventBase);

function accpet() {
    global $soc;
    global $eventBase;
    $new_soc = stream_socket_accept($soc, 0, $remote_ip);
    stream_set_blocking($new_soc, 0);

    // while ($str = fread($new_soc, 1024)) {
    //     error_log($str.'------111');
    // }
    if (is_resource($new_soc)) {
        $event = event_new();
        $ret1 = event_set($event, $new_soc, EV_READ | EV_PERSIST, 'evread', null);
        $ret2 = event_base_set($event, $eventBase);
        $ret3 = event_add($event);

    }
}

function evread() {
    error_log(1111111);
}

client.php

<?php

$errno = '';
$errmsg = '';

$soc = stream_socket_client('tcp://0.0.0.0:2032', $errno, $errmsg, 10, STREAM_CLIENT_CONNECT | STREAM_CLIENT_PERSISTENT);
stream_set_blocking($soc, 0);
if (empty($soc)) {
    echo $errno.'-----'.$errmsg.PHP_EOL;
} else {
$ret = fwrite($soc, "asdasdasdadeeeeeeeee\r\n");
var_dump($ret);
}

当client.php 向 $soc里写入数据的时候，server.php利用fread($new_soc, 1024)是可以读出数据的，但用异步的方式后，流程并没有走到evread函数了，哪位懂的能帮解释下，谢了

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1个回答

sayliu 2017-04-12

自答。发现只要加一个全局变量events，然后在accpet里将 event赋值给events 就行了。然后具体原因还没找到...

<?php
$soc = stream_socket_server('tcp://0.0.0.0:2032');
stream_set_blocking($soc, 0);
$eventBase = event_base_new();
$event = event_new();
$events = [];
function evread($socket, $flag) {
    $str = fread($socket, 1024);
    if (strlen($str) > 0) {
        fwrite($socket, $str);
    }
}

function accpet($soc, $flag, $base) {
    global $events;
    $new_soc = stream_socket_accept($soc);
    stream_set_blocking($new_soc, 0);
    $event = event_new();
    event_set($event, $new_soc, EV_READ | EV_PERSIST, 'evread', $base);
    event_base_set($event, $base);
    event_add($event);
    $events[] = $event;
}

event_set($event, $soc, EV_READ | EV_PERSIST, 'accpet', $eventBase);
event_base_set($event, $eventBase);
event_add($event);
event_base_loop($eventBase);