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[PHP]Swoole协程

  • 2026-02-10 03:00:59
[PHP]Swoole协程

Swoole协程

简介

官方文档

https://wiki.swoole.com/zh-cn/#/coroutine

从4.0版本开始提供完整的协程和通道的特性,开发者不需要使用yield,且提供完善的客户端。

协程容器和主进程代码是同步堵塞,协程容器内异步不堵塞。

使用Coroutine\WaitGroup或Coroutine\Barrier可等待协程容器内部都结束之后,继续操作。

协程间的消息队列channel,使用push和pop处理消息,无法跨进程。

协程容器可以通过Coroutine::create或者go()创建。

Swoole 协程调度器                                                协程1 ───┐                                                  |→ 遇到I/O操作 → 让出CPU → 调度器选择     协程2 ───┘                                          I/O 完成 → 唤醒协程 → 继续执行                        

一个TCP链接仅允许一个协程读、一个协程写,多个协程进行读或写操作会报错[1]

创建

所有的协程必须在协程容器里面创建。

部分协程化的类可使用短命名,php.ini 设置 swoole.use_shortname=On/Off来开启/关闭短名,默认为开启。

类名
短命名
Swoole\Coroutine\Server
Co\Server
Swoole\Http\Server
Co\Http\Server
Swoole\Coroutine\Socket
Co\Socket
Swoole\Coroutine::create
go()
Swoole\Coroutine::defer
defer()

协程HTTP服务端

use Swoole\Coroutine;Co\run(function () {$host = "0.0.0.0";$port = "80";    //不使用ssl$server = new Co\Http\Server($host$portfalse);    //注册路由及回调$server->handle('/'function ($request$response) {$response->end("<h1>Index</h1>");    });$server->handle('/stop'function ($request$response) use ($server) {$response->end("<h1>Stop</h1>");$server->shutdown();    });$server->start();});

TCP和WebSocket客户端参考官网。

文件异步操作

  Co\run(function () {$file = "../data/test.txt";    go(function () use ($file) {echo"睡眠 0.2 秒" . PHP_EOL;        Co\System::sleep(0.2);$r = Co\System::writeFile($file"\n this is a test\n", FILE_APPEND);        var_dump($r);    });    go(function () use ($file) {        var_dump(Co\System::statvfs($file));$r = Co\System::readFile($file);        var_dump($r);    });});

运行结果

睡眠 0.2 秒array(11) {  ["bsize"]=>  int(4096)  ["frsize"]=>  int(4096)  ["blocks"]=>  int(159028479)  ["bfree"]=>  int(12279418)  ["bavail"]=>  int(12279418)  ["files"]=>  int(999)  ["ffree"]=>  int(1000000)  ["favail"]=>  int(1000000)  ["fsid"]=>  int(1)  ["flag"]=>  int(1024)  ["namemax"]=>  int(255)}string(19) "11111this is a test"int(17)

通讯

协程之间使用Coroutine\Channel实现通讯,Coroutine\WaitGroup基于Channel实现增加、完整、等待完成。

Coroutine\Barrier协程屏障是Swoole Library提供的便携协程并发管理工具,基于PHP计数和 Coroutine API 实现,比WaitGroup更简单。

使用WaitGroup

  Co\run(function () {$wg = new WaitGroup();$channel = new Channel(1);$wg->add();    go(function () use ($channel$wg) {$cid = Co::getCid();$str = "cid:" . $cid;$msg = "this is test";        var_dump($str . " sleep 3");        Co\System::sleep(3);        var_dump($str . " push msg:" . $msg);$channel->push(['msg' => $msg]);$wg->done();    });$wg->add();    go(function () use ($channel$wg) {$cid = Co::getCid();$str = "cid:" . $cid;        //设置超时时间if ($msg = $channel->pop(2)) {            var_dump($str . " " . $msg);        } else {            var_dump($str . " pop msg timeout");        }        var_dump($str . " sleep 5");        Co\System::sleep(5);$wg->done();    });$wg->wait();    var_dump("all Coroutine done");});

运行结果

string(13) "cid:2 sleep 3"string(21) "cid:3 pop msg timeout"string(13) "cid:3 sleep 5"string(27) "cid:2 push msg:this is test"string(18) "all Coroutine done"

使用Barrier,与上述执行代码效果相同。

 Co\run(function () {$barrier = Barrier::make();$channel = new Channel(1);    go(function () use ($channel$barrier) {$cid = Co::getCid();$str = "cid:" . $cid;$msg = "this is test";        var_dump($str . " sleep 3");        Co\System::sleep(3);        var_dump($str . " push msg:" . $msg);$channel->push(['msg' => $msg]);    });    go(function () use ($channel$barrier) {$cid = Co::getCid();$str = "cid:" . $cid;        //设置超时时间if ($msg = $channel->pop(2)) {            var_dump($str . " " . $msg);        } else {            var_dump($str . " pop msg timeout");        }        var_dump($str . " sleep 5");        Co\System::sleep(5);    });    Barrier::wait($barrier);    var_dump("all Coroutine done");});

全局变量

禁止使用类静态变量 Class::$array、全局对象属性 $object->array、其他超全局变量 $GLOBALS 等。

多协程使用全局变量,在每个协程中都会对其修改,所以使用全局变量在协程中可能会得到错误数据。

对上下文对象中的对象进行设置和获取,实现全局变量,也可以使用Swoole\Table配合行锁。

Swoole\Table是一个基于共享内存和锁实现的超高性能,并发数据结构。用于解决多进程/多线程数据共享和同步加锁问题。

Table的内存容量不受PHPmemory_limit限制,一定要使用文档中提供的 API 来进行操作。

锁分类:

  • 非协程锁Swoole\Lock多线程使用Swoole\Thread\Lock,协程中不可使用。
  • 协程锁Swoole\Coroutine\Lock,加锁和解锁必须在同一个协程中进行,否则会导致静态条件被破坏。

原子计数器Swoole\Atomic32位无符号整型,64位使用Swoole\Atomic\Long,多线程使用Swoole\Thread\AtomicSwoole\Thread\Atomic\Long

 Co\run(function () {$atomic = new Swoole\Atomic();$lock = new Swoole\Coroutine\Lock();$wg = new WaitGroup();$table = new Swoole\Table(1024);$table->column('id', Swoole\Table::TYPE_INT);$table->column('name', Swoole\Table::TYPE_STRING, 64);$table->create();$count = 2;for ($i = 0; $i < $count$i++) {$wg->add();        go(function () use ($i$wg$atomic$lock$table) {            //协程锁$lock->lock();            //计数器$atomic->add();$id = $atomic->get();            //table$item = ['id' => $id,'name' => "name_" . $id,            ];$table->set($i$item);            //协程锁$lock->unlock();$wg->done();        });    }for ($i = 0; $i < $count$i++) {$s = $count + 1 - $i;$wg->add();        go(function () use ($i$s$table$wg) {            var_dump("sleep time:" . $s . " get " . $i);            Co\System::sleep($s);$info = $table->get($i);            var_dump($info);$wg->done();        });    }$wg->wait();    var_dump("all Coroutine done");});

运行结果

string(18) "sleep time:3 get 0"string(18) "sleep time:2 get 1"array(2) {  ["id"]=>  int(2)  ["name"]=>  string(6) "name_2"}array(2) {  ["id"]=>  int(1)  ["name"]=>  string(6) "name_1"}string(18) "all Coroutine done"
参考资料
[1] 

client-has-already-been-bound-to-another-coroutine: https://wiki.swoole.com/zh-cn/#/question/use?id=client-has-already-been-bound-to-another-coroutine

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  1. CONNECT:[ UseTime:0.000976s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001705s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000684s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000618s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001434s ]
  6. SELECT * FROM `set` [ RunTime:0.000665s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001531s ]
  8. SELECT * FROM `article` WHERE `id` = 474699 LIMIT 1 [ RunTime:0.001032s ]
  9. UPDATE `article` SET `lasttime` = 1770702742 WHERE `id` = 474699 [ RunTime:0.002725s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000595s ]
  11. SELECT * FROM `article` WHERE `id` < 474699 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001053s ]
  12. SELECT * FROM `article` WHERE `id` > 474699 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001402s ]
  13. SELECT * FROM `article` WHERE `id` < 474699 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007670s ]
  14. SELECT * FROM `article` WHERE `id` < 474699 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.010783s ]
  15. SELECT * FROM `article` WHERE `id` < 474699 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.015530s ]
0.154945s