## Channel
`Swoole-1.9.0`新增了一个新的内存数据结构`Channel`,用于实现高性能的进程间通信,底层基于共享内存+`Mutex`互斥锁实现,可实现用户态的高性能内存队列。
* `Channel`可用于多进程环境下,底层在读取写入时会自动加锁,应用层不需要担心数据同步问题
* 必须在父进程内创建才可以在子进程内使用
> `Channel`不受`PHP`的`memory_limit`控制
## 使用示例:
~~~
$chan = new Swoole\Channel(1024 * 256);
$n = 100000;
$bytes = 0;
if (pcntl_fork() > 0)
{
echo "Father\n";
for ($i = 0; $i < $n; $i++)
{
$data = str_repeat('A', rand(100, 200));
if ($chan->push($data) === false)
{
echo "channel full\n";
usleep(1000);
$i--;
continue;
}
$bytes += strlen($data);
// echo "#$i\tpush ".strlen($data)." bytes\n";
}
echo "total push bytes: $bytes\n";
var_dump($chan->stats());
}
else
{
echo "Child\n";
for ($i = 0; $i < $n; $i++)
{
$data = $chan->pop();
if ($data === false)
{
echo "channel empty\n";
usleep(1000);
$i--;
continue;
}
$bytes += strlen($data);
// echo "#$i\tpop " . strlen($data) . " bytes\n";
}
echo "total pop bytes: $bytes\n";
var_dump($chan->stats());
}
~~~
- 序章
- 1.环境搭建
- PHP7源码编译安装
- Swoole源码编译安装
- Mysql5.7源码安装
- Redis安装
- 2.搭建Echo服务器
- 3.Server服务器
- 函数列表
- Server::__construct
- Server->set
- Server->on
- Server->start
- Server->send
- WebSocket
- Server->push
- Server->exist
- Server::pack
- Server::unpack
- Server->disconnect
- Server->isEstablished
- 配置选项
- reactor_num
- worker_num
- max_request
- max_conn
- daemonize
- backlog
- log_file
- log_level
- upload_tmp_dir
- http_parse_post
- document_root
- http_compression
- 事件回调函数
- onStart
- onWorkerStart
- onConnect
- onReceive
- onPacket
- onRequest
- 请求Request
- Http\Request->$header
- Http\Request->$server
- Http\Request->$get
- Http\Request->$post
- Http\Request->$cookie
- Http\Request->$files
- Http\Request->rawContent
- Http\Request->getData
- 响应Response
- Http\Response->header
- Http\Response->cookie
- Http\Response->status
- Http\Response->redirect
- Http\Response->write
- Http\Response->sendfile
- Http\Response->end
- Http\Response->detach
- Http\Response::create
- onClose
- onOpen
- onMessage
- 创建服务器
- TCP服务器
- UDP服务器
- HTTP服务器
- WebSocket服务器
- 4.定时器Timer
- 5.进程Process
- Process::__construct
- Process->start
- Process->name
- Process->exec
- Process->write
- Process->read
- Process->setTimeout
- Process->setBlocking
- Process->useQueue
- Process->statQueue
- Process->freeQueue
- Process->push
- Process->pop
- Process->close
- Process->exit
- Process::kill
- Process::wait
- Process::daemon
- Process::signal
- 6.内存Memory
- Table
- Table->__construct
- Table->column
- Table->create
- Table->set
- Table->incr
- Table->decr
- Table->get
- Table->exist
- Table->count
- Table->del
- Channel
- Channel->__construct
- Channel->push
- Channel->pop
- Channel->stats
- 7.协程Coroutine
- Coroutine
- Coroutine::list
- Coroutine::set
- Coroutine::stats
- Coroutine::create
- Coroutine::exist
- Coroutine::getCid
- Coroutine::getContext
- Coroutine::defer
- Coroutine::getBackTrace
- Coroutine::yield
- Coroutine::resume
- Coroutine::fread
- Coroutine::fgets
- Coroutine::fwrite
- Coroutine::sleep
- Coroutine::gethostbyname
- Coroutine::getaddrinfo
- Coroutine::exec
- Coroutine::readFile
- Coroutine::writeFile
- Coroutine::statvfs
- Coroutine::getPcid
- Coroutine\Channel
- Coroutine\Channel->__construct
- Coroutine\Channel->push
- Coroutine\Channel->pop
- Coroutine\Channel->stats
- Coroutine\Channel->close
- Coroutine\Channel->length
- Coroutine\Channel->isEmpty
- Coroutine\Channel->isFull
- Coroutine\Channel->$capacity
- Coroutine\Channel->$errCode
- Coroutine\Client
- Coroutine\Client->connect
- Coroutine\Client->send
- Coroutine\Client->recv
- Coroutine\Client->close
- Coroutine\Client->peek
- Coroutine\Client->set
- Coroutine\Http\Client
- Coroutine\Http\Client->get
- Coroutine\Http\Client->post
- 其他
- 并行和并发的区别
- 堆、栈、队列