PHP Framework
Workerman
Inter-process communication implementation method in Workerman document
Inter-process communication implementation method in Workerman document
Nov 08, 2023 am 08:54 AM
Workerman is a powerful PHP development framework that supports high-concurrency network communication and is very useful for building applications with high real-time requirements. In Workerman's documentation, there is a very important function implementation method-inter-process communication.
Inter-process communication (IPC) is a very important mechanism in the operating system, which allows the exchange and sharing of data between different processes. In Workerman, the implementation of inter-process communication functions can be accomplished by using shared memory and semaphores.
First of all, we need to understand the basic principles of inter-process communication. In the operating system, each process has its own independent memory space, but through shared memory, different processes can share a certain memory area to realize data exchange and sharing.
In Workerman, you can use the Worker::$shmCache attribute to implement the shared memory function. $shmCache is an array that can be used to store data shared between multiple processes. The following is a simple code example:
use WorkermanWorker;
// 創(chuàng)建一個(gè)Worker對(duì)象
$worker = new Worker();
// 初始化一個(gè)共享內(nèi)存區(qū)域，大小為1024
$worker->shmCache = new WorkerShmCache(1024);
// 設(shè)置進(jìn)程啟動(dòng)時(shí)的回調(diào)函數(shù)
$worker->onWorkerStart = function() {
global $worker;
// 啟動(dòng)時(shí)，將數(shù)據(jù)寫(xiě)入共享內(nèi)存區(qū)域
$worker->shmCache->put('key', 'value');
};
// 設(shè)置進(jìn)程收到消息時(shí)的回調(diào)函數(shù)
$worker->onMessage = function($connection, $data) {
global $worker;
// 收到消息時(shí)，讀取共享內(nèi)存區(qū)域的數(shù)據(jù)
$value = $worker->shmCache->get('key');
// 將數(shù)據(jù)發(fā)送給客戶端
$connection->send($value);
};
// 啟動(dòng)Worker對(duì)象
Worker::runAll();In the above code, we write data to the shared memory area through the $worker->shmCache->put() method, and Read the data in the shared memory area through the $worker->shmCache->get() method. In this way, different processes can exchange and share data through shared memory.
In addition to shared memory, semaphores are also a commonly used inter-process communication mechanism. In Workerman, you can use the Worker::$sem attribute to implement the semaphore function. $sem is an integer variable used to represent the value of the semaphore. The following is a simple example:
use WorkermanWorker;
// 創(chuàng)建一個(gè)Worker對(duì)象
$worker = new Worker();
// 初始化一個(gè)信號(hào)量
$worker->sem = 0;
// 設(shè)置進(jìn)程啟動(dòng)時(shí)的回調(diào)函數(shù)
$worker->onWorkerStart = function() {
global $worker;
// 啟動(dòng)時(shí)，增加信號(hào)量的值
$worker->sem++;
};
// 設(shè)置進(jìn)程收到消息時(shí)的回調(diào)函數(shù)
$worker->onMessage = function($connection, $data) {
global $worker;
// 收到消息時(shí)，減少信號(hào)量的值
$worker->sem--;
// 將信號(hào)量的值發(fā)送給客戶端
$connection->send($worker->sem);
};
// 啟動(dòng)Worker對(duì)象
Worker::runAll();In the above code, we represent the value of the semaphore through the $worker->sem variable, and pass the $worker-> sem and $worker->sem-- operate to increase and decrease the value of the semaphore. In this way, different processes can achieve synchronization and mutual exclusion functions through semaphores.
In this article, we introduce the implementation method of inter-process communication through Workerman's documentation. By sharing memory and semaphores, different processes can easily exchange and share data. If you want to know more details about Workerman's inter-process communication, please refer to the official documentation.
The above is the detailed content of Inter-process communication implementation method in Workerman document. For more information, please follow other related articles on the PHP Chinese website!
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