The SyncSharedMemory class

Introduction

(PECL sync >= 1.1.0)

A cross-platform, native, consistent implementation of named shared memory objects.

Shared memory lets two separate processes communicate without the need for complex pipes or sockets. There are several integer-based shared memory implementations for PHP. Named shared memory is an alternative.

Synchronization objects (e.g. SyncMutex) are still required to protect most uses of shared memory.

Class synopsis

public __construct(string $name, int $size)

public first(): bool

public read(int $start = 0, int $length = ?)

public size(): int

public write(string $string = ?, int $start = 0)

Table of Contents

• SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object
• SyncSharedMemory::first — Check to see if the object is the first instance system-wide of named shared memory
• SyncSharedMemory::read — Copy data from named shared memory
• SyncSharedMemory::size — Returns the size of the named shared memory
• SyncSharedMemory::write — Copy data to named shared memory