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 ( ) : bool

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