README

Library that will help you to store data in shared memory using PHP's System V shared memory functions.

Features

• Store arrays of integers in shared memory
• Thread-safe access using semaphores
• Support for multiple independent storage instances
• Automatic memory management and cleanup
• Compatible with PHP 8.0, 8.1, 8.2, and 8.3

Requirements

• PHP 8.0 or higher
• System V shared memory extension (sysvsem, sysvshm)
• malkusch/lock package for mutex functionality

Install

composer require positron48/memorystorage

Usage

<?php
require 'vendor/autoload.php';

use MemoryStorage\ArrayMemoryStorage;

// Create a storage for 3 integers
$storage = new ArrayMemoryStorage('my_counter', 3);

// Set data
$storage->set([100, 200, 300]);

// Get data
$data = $storage->get(); // Returns [100, 200, 300]

// Use mutex for thread-safe operations
$mutex = $storage->getMutex();
$mutex->synchronized(function () use ($storage) {
    $current = $storage->get();
    $current[0]++;
    $storage->set($current);
});

// Clean up (removes shared memory and semaphore)
$storage->remove();

Development

Running Tests Locally

1. Clone the repository
2. Install dependencies: composer install
3. Run tests: composer test

Continuous Integration

The project uses GitHub Actions for CI/CD with the following workflows:

• CI: Runs tests on all supported PHP versions
• Test Matrix: Extended testing with different dependency versions and OS combinations

License

This library is licensed under the GPL-3.0-or-later license. See the LICENSE file for details.