Mutex Support

[SerafimArts]

The implementation of mutexes must meet the following criteria:

• Support for Windows, Linux, and MacOS
• Support for x86, AMD64, and Aarch64 architectures
• PHP 8.4+ support
• Support for ZTS and NTS PHP builds

Required

• Analyze ready-made OSS solutions for implementing mutexes (symfony/lock meets the requirements?)
• Analyze the problems of native CAS implementon (see https://github.com/boson-php/pasm)
• Analyze the problems of software implementations (Spinlock over Shared Memory?)

Based on the analysis results, develop an implementation plan