Zend async Scheduler ABI#22561
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…context The Async Core ABI (zend_async_API.h): coroutines with a packed lifecycle, scheduler slots (launch, enqueue-with-error, suspend, cancel, await), switch/finish handler vectors, the awaiting-info vector, microtasks, and the coroutine context — an embedded internal store for C extensions (process-unique numeric keys) plus the userland zend_async_context_t storage behind a provider-registered class. Fibers run as coroutines under a scheduler; gc_collect_cycles() stays synchronous over a GC coroutine; shutdown drains coroutines gracefully. Two optional in-tree providers validate the ABI from both sides: ext/test_scheduler, the C reference (gated by test_scheduler.enable), and ext/async_scheduler_hook, the PHP bridge — Async\SchedulerHook + Async\Scheduler (onLaunch/onShutdown/onFiber/onEnqueue/onSuspend/onDefer), a coroutine-centric mandate of three hidden capabilities (bindEntry/switchTo/currentCoroutine), explicit main replacement at every end-of-main handover, and the Async\Context / Async\get_context() surface over the engine storage. Tests run both variants in one binary: upstream suites stay byte-for-byte and run schedulerless; scheduler-adapted duplicates and the provider suites opt in.
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A lightweight asynchronous core without complex logic.
The idea is:
https://github.com/true-async/php-async-core-rfc/blob/main/scheduler_rfc.md
A detailed explanation of the core integration can be found here:
https://github.com/true-async/php-async-core-rfc/blob/main/core-integration.md
At the moment, both the code and the RFC are still under development. I'd be happy to hear your ideas and feedback.