mirromutth/latches

A downward counter (CountDownLatch) which can be used to synchronize threads or coordinate tasks

Hi there 👋

I'm Mirro Mutth, you can call me "mirror" in English or "ミロ" in Japanese.

Backend Architect 🧐, Developer 🤔, Gamer 🤪, Animation/Manga Fan 🥰

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Languages: English, Japanese, Chinese (are we talking about human language, right?)

latches's Issues

Full support for timeouts

For now, futex and sync (with atomic-wait) implementation does not have support for waiting with a timeout.

macOS does have the __ulock_wait syscall that do support a timeout, but it's a private/unstable API

Usage of private APIs can result in software being rejected from Apple's app stores

See also m-ou-se/atomic-wait#4

There have two solutions:

• Waits for Apple to expose a public API for futex/atomic-wait
• Implements it as a global pool containing mutexes and condition variables

The last option sounds like the only option I can to do something. But, the most common use case for latch is waiting without timeout. The last option will significantly increase the code size for a rare case.