Module sync 

Contains macOS-specific synchronization functions.

For os_unfair_lock, see the documentation https://developer.apple.com/documentation/os/synchronization?language=objc and in case of underspecification its implementation https://github.com/apple-oss-distributions/libplatform/blob/a00a4cc36da2110578bcf3b8eeeeb93dcc7f4e11/src/os/lock.c#L645.

Note that we don’t emulate every edge-case behaviour of the locks. Notably, we don’t abort when locking a lock owned by a thread that has already exited and we do not detect copying of the lock, but macOS doesn’t guarantee anything in that case either. FIXME: synchronize behavior on lock copies/moves with macOS guarantees. Apparently there is hope that macOS might eventually guarantee more than it does today.

Structs

MacOsFutex 🔒

Metadata for a macOS futex.

MacOsSemaphore 🔒

Enums

MacOsFutexTimeout

MacOsUnfairLock 🔒

Constants

DISPATCH_TIME_FOREVER 🔒

DISPATCH_TIME_NOW 🔒

SEM_INIT_OFFSET 🔒

SYNC_INIT 🔒

SYNC_UNINIT 🔒

Traits

EvalContextExt

EvalContextExtPriv 🔒