2.3 KiB
2.3 KiB
AuThreading
Features
- Thread synchronization primitives: condition ex, condition mutex, condition variable, critical section, event, mutex, rwlock, semaphore, and spinlock
- All primitives include a trylock and a nanosecond-resolution timed lock methods
- All lock-like primitives can be used with a AuFlexibleConditionVariable (noting AuConditionVariable binds to a single AuCondMutex)
- WakeOnAddress support on every operating system regardless of kernel support
- WakeOnAddress with various wake operations (eNotEqual, eEqual, eLessThanCompare, eGreaterThanCompare, eLessThanOrEqualsCompare, eGreaterThanOrEqualsCompare) of any size under 32 bytes
- Reference futex primitives: AuInitOnce, AuInitOnceSmall, AuFutexBarrier, AuFutexCond, AuFutexMutex, AuFutexSemaphore, FutexWaitable*NoVTbl**Movable*Smallest (AuFutexMutexSmallest)
- No primitive will ever waste time syscalling or otherwise waking if not required
- Single core (thread check), Intel SMT (rdtsc), AARCH64 (rdtsc emu via CNTVCT_EL0), Intel Alderlake (umonitor/tpause), and AMD 2016+ (monitorx) optimized/aware spinning optimizations with in-process and CPU heuristics
- ...known good performance and low kernel stated CPU usage% on Windows 7, Windows 11, and Linux spanning a diverse range of processors.
- Timeline semaphores / completion barriers are supported via AuFutexSemaphore::LockUntilAtleastAbsNS/AcquireUntilAtleastAbsNS
- RWLock supports read-to-write upgrades when the decision to esclate is made based upon a shared resource, plus CheckSelfThreadIsWriter check
- RWLocks are read criticial section based and all writer threads are allowed to enter read critical sections. In addition, AuRWRenterableLock allows for write reentrancy.
- Enchanced Win32 support with increased yield resolution and optimization around internal XP, internal Win8, and UWP APIs
- SleepNs function supporting higher resolution sleep available than in most APIs (^1)
- Thread Object per native OS thread
- Thread spawning with TLS handles and shutdown routines ~~dispatched under pseudo fibers. TODO: reimpl thread 'features' and NT-like APCs ~~
- Update thread affinity, throttle, name, and related attributes
- Lock Util: AU_LOCK_GUARD(pointer/reference/shared ptr)
- Lock Util: AU_TRY_LOCK_GUARD[...](pointer/reference/shared ptr)
^1: README SleepNote.txt