80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/***
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Copyright (C) 2021-2024 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuConditionMutex.NT.hpp
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Date: 2021-6-12
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Author: Reece
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***/
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#pragma once
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#include "AuIConditionMutexEx.hpp"
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#if !defined(_AURUNTIME_GENERICCM)
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namespace Aurora::Threading::Primitives
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{
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// Note: these magic numbers are powers of two such that you can use them as add/sub operations
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// in place of masking.
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// ie: add = or
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// sub = and
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// assuming the bits are unset/set respectively
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static auto const kFutexBitWake = 256u; // 2^8
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static auto const kFutexBitWait = 512u; // 2^9, next byte over
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inline HANDLE gKeyedEventHandle { INVALID_HANDLE_VALUE };
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// Actually NT5.x
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struct NT4Mutex
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{
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volatile AuUInt32 uWaitCount {}; // yields while bits are high, dec to release one from the semaphore yield
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};
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struct Win32ConditionMutex final
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{
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Win32ConditionMutex();
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~Win32ConditionMutex();
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bool TryLock();
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void Lock();
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void Unlock();
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AuUInt GetOSHandle();
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auline bool TryLockNoSpin();
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auline bool TryLockHeavy();
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#if !defined(AURORA_FORCE_SRW_LOCKS)
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NT4Mutex lock_;
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#else
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SRWLOCK lock_;
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#endif
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};
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using ConditionMutexInternal = Win32ConditionMutex;
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struct ConditionMutexImpl final : IConditionMutexEx
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{
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auline bool TryLock()
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{
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return mutex.TryLock();
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}
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auline void Lock()
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{
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mutex.Lock();
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}
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auline void Unlock()
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{
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mutex.Unlock();
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}
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inline AuUInt GetOSHandle()
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{
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return mutex.GetOSHandle();
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}
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ConditionMutexInternal mutex;
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};
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}
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#endif |