54 lines
881 B
C
54 lines
881 B
C
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// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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class FZenaphore;
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struct FZenaphoreWaiterNode
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{
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FZenaphoreWaiterNode* Next = nullptr;
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bool bTriggered = false;
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};
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class FZenaphoreWaiter
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{
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public:
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FZenaphoreWaiter(FZenaphore& Outer, const TCHAR* WaitCpuScopeName)
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: Outer(Outer)
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{
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}
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~FZenaphoreWaiter();
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void Wait();
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private:
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friend class FZenaphore;
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void WaitInternal();
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FZenaphore& Outer;
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FZenaphoreWaiterNode WaiterNode;
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int32 SpinCount = 0;
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};
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class FZenaphore
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{
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public:
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FZenaphore();
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~FZenaphore();
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void NotifyOne();
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void NotifyAll();
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private:
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friend class FZenaphoreWaiter;
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void NotifyInternal(FZenaphoreWaiterNode* Waiter);
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FEvent* Event;
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FCriticalSection Mutex;
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TAtomic<FZenaphoreWaiterNode*> HeadWaiter{nullptr};
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};
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