78 lines
1.7 KiB
C
78 lines
1.7 KiB
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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#include "HAL/PlatformTime.h"
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// Simple stopwatch.
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struct FStopwatch
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{
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uint64 AccumulatedTime = 0;
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uint64 StartTime = 0;
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bool bIsStarted = false;
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void Start()
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{
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if (!bIsStarted)
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{
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bIsStarted = true;
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StartTime = FPlatformTime::Cycles64();
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}
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}
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void Stop()
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{
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if (bIsStarted)
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{
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bIsStarted = false;
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AccumulatedTime += FPlatformTime::Cycles64() - StartTime;
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}
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}
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void Update()
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{
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if (bIsStarted)
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{
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uint64 CrtTime = FPlatformTime::Cycles64();
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AccumulatedTime += CrtTime - StartTime;
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StartTime = CrtTime;
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}
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}
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void Restart()
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{
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AccumulatedTime = 0;
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bIsStarted = true;
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StartTime = FPlatformTime::Cycles64();
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}
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void Reset()
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{
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AccumulatedTime = 0;
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StartTime = 0;
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bIsStarted = false;
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}
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double GetAccumulatedTime() const
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{
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return FStopwatch::Cycles64ToSeconds(AccumulatedTime);
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}
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uint64 GetAccumulatedTimeMs() const
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{
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return FStopwatch::Cycles64ToMilliseconds(AccumulatedTime);
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}
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static double Cycles64ToSeconds(const uint64 Cycles64)
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{
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return static_cast<double>(Cycles64) * FPlatformTime::GetSecondsPerCycle64();
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}
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static uint64 Cycles64ToMilliseconds(const uint64 Cycles64)
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{
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const double Milliseconds = FMath::RoundToDouble(static_cast<double>(Cycles64 * 1000) * FPlatformTime::GetSecondsPerCycle64());
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return static_cast<uint64>(Milliseconds);
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}
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};
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