a3b8c67ea6
Reason for revert: Breaks visualbench Original issue's description: > small tidy of benchmarkstream > > BUG=skia: > > Committed: https://skia.googlesource.com/skia/+/691b6af907e55250a29a7a2a346b63c2026011c3 TBR=robertphillips@google.com,joshualitt@chromium.org NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=skia: Review URL: https://codereview.chromium.org/1392833006
77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef TimingStateMachine_DEFINED
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#define TimingStateMachine_DEFINED
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#include "Benchmark.h"
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#include "SkTArray.h"
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#include "Timer.h"
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class SkCanvas;
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/*
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* Manages a timer via a state machine. Can be used by modules to time benchmarks
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*
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* Clients call nextFrame, and must handle any requests from the timing state machine, specifically
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* to reset. When kTimingFinished_ParentEvents is returned, then lastMeasurement() will return the
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* timing and loops() will return the number of loops used to time.
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*
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* A client may continue timing the same benchmark indefinitely. To advance to the next
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* benchmark, the client should call nextBenchmark.
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*/
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class TimingStateMachine {
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public:
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TimingStateMachine();
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enum ParentEvents {
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kReset_ParentEvents,
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kTiming_ParentEvents,
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kTimingFinished_ParentEvents,// This implies parent can read lastMeasurement() and must
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// reset
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};
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ParentEvents nextFrame(bool preWarmBetweenSamples);
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/*
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* The caller should call this when they are ready to move to the next benchmark. The caller
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* must call this with the *last* benchmark so post draw hooks can be invoked
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*/
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void nextBenchmark(SkCanvas*, Benchmark*);
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/*
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* When TimingStateMachine returns kTimingFinished_ParentEvents, then the owner can call
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* lastMeasurement() to get the time
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*/
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double lastMeasurement() const { return fLastMeasurement; }
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int loops() const { return fLoops; }
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private:
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enum State {
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kPreWarm_State,
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kTiming_State,
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};
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enum InnerState {
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kTuning_InnerState,
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kTiming_InnerState,
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};
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inline double elapsed();
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void resetTimingState();
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void recordMeasurement();
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int fCurrentFrame;
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int fLoops;
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double fLastMeasurement;
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WallTimer fTimer;
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State fState;
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InnerState fInnerState;
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};
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#endif
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