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27// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
28// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
29
30#ifndef PSFOUNDATION_PSTIME_H
31#define PSFOUNDATION_PSTIME_H
32
33#include "Ps.h"
34#include "foundation/PxFoundationConfig.h"
35
36#if PX_LINUX || PX_ANDROID
37#include <time.h>
38#endif
39
40namespace physx
41{
42namespace shdfnd
43{
44
45struct CounterFrequencyToTensOfNanos
46{
47 uint64_t mNumerator;
48 uint64_t mDenominator;
49 CounterFrequencyToTensOfNanos(uint64_t inNum, uint64_t inDenom) : mNumerator(inNum), mDenominator(inDenom)
50 {
51 }
52
53 // quite slow.
54 uint64_t toTensOfNanos(uint64_t inCounter) const
55 {
56 return (inCounter * mNumerator) / mDenominator;
57 }
58};
59
60class PX_FOUNDATION_API Time
61{
62 public:
63 typedef double Second;
64 static const uint64_t sNumTensOfNanoSecondsInASecond = 100000000;
65 // This is supposedly guaranteed to not change after system boot
66 // regardless of processors, speedstep, etc.
67 static const CounterFrequencyToTensOfNanos& getBootCounterFrequency();
68
69 static CounterFrequencyToTensOfNanos getCounterFrequency();
70
71 static uint64_t getCurrentCounterValue();
72
73 // SLOW!!
74 // Thar be a 64 bit divide in thar!
75 static uint64_t getCurrentTimeInTensOfNanoSeconds()
76 {
77 uint64_t ticks = getCurrentCounterValue();
78 return getBootCounterFrequency().toTensOfNanos(inCounter: ticks);
79 }
80
81 Time();
82 Second getElapsedSeconds();
83 Second peekElapsedSeconds();
84 Second getLastTime() const;
85
86 private:
87#if PX_LINUX || PX_ANDROID || PX_APPLE_FAMILY || PX_PS4
88 Second mLastTime;
89#else
90 int64_t mTickCount;
91#endif
92};
93} // namespace shdfnd
94} // namespace physx
95
96#endif // #ifndef PSFOUNDATION_PSTIME_H
97

source code of qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/PsTime.h