From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:22:09 +0200 Subject: Adding upstream version 110.0.1. Signed-off-by: Daniel Baumann --- mozglue/misc/TimeStamp_windows.h | 93 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 mozglue/misc/TimeStamp_windows.h (limited to 'mozglue/misc/TimeStamp_windows.h') diff --git a/mozglue/misc/TimeStamp_windows.h b/mozglue/misc/TimeStamp_windows.h new file mode 100644 index 0000000000..a1f4e31ec7 --- /dev/null +++ b/mozglue/misc/TimeStamp_windows.h @@ -0,0 +1,93 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_TimeStamp_windows_h +#define mozilla_TimeStamp_windows_h + +#include "mozilla/Types.h" + +namespace mozilla { + +/** + * The [mt] unit: + * + * Many values are kept in ticks of the Performance Counter x 1000, + * further just referred as [mt], meaning milli-ticks. + * + * This is needed to preserve maximum precision of the performance frequency + * representation. GetTickCount64 values in milliseconds are multiplied with + * frequency per second. Therefore we need to multiply QPC value by 1000 to + * have the same units to allow simple arithmentic with both QPC and GTC. + */ +#define ms2mt(x) ((x)*mozilla::GetQueryPerformanceFrequencyPerSec()) +#define mt2ms(x) ((x) / mozilla::GetQueryPerformanceFrequencyPerSec()) +#define mt2ms_f(x) (double(x) / mozilla::GetQueryPerformanceFrequencyPerSec()) + +MFBT_API uint64_t GetQueryPerformanceFrequencyPerSec(); + +class TimeStamp; +class TimeStampValue; + +TimeStampValue NowInternal(bool aHighResolution); + +class TimeStampValue { + friend TimeStampValue NowInternal(bool); + friend bool IsCanonicalTimeStamp(TimeStampValue); + friend struct IPC::ParamTraits; + friend class TimeStamp; + + // Both QPC and GTC are kept in [mt] units. + uint64_t mGTC; + uint64_t mQPC; + + bool mIsNull; + bool mHasQPC; + + MFBT_API TimeStampValue(uint64_t aGTC, uint64_t aQPC, bool aHasQPC); + + MFBT_API uint64_t CheckQPC(const TimeStampValue& aOther) const; + + // This struct is used to allow doing TimeStampValue a = 0 and similar + struct _SomethingVeryRandomHere; + constexpr MOZ_IMPLICIT TimeStampValue(_SomethingVeryRandomHere* aNullValue) + : mGTC(0), mQPC(0), mIsNull(true), mHasQPC(false) {} + + public: + MFBT_API uint64_t operator-(const TimeStampValue& aOther) const; + + TimeStampValue operator+(const int64_t aOther) const { + return TimeStampValue(mGTC + aOther, mQPC + aOther, mHasQPC); + } + TimeStampValue operator-(const int64_t aOther) const { + return TimeStampValue(mGTC - aOther, mQPC - aOther, mHasQPC); + } + MFBT_API TimeStampValue& operator+=(const int64_t aOther); + MFBT_API TimeStampValue& operator-=(const int64_t aOther); + + bool operator<(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) < 0; + } + bool operator>(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) > 0; + } + bool operator<=(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) <= 0; + } + bool operator>=(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) >= 0; + } + bool operator==(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) == 0; + } + bool operator!=(const TimeStampValue& aOther) const { + return int64_t(*this - aOther) != 0; + } + bool IsNull() const { return mIsNull; } +}; + +} // namespace mozilla + +#endif /* mozilla_TimeStamp_h */ -- cgit v1.2.3