xpcom/ds/TimeStamp_windows.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_TimeStamp_windows_h
   8 #define mozilla_TimeStamp_windows_h
   9
  10 namespace mozilla {
  11
  12 class TimeStamp;
  13
  14 class TimeStampValue
  15 {
  16   friend struct IPC::ParamTraits<mozilla::TimeStampValue>;
  17   friend class TimeStamp;
  18   friend void StartupTimelineRecordExternal(int, uint64_t);
  19
  20   // Both QPC and GTC are kept in [mt] units.
  21   uint64_t mGTC;
  22   uint64_t mQPC;
  23   bool mHasQPC;
  24   bool mIsNull;
  25
  26   TimeStampValue(uint64_t GTC, uint64_t QPC, bool hasQPC);
  27
  28   uint64_t CheckQPC(const TimeStampValue &aOther) const;
  29
  30   struct _SomethingVeryRandomHere;
  31   MOZ_CONSTEXPR TimeStampValue(_SomethingVeryRandomHere* nullValue)
  32     : mGTC(0), mQPC(0), mHasQPC(false), mIsNull(true) {}
  33
  34
  35 public:
  36   uint64_t operator-(const TimeStampValue &aOther) const;
  37
  38   TimeStampValue operator+(const int64_t aOther) const
  39     { return TimeStampValue(mGTC + aOther, mQPC + aOther, mHasQPC); }
  40   TimeStampValue operator-(const int64_t aOther) const
  41     { return TimeStampValue(mGTC - aOther, mQPC - aOther, mHasQPC); }
  42   TimeStampValue& operator+=(const int64_t aOther);
  43   TimeStampValue& operator-=(const int64_t aOther);
  44
  45   bool operator<(const TimeStampValue &aOther) const
  46     { return int64_t(*this - aOther) < 0; }
  47   bool operator>(const TimeStampValue &aOther) const
  48     { return int64_t(*this - aOther) > 0; }
  49   bool operator<=(const TimeStampValue &aOther) const
  50     { return int64_t(*this - aOther) <= 0; }
  51   bool operator>=(const TimeStampValue &aOther) const
  52     { return int64_t(*this - aOther) >= 0; }
  53   bool operator==(const TimeStampValue &aOther) const
  54     { return int64_t(*this - aOther) == 0; }
  55   bool operator!=(const TimeStampValue &aOther) const
  56     { return int64_t(*this - aOther) != 0; }
  57 };
  58
  59 }
  60
  61 #endif /* mozilla_TimeStamp_h */