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 aGTC, uint64_t aQPC, bool aHasQPC);
  27
  28   uint64_t CheckQPC(const TimeStampValue& aOther) const;
  29
  30   struct _SomethingVeryRandomHere;
  31   MOZ_CONSTEXPR TimeStampValue(_SomethingVeryRandomHere* aNullValue)
  32     : mGTC(0)
  33     , mQPC(0)
  34     , mHasQPC(false)
  35     , mIsNull(true)
  36   {
  37   }
  38
  39 public:
  40   uint64_t operator-(const TimeStampValue& aOther) const;
  41
  42   TimeStampValue operator+(const int64_t aOther) const
  43   {
  44     return TimeStampValue(mGTC + aOther, mQPC + aOther, mHasQPC);
  45   }
  46   TimeStampValue operator-(const int64_t aOther) const
  47   {
  48     return TimeStampValue(mGTC - aOther, mQPC - aOther, mHasQPC);
  49   }
  50   TimeStampValue& operator+=(const int64_t aOther);
  51   TimeStampValue& operator-=(const int64_t aOther);
  52
  53   bool operator<(const TimeStampValue& aOther) const
  54   {
  55     return int64_t(*this - aOther) < 0;
  56   }
  57   bool operator>(const TimeStampValue& aOther) const
  58   {
  59     return int64_t(*this - aOther) > 0;
  60   }
  61   bool operator<=(const TimeStampValue& aOther) const
  62   {
  63     return int64_t(*this - aOther) <= 0;
  64   }
  65   bool operator>=(const TimeStampValue& aOther) const
  66   {
  67     return int64_t(*this - aOther) >= 0;
  68   }
  69   bool operator==(const TimeStampValue& aOther) const
  70   {
  71     return int64_t(*this - aOther) == 0;
  72   }
  73   bool operator!=(const TimeStampValue& aOther) const
  74   {
  75     return int64_t(*this - aOther) != 0;
  76   }
  77 };
  78
  79 }
  80
  81 #endif /* mozilla_TimeStamp_h */