Move shared files in net/quic/ into net/quic/core/

net/quic/quic_time.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-// QuicTime represents one point in time, stored in microsecond resolution.
-// QuicTime is monotonically increasing, even across system clock adjustments.
-// The epoch (time 0) of QuicTime is unspecified.
-//
-// This implementation wraps the classes base::TimeTicks and base::TimeDelta.
-
-#ifndef NET_QUIC_QUIC_TIME_H_
-#define NET_QUIC_QUIC_TIME_H_
-
-#include <stdint.h>
-
-#include "base/compiler_specific.h"
-#include "base/time/time.h"
-#include "net/base/net_export.h"
-
-#define QUICTIME_CONSTEXPR inline
-
-namespace net {
-
-static const int kNumSecondsPerMinute = 60;
-static const int kNumSecondsPerHour = kNumSecondsPerMinute * 60;
-static const uint64_t kNumMicrosPerSecond = base::Time::kMicrosecondsPerSecond;
-static const uint64_t kNumMicrosPerMilli =
-    base::Time::kMicrosecondsPerMillisecond;
-
-// A QuicTime is a purely relative time. QuicTime values from different clocks
-// cannot be compared to each other. If you need an absolute time, see
-// QuicWallTime, below.
-class NET_EXPORT_PRIVATE QuicTime {
- public:
-  // A QuicTime::Delta represents the signed difference between two points in
-  // time, stored in microsecond resolution.
-  class NET_EXPORT_PRIVATE Delta {
-   public:
-    explicit Delta(base::TimeDelta delta);
-
-    // Create a object with an offset of 0.
-    static QUICTIME_CONSTEXPR Delta Zero() { return Delta(0); }
-
-    // Create a object with infinite offset time.
-    static QUICTIME_CONSTEXPR Delta Infinite() {
-      return Delta(kQuicInfiniteTimeUs);
-    }
-
-    // Converts a number of seconds to a time offset.
-    static QUICTIME_CONSTEXPR Delta FromSeconds(int64_t secs) {
-      return Delta(secs * 1000 * 1000);
-    }
-
-    // Converts a number of milliseconds to a time offset.
-    static QUICTIME_CONSTEXPR Delta FromMilliseconds(int64_t ms) {
-      return Delta(ms * 1000);
-    }
-
-    // Converts a number of microseconds to a time offset.
-    static QUICTIME_CONSTEXPR Delta FromMicroseconds(int64_t us) {
-      return Delta(us);
-    }
-
-    // Converts the time offset to a rounded number of seconds.
-    inline int64_t ToSeconds() const { return time_offset_ / 1000 / 1000; }
-
-    // Converts the time offset to a rounded number of milliseconds.
-    inline int64_t ToMilliseconds() const { return time_offset_ / 1000; }
-
-    // Converts the time offset to a rounded number of microseconds.
-    inline int64_t ToMicroseconds() const { return time_offset_; }
-
-    inline bool IsZero() const { return time_offset_ == 0; }
-
-    inline bool IsInfinite() const {
-      return time_offset_ == kQuicInfiniteTimeUs;
-    }
-
-   private:
-    base::TimeDelta delta_;
-    friend inline bool operator==(QuicTime::Delta lhs, QuicTime::Delta rhs);
-    friend inline bool operator<(QuicTime::Delta lhs, QuicTime::Delta rhs);
-    friend inline QuicTime::Delta operator<<(QuicTime::Delta lhs, size_t rhs);
-    friend inline QuicTime::Delta operator>>(QuicTime::Delta lhs, size_t rhs);
-
-    friend inline QuicTime::Delta operator+(QuicTime::Delta lhs,
-                                            QuicTime::Delta rhs);
-    friend inline QuicTime::Delta operator-(QuicTime::Delta lhs,
-                                            QuicTime::Delta rhs);
-    friend inline QuicTime::Delta operator*(QuicTime::Delta lhs, int rhs);
-    friend inline QuicTime::Delta operator*(QuicTime::Delta lhs, double rhs);
-
-    friend inline QuicTime operator+(QuicTime lhs, QuicTime::Delta rhs);
-    friend inline QuicTime operator-(QuicTime lhs, QuicTime::Delta rhs);
-    friend inline QuicTime::Delta operator-(QuicTime lhs, QuicTime rhs);
-
-    static const int64_t kQuicInfiniteTimeUs =
-        std::numeric_limits<int64_t>::max();
-
-    explicit QUICTIME_CONSTEXPR Delta(int64_t time_offset)
-        : time_offset_(time_offset) {}
-
-    int64_t time_offset_;
-    friend class QuicTime;
-    friend class QuicClock;
-  };
-
-  explicit QuicTime(base::TimeTicks ticks) : time_(ticks.ToInternalValue()) {}
-
-  // Creates a new QuicTime with an internal value of 0.  IsInitialized()
-  // will return false for these times.
-  static QUICTIME_CONSTEXPR QuicTime Zero() { return QuicTime(0); }
-
-  // Creates a new QuicTime with an infinite time.
-  static QUICTIME_CONSTEXPR QuicTime Infinite() {
-    return QuicTime(Delta::kQuicInfiniteTimeUs);
-  }
-
-  // Produce the internal value to be used when logging.  This value
-  // represents the number of microseconds since some epoch.  It may
-  // be the UNIX epoch on some platforms.  On others, it may
-  // be a CPU ticks based value.
-  inline int64_t ToDebuggingValue() const { return time_; }
-
-  inline bool IsInitialized() const { return 0 != time_; }
-
- private:
-  friend inline bool operator==(QuicTime lhs, QuicTime rhs);
-  friend inline bool operator<(QuicTime lhs, QuicTime rhs);
-  friend inline QuicTime operator+(QuicTime lhs, QuicTime::Delta rhs);
-  friend inline QuicTime operator-(QuicTime lhs, QuicTime::Delta rhs);
-  friend inline QuicTime::Delta operator-(QuicTime lhs, QuicTime rhs);
-
-  explicit QUICTIME_CONSTEXPR QuicTime(int64_t time) : time_(time) {}
-
-  int64_t time_;
-};
-
-// A QuicWallTime represents an absolute time that is globally consistent. In
-// practice, clock-skew means that comparing values from different machines
-// requires some flexibility.
-class NET_EXPORT_PRIVATE QuicWallTime {
- public:
-  // FromUNIXSeconds constructs a QuicWallTime from a count of the seconds
-  // since the UNIX epoch.
-  static QUICTIME_CONSTEXPR QuicWallTime FromUNIXSeconds(uint64_t seconds) {
-    return QuicWallTime(seconds * 1000000);
-  }
-
-  static QUICTIME_CONSTEXPR QuicWallTime
-  FromUNIXMicroseconds(uint64_t microseconds) {
-    return QuicWallTime(microseconds);
-  }
-
-  // Zero returns a QuicWallTime set to zero. IsZero will return true for this
-  // value.
-  static QUICTIME_CONSTEXPR QuicWallTime Zero() { return QuicWallTime(0); }
-
-  // Returns the number of seconds since the UNIX epoch.
-  uint64_t ToUNIXSeconds() const;
-  // Returns the number of microseconds since the UNIX epoch.
-  uint64_t ToUNIXMicroseconds() const;
-
-  bool IsAfter(QuicWallTime other) const;
-  bool IsBefore(QuicWallTime other) const;
-
-  // IsZero returns true if this object is the result of calling |Zero|.
-  bool IsZero() const;
-
-  // AbsoluteDifference returns the absolute value of the time difference
-  // between |this| and |other|.
-  QuicTime::Delta AbsoluteDifference(QuicWallTime other) const;
-
-  // Add returns a new QuicWallTime that represents the time of |this| plus
-  // |delta|.
-  QuicWallTime Add(QuicTime::Delta delta) const WARN_UNUSED_RESULT;
-
-  // Subtract returns a new QuicWallTime that represents the time of |this|
-  // minus |delta|.
-  QuicWallTime Subtract(QuicTime::Delta delta) const WARN_UNUSED_RESULT;
-
- private:
-  explicit QUICTIME_CONSTEXPR QuicWallTime(uint64_t microseconds)
-      : microseconds_(microseconds) {}
-
-  uint64_t microseconds_;
-};
-
-// Non-member relational operators for QuicTime::Delta.
-inline bool operator==(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return lhs.time_offset_ == rhs.time_offset_;
-}
-inline bool operator!=(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return !(lhs == rhs);
-}
-inline bool operator<(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return lhs.time_offset_ < rhs.time_offset_;
-}
-inline bool operator>(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return rhs < lhs;
-}
-inline bool operator<=(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return !(rhs < lhs);
-}
-inline bool operator>=(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return !(lhs < rhs);
-}
-inline QuicTime::Delta operator<<(QuicTime::Delta lhs, size_t rhs) {
-  return QuicTime::Delta(lhs.time_offset_ << rhs);
-}
-inline QuicTime::Delta operator>>(QuicTime::Delta lhs, size_t rhs) {
-  return QuicTime::Delta(lhs.time_offset_ >> rhs);
-}
-
-// Non-member relational operators for QuicTime.
-inline bool operator==(QuicTime lhs, QuicTime rhs) {
-  return lhs.time_ == rhs.time_;
-}
-inline bool operator!=(QuicTime lhs, QuicTime rhs) {
-  return !(lhs == rhs);
-}
-inline bool operator<(QuicTime lhs, QuicTime rhs) {
-  return lhs.time_ < rhs.time_;
-}
-inline bool operator>(QuicTime lhs, QuicTime rhs) {
-  return rhs < lhs;
-}
-inline bool operator<=(QuicTime lhs, QuicTime rhs) {
-  return !(rhs < lhs);
-}
-inline bool operator>=(QuicTime lhs, QuicTime rhs) {
-  return !(lhs < rhs);
-}
-
-// Non-member arithmetic operators for QuicTime::Delta.
-inline QuicTime::Delta operator+(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return QuicTime::Delta(lhs.time_offset_ + rhs.time_offset_);
-}
-inline QuicTime::Delta operator-(QuicTime::Delta lhs, QuicTime::Delta rhs) {
-  return QuicTime::Delta(lhs.time_offset_ - rhs.time_offset_);
-}
-inline QuicTime::Delta operator*(QuicTime::Delta lhs, int rhs) {
-  return QuicTime::Delta(lhs.time_offset_ * rhs);
-}
-inline QuicTime::Delta operator*(QuicTime::Delta lhs, double rhs) {
-  return QuicTime::Delta(lhs.time_offset_ * rhs);
-}
-inline QuicTime::Delta operator*(int lhs, QuicTime::Delta rhs) {
-  return rhs * lhs;
-}
-inline QuicTime::Delta operator*(double lhs, QuicTime::Delta rhs) {
-  return rhs * lhs;
-}
-
-// Non-member arithmetic operators for QuicTime and QuicTime::Delta.
-inline QuicTime operator+(QuicTime lhs, QuicTime::Delta rhs) {
-  return QuicTime(lhs.time_ + rhs.time_offset_);
-}
-inline QuicTime operator-(QuicTime lhs, QuicTime::Delta rhs) {
-  return QuicTime(lhs.time_ - rhs.time_offset_);
-}
-inline QuicTime::Delta operator-(QuicTime lhs, QuicTime rhs) {
-  return QuicTime::Delta(lhs.time_ - rhs.time_);
-}
-
-}  // namespace net
-
-#endif  // NET_QUIC_QUIC_TIME_H_