QuicTime integration

Merge internal change: 37669847


Review URL: https://chromiumcodereview.appspot.com/11293161

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@167124 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 128 insertions, 0 deletions

diff --git a/net/quic/quic_time.h b/net/quic/quic_time.h
new file mode 100644
index 0000000..becb3b2
--- /dev/null
+++ b/net/quic/quic_time.h
@@ -0,0 +1,128 @@
+// 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.
+// This class wrapps the classes DateTimeO and DateTimeOffset.
+
+#ifndef NET_QUIC_QUIC_TIME_H_
+#define NET_QUIC_QUIC_TIME_H_
+
+#include "base/basictypes.h"
+#include "base/time.h"
+#include "net/base/net_export.h"
+
+namespace net {
+
+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:
+    // Default constructor initiates to 0.
+    Delta();
+
+    explicit Delta(base::TimeDelta delta);
+
+    // Create a object with infinite offset time.
+    static Delta Infinite();
+
+    // Converts a number of milliseconds to a time offset.
+    static Delta FromMilliseconds(int64 ms);
+
+    // Converts a number of microseconds to a time offset.
+    static Delta FromMicroseconds(int64 us);
+
+    // Converts the time offset to a rounded number of milliseconds.
+    int64 ToMilliseconds() const;
+
+    // Converts the time offset to a rounded number of microseconds.
+    int64 ToMicroseconds() const;
+
+    Delta Add(const Delta& delta) const;
+
+    Delta Subtract(const Delta& delta) const;
+
+    bool IsZero() const;
+
+    bool IsInfinite() const;
+
+   private:
+    base::TimeDelta delta_;
+
+    friend class QuicTime;
+  };
+
+  // Default constructor initiates to 0.
+  QuicTime();
+
+  explicit QuicTime(base::TimeTicks ticks);
+
+  // Create a new QuicTime holding the time_ms.
+  static QuicTime FromMilliseconds(uint64 time_ms);
+
+  // Create a new QuicTime holding the time_us.
+  static QuicTime FromMicroseconds(uint64 time_us);
+
+  uint64 ToMilliseconds() const;
+
+  uint64 ToMicroseconds() const;
+
+  bool IsInitialized() const;
+
+  QuicTime Add(const Delta& delta) const;
+
+  QuicTime Subtract(const Delta& delta) const;
+
+  Delta Subtract(const QuicTime& other) const;
+
+ private:
+  base::TimeTicks ticks_;
+
+  friend class QuicClock;
+  friend class QuicClockTest;
+};
+
+// Non-member relational operators for QuicTime::Delta.
+inline bool operator==(QuicTime::Delta lhs, QuicTime::Delta rhs) {
+  return lhs.ToMicroseconds() == rhs.ToMicroseconds();
+}
+inline bool operator!=(QuicTime::Delta lhs, QuicTime::Delta rhs) {
+  return !(lhs == rhs);
+}
+inline bool operator<(QuicTime::Delta lhs, QuicTime::Delta rhs) {
+  return lhs.ToMicroseconds() < rhs.ToMicroseconds();
+}
+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);
+}
+// Non-member relational operators for QuicTime.
+inline bool operator==(QuicTime lhs, QuicTime rhs) {
+  return lhs.ToMicroseconds() == rhs.ToMicroseconds();
+}
+inline bool operator!=(QuicTime lhs, QuicTime rhs) {
+  return !(lhs == rhs);
+}
+inline bool operator<(QuicTime lhs, QuicTime rhs) {
+  return lhs.ToMicroseconds() < rhs.ToMicroseconds();
+}
+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);
+}
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_TIME_H_