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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NET_QUIC_QUIC_CLOCK_H_ | |
6 #define NET_QUIC_QUIC_CLOCK_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "net/base/net_export.h" | |
10 #include "net/quic/quic_time.h" | |
11 | |
12 namespace net { | |
13 | |
14 typedef double WallTime; | |
15 | |
16 // Clock to efficiently retrieve an approximately accurate time from an | |
17 // EpollServer. | |
18 class NET_EXPORT_PRIVATE QuicClock { | |
19 public: | |
20 QuicClock(); | |
21 virtual ~QuicClock(); | |
22 | |
23 // Returns the approximate current time as a QuicTime object. | |
24 virtual QuicTime ApproximateNow() const; | |
25 | |
26 // Returns the current time as a QuicTime object. | |
27 // Note: this use significant resources please use only if needed. | |
28 virtual QuicTime Now() const; | |
29 | |
30 // WallNow returns the current wall-time - a time that is consistent across | |
31 // different clocks. | |
32 virtual QuicWallTime WallNow() const; | |
33 | |
34 private: | |
35 DISALLOW_COPY_AND_ASSIGN(QuicClock); | |
36 }; | |
37 | |
38 } // namespace net | |
39 | |
40 #endif // NET_QUIC_QUIC_CLOCK_H_ | |
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