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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef GFE_QUIC_QUIC_EPOLL_CLOCK_H_ | 5 #ifndef GFE_QUIC_QUIC_EPOLL_CLOCK_H_ |
6 #define GFE_QUIC_QUIC_EPOLL_CLOCK_H_ | 6 #define GFE_QUIC_QUIC_EPOLL_CLOCK_H_ |
7 | 7 |
8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
9 #include "net/quic/quic_clock.h" | 9 #include "net/quic/quic_clock.h" |
10 #include "net/quic/quic_time.h" | 10 #include "net/quic/quic_time.h" |
11 | 11 |
12 namespace net { | 12 namespace net { |
13 | 13 |
14 class EpollServer; | 14 class EpollServer; |
15 | 15 |
| 16 namespace tools { |
| 17 |
16 // Clock to efficiently retrieve an approximately accurate time from an | 18 // Clock to efficiently retrieve an approximately accurate time from an |
17 // EpollServer. | 19 // EpollServer. |
18 class QuicEpollClock : public QuicClock { | 20 class QuicEpollClock : public QuicClock { |
19 public: | 21 public: |
20 explicit QuicEpollClock(EpollServer* epoll_server); | 22 explicit QuicEpollClock(EpollServer* epoll_server); |
21 virtual ~QuicEpollClock(); | 23 virtual ~QuicEpollClock(); |
22 | 24 |
23 // Returns the approximate current time as a QuicTime object. | 25 // Returns the approximate current time as a QuicTime object. |
24 virtual QuicTime ApproximateNow() const OVERRIDE; | 26 virtual QuicTime ApproximateNow() const OVERRIDE; |
25 | 27 |
26 // Returns the current time as a QuicTime object. | 28 // Returns the current time as a QuicTime object. |
27 // Note: this use significant resources please use only if needed. | 29 // Note: this use significant resources please use only if needed. |
28 virtual QuicTime Now() const OVERRIDE; | 30 virtual QuicTime Now() const OVERRIDE; |
29 | 31 |
30 // Returns the current time as an offset from the Unix epoch (1970-01-01 | 32 // Returns the current time as an offset from the Unix epoch (1970-01-01 |
31 // 00:00:00 GMT). This function may return a smaller Delta in subsequent | 33 // 00:00:00 GMT). This function may return a smaller Delta in subsequent |
32 // calls if the system clock is changed. | 34 // calls if the system clock is changed. |
33 virtual QuicTime::Delta NowAsDeltaSinceUnixEpoch() const OVERRIDE; | 35 virtual QuicTime::Delta NowAsDeltaSinceUnixEpoch() const OVERRIDE; |
34 | 36 |
35 protected: | 37 protected: |
36 EpollServer* epoll_server_; | 38 EpollServer* epoll_server_; |
37 }; | 39 }; |
38 | 40 |
| 41 } // namespace tools |
39 } // namespace net | 42 } // namespace net |
40 | 43 |
41 #endif // GFE_QUIC_QUIC_EPOLL_CLOCK_H_ | 44 #endif // GFE_QUIC_QUIC_EPOLL_CLOCK_H_ |
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