net/tools/quic/quic_epoll_clock.h

   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_TOOLS_QUIC_QUIC_EPOLL_CLOCK_H_
   6 #define NET_TOOLS_QUIC_QUIC_EPOLL_CLOCK_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "net/quic/quic_clock.h"
  11 #include "net/quic/quic_time.h"
  12
  13 namespace net {
  14
  15 class EpollServer;
  16
  17 namespace tools {
  18
  19 // Clock to efficiently retrieve an approximately accurate time from an
  20 // EpollServer.
  21 class QuicEpollClock : public QuicClock {
  22  public:
  23   explicit QuicEpollClock(EpollServer* epoll_server);
  24   ~QuicEpollClock() override;
  25
  26   // Returns the approximate current time as a QuicTime object.
  27   QuicTime ApproximateNow() const override;
  28
  29   // Returns the current time as a QuicTime object.
  30   // Note: this use significant resources please use only if needed.
  31   QuicTime Now() const override;
  32
  33  protected:
  34   EpollServer* epoll_server_;
  35
  36  private:
  37   DISALLOW_COPY_AND_ASSIGN(QuicEpollClock);
  38 };
  39
  40 }  // namespace tools
  41 }  // namespace net
  42
  43 #endif  // NET_TOOLS_QUIC_QUIC_EPOLL_CLOCK_H_