base/test/simple_test_tick_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 BASE_SIMPLE_TEST_TICK_CLOCK_H_
   6 #define BASE_SIMPLE_TEST_TICK_CLOCK_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/synchronization/lock.h"
  10 #include "base/time/tick_clock.h"
  11 #include "base/time/time.h"
  12
  13 namespace base {
  14
  15 // SimpleTestTickClock is a TickClock implementation that gives
  16 // control over the returned TimeTicks objects.  All methods may be
  17 // called from any thread.
  18 class SimpleTestTickClock : public TickClock {
  19  public:
  20   // Starts off with a clock set to TimeTicks().
  21   SimpleTestTickClock();
  22   virtual ~SimpleTestTickClock();
  23
  24   virtual TimeTicks NowTicks() OVERRIDE;
  25
  26   // Advances the clock by |delta|, which must not be negative.
  27   void Advance(TimeDelta delta);
  28
  29  private:
  30   // Protects |now_ticks_|.
  31   Lock lock_;
  32
  33   TimeTicks now_ticks_;
  34 };
  35
  36 }  // namespace base
  37
  38 #endif  // BASE_SIMPLE_TEST_TICK_CLOCK_H_