base/timer/elapsed_timer.h

   1 // Copyright 2013 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_TIMER_ELAPSED_TIMER_H_
   6 #define BASE_TIMER_ELAPSED_TIMER_H_
   7
   8 #include "base/base_export.h"
   9 #include "base/basictypes.h"
  10 #include "base/time/time.h"
  11
  12 namespace base {
  13
  14 // A simple wrapper around TimeTicks::Now().
  15 class BASE_EXPORT ElapsedTimer {
  16  public:
  17   ElapsedTimer();
  18   virtual ~ElapsedTimer() {}
  19
  20   // Returns the time elapsed since object construction.
  21   virtual TimeDelta Elapsed() const;
  22
  23  private:
  24   TimeTicks begin_;
  25
  26   DISALLOW_COPY_AND_ASSIGN(ElapsedTimer);
  27 };
  28
  29 }  // namespace base
  30
  31 #endif  // BASE_TIMER_ELAPSED_TIMER_H_