1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55


base / timer / elapsed_timer.cc [blame]

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/timer/elapsed_timer.h"

#include "base/check.h"

namespace base {

namespace {
bool g_mock_elapsed_timers_for_test = false;
}  // namespace

ElapsedTimer::ElapsedTimer() : start_time_(TimeTicks::Now()) {}

ElapsedTimer::ElapsedTimer(ElapsedTimer&& other)
    : start_time_(other.start_time_) {}

void ElapsedTimer::operator=(ElapsedTimer&& other) {
  start_time_ = other.start_time_;
}

TimeDelta ElapsedTimer::Elapsed() const {
  if (g_mock_elapsed_timers_for_test)
    return ScopedMockElapsedTimersForTest::kMockElapsedTime;
  return TimeTicks::Now() - start_time_;
}

ElapsedThreadTimer::ElapsedThreadTimer()
    : is_supported_(ThreadTicks::IsSupported()),
      begin_(is_supported_ ? ThreadTicks::Now() : ThreadTicks()) {}

TimeDelta ElapsedThreadTimer::Elapsed() const {
  if (!is_supported_)
    return TimeDelta();
  if (g_mock_elapsed_timers_for_test)
    return ScopedMockElapsedTimersForTest::kMockElapsedTime;
  return ThreadTicks::Now() - begin_;
}

// static
constexpr TimeDelta ScopedMockElapsedTimersForTest::kMockElapsedTime;

ScopedMockElapsedTimersForTest::ScopedMockElapsedTimersForTest() {
  DCHECK(!g_mock_elapsed_timers_for_test);
  g_mock_elapsed_timers_for_test = true;
}

ScopedMockElapsedTimersForTest::~ScopedMockElapsedTimersForTest() {
  DCHECK(g_mock_elapsed_timers_for_test);
  g_mock_elapsed_timers_for_test = false;
}

}  // namespace base