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#include "base/profiler/alternate_timer.h"
6
7#include "base/logging.h"
8
9namespace {
10
11tracked_objects::NowFunction* g_time_function = NULL;
12tracked_objects::TimeSourceType g_time_source_type =
13    tracked_objects::TIME_SOURCE_TYPE_WALL_TIME;
14
15}  // anonymous namespace
16
17namespace tracked_objects {
18
19const char kAlternateProfilerTime[] = "CHROME_PROFILER_TIME";
20
21// Set an alternate timer function to replace the OS time function when
22// profiling.
23void SetAlternateTimeSource(NowFunction* now_function, TimeSourceType type) {
24  DCHECK_EQ(reinterpret_cast<NowFunction*>(NULL), g_time_function);
25  g_time_function = now_function;
26  g_time_source_type = type;
27}
28
29NowFunction* GetAlternateTimeSource() {
30  return g_time_function;
31}
32
33TimeSourceType GetTimeSourceType() {
34  return g_time_source_type;
35}
36
37}  // namespace tracked_objects
38