Index: base/profiler/tracked_time.cc |
=================================================================== |
--- base/profiler/tracked_time.cc (revision 0) |
+++ base/profiler/tracked_time.cc (revision 0) |
@@ -0,0 +1,80 @@ |
+// Copyright (c) 2011 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "base/profiler/tracked_time.h" |
+ |
+#include "build/build_config.h" |
+ |
+#if defined(OS_WIN) |
+#include <mmsystem.h> // Declare timeGetTime()... after including build_config. |
+#endif |
+ |
+namespace tracked_objects { |
+ |
+#if defined(USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS) |
+ |
+Duration::Duration() : ms_(0) {} |
+Duration::Duration(int32 duration) : ms_(duration) {} |
+ |
+Duration& Duration::operator+=(const Duration& other) { |
+ ms_ += other.ms_; |
+ return *this; |
+} |
+ |
+Duration Duration::operator+(const Duration& other) const { |
+ return Duration(ms_ + other.ms_); |
+} |
+ |
+bool Duration::operator==(const Duration& other) const { |
+ return ms_ == other.ms_; |
+} |
+ |
+bool Duration::operator!=(const Duration& other) const { |
+ return ms_ != other.ms_; |
+} |
+ |
+bool Duration::operator>(const Duration& other) const { |
+ return ms_ > other.ms_; |
+} |
+ |
+// static |
+Duration Duration::FromMilliseconds(int ms) { return Duration(ms); } |
+ |
+int32 Duration::InMilliseconds() const { return ms_; } |
+ |
+//------------------------------------------------------------------------------ |
+ |
+TrackedTime::TrackedTime() : ms_(0) {} |
+TrackedTime::TrackedTime(int32 ms) : ms_(ms) {} |
+TrackedTime::TrackedTime(const base::TimeTicks& time) |
+ : ms_((time - base::TimeTicks()).InMilliseconds()) { |
+} |
+ |
+// static |
+TrackedTime TrackedTime::Now() { |
+#if defined(OS_WIN) |
+ // Use lock-free accessor to 32 bit time. |
+ // Note that TimeTicks::Now() is built on this, so we have "compatible" |
+ // times when we down-convert a TimeTicks sample. |
+ // TODO(jar): Surface this interface via something in base/time.h. |
+ return TrackedTime(static_cast<int32>(timeGetTime())); |
+#else |
+ // Posix has nice cheap 64 bit times, so we just down-convert it. |
+ return TrackedTime(base::TimeTicks::Now()); |
+#endif // OS_WIN |
+} |
+ |
+Duration TrackedTime::operator-(const TrackedTime& other) const { |
+ return Duration(ms_ - other.ms_); |
+} |
+ |
+TrackedTime TrackedTime::operator+(const Duration& other) const { |
+ return TrackedTime(ms_ + other.ms_); |
+} |
+ |
+bool TrackedTime::is_null() const { return ms_ == 0; } |
+ |
+#endif // USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS |
+ |
+} // namespace tracked_objects |