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Diffstat (limited to 'base/profiler/tracked_time.h')
-rw-r--r-- | base/profiler/tracked_time.h | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/base/profiler/tracked_time.h b/base/profiler/tracked_time.h deleted file mode 100644 index e8e6d17..0000000 --- a/base/profiler/tracked_time.h +++ /dev/null @@ -1,84 +0,0 @@ -// 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. - -#ifndef BASE_PROFILER_TRACKED_TIME_H_ -#define BASE_PROFILER_TRACKED_TIME_H_ - - -#include "base/base_export.h" -#include "base/basictypes.h" -#include "base/time.h" - -namespace tracked_objects { - -//------------------------------------------------------------------------------ - -#define USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS - -#if defined(USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS) - -// TimeTicks maintains a wasteful 64 bits of data (we need less than 32), and on -// windows, a 64 bit timer is expensive to even obtain. We use a simple -// millisecond counter for most of our time values, as well as millisecond units -// of duration between those values. This means we can only handle durations -// up to 49 days (range), or 24 days (non-negative time durations). -// We only define enough methods to service the needs of the tracking classes, -// and our interfaces are modeled after what TimeTicks and TimeDelta use (so we -// can swap them into place if we want to use the "real" classes). - -class BASE_EXPORT Duration { // Similar to base::TimeDelta. - public: - Duration(); - - Duration& operator+=(const Duration& other); - Duration operator+(const Duration& other) const; - - bool operator==(const Duration& other) const; - bool operator!=(const Duration& other) const; - bool operator>(const Duration& other) const; - - static Duration FromMilliseconds(int ms); - - int32 InMilliseconds() const; - - private: - friend class TrackedTime; - explicit Duration(int32 duration); - - // Internal time is stored directly in milliseconds. - int32 ms_; -}; - -class BASE_EXPORT TrackedTime { // Similar to base::TimeTicks. - public: - TrackedTime(); - explicit TrackedTime(const base::TimeTicks& time); - - static TrackedTime Now(); - Duration operator-(const TrackedTime& other) const; - TrackedTime operator+(const Duration& other) const; - bool is_null() const; - - private: - friend class Duration; - explicit TrackedTime(int32 ms); - - // Internal duration is stored directly in milliseconds. - uint32 ms_; -}; - -#else - -// Just use full 64 bit time calculations, and the slower TimeTicks::Now(). -// This allows us (as an alternative) to test with larger ranges of times, and -// with a more thoroughly tested class. - -typedef base::TimeTicks TrackedTime; -typedef base::TimeDelta Duration; - -#endif // USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS - -} // namespace tracked_objects - -#endif // BASE_PROFILER_TRACKED_TIME_H_ |