15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_PROFILER_TRACKED_TIME_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_PROFILER_TRACKED_TIME_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base_export.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 11eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/time/time.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace tracked_objects { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TimeTicks maintains a wasteful 64 bits of data (we need less than 32), and on 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// windows, a 64 bit timer is expensive to even obtain. We use a simple 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// millisecond counter for most of our time values, as well as millisecond units 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// of duration between those values. This means we can only handle durations 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// up to 49 days (range), or 24 days (non-negative time durations). 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We only define enough methods to service the needs of the tracking classes, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and our interfaces are modeled after what TimeTicks and TimeDelta use (so we 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// can swap them into place if we want to use the "real" classes). 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT Duration { // Similar to base::TimeDelta. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Duration(); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Duration& operator+=(const Duration& other); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Duration operator+(const Duration& other) const; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator==(const Duration& other) const; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator!=(const Duration& other) const; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator>(const Duration& other) const; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static Duration FromMilliseconds(int ms); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32 InMilliseconds() const; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) friend class TrackedTime; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit Duration(int32 duration); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Internal time is stored directly in milliseconds. 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32 ms_; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT TrackedTime { // Similar to base::TimeTicks. 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrackedTime(); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit TrackedTime(const base::TimeTicks& time); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static TrackedTime Now(); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Duration operator-(const TrackedTime& other) const; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrackedTime operator+(const Duration& other) const; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool is_null() const; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static TrackedTime FromMilliseconds(int32 ms) { return TrackedTime(ms); } 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) friend class Duration; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit TrackedTime(int32 ms); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Internal duration is stored directly in milliseconds. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 ms_; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace tracked_objects 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_PROFILER_TRACKED_TIME_H_ 72