1// Ceres Solver - A fast non-linear least squares minimizer 2// Copyright 2012 Google Inc. All rights reserved. 3// http://code.google.com/p/ceres-solver/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are met: 7// 8// * Redistributions of source code must retain the above copyright notice, 9// this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above copyright notice, 11// this list of conditions and the following disclaimer in the documentation 12// and/or other materials provided with the distribution. 13// * Neither the name of Google Inc. nor the names of its contributors may be 14// used to endorse or promote products derived from this software without 15// specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27// POSSIBILITY OF SUCH DAMAGE. 28// 29// Author: strandmark@google.com (Petter Strandmark) 30 31#ifndef CERES_INTERNAL_WALL_TIME_H_ 32#define CERES_INTERNAL_WALL_TIME_H_ 33 34#include <map> 35#include <string> 36#include "ceres/internal/port.h" 37#include "ceres/stringprintf.h" 38#include "glog/logging.h" 39 40namespace ceres { 41namespace internal { 42 43// Returns time, in seconds, from some arbitrary starting point. If 44// OpenMP is available then the high precision openmp_get_wtime() 45// function is used. Otherwise on unixes, gettimeofday is used. The 46// granularity is in seconds on windows systems. 47double WallTimeInSeconds(); 48 49// Log a series of events, recording for each event the time elapsed 50// since the last event and since the creation of the object. 51// 52// The information is output to VLOG(3) upon destruction. A 53// name::Total event is added as the final event right before 54// destruction. 55// 56// Example usage: 57// 58// void Foo() { 59// EventLogger event_logger("Foo"); 60// Bar1(); 61// event_logger.AddEvent("Bar1") 62// Bar2(); 63// event_logger.AddEvent("Bar2") 64// Bar3(); 65// } 66// 67// Will produce output that looks like 68// 69// Foo 70// Bar1: time1 time1 71// Bar2: time2 time1 + time2; 72// Total: time3 time1 + time2 + time3; 73class EventLogger { 74 public: 75 explicit EventLogger(const string& logger_name); 76 ~EventLogger(); 77 void AddEvent(const string& event_name); 78 79 private: 80 const double start_time_; 81 double last_event_time_; 82 string events_; 83}; 84 85} // namespace internal 86} // namespace ceres 87 88#endif // CERES_INTERNAL_WALL_TIME_H_ 89