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 40 namespace ceres { 41 namespace 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. 47 double 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; 73 class 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