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      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 (at) google.com (Petter Strandmark)
     30 
     31 #include "ceres/wall_time.h"
     32 
     33 #ifdef CERES_USE_OPENMP
     34 #include <omp.h>
     35 #else
     36 #include <ctime>
     37 #endif
     38 
     39 #ifdef _WIN32
     40 #include <windows.h>
     41 #else
     42 #include <sys/time.h>
     43 #endif
     44 
     45 namespace ceres {
     46 namespace internal {
     47 
     48 double WallTimeInSeconds() {
     49 #ifdef CERES_USE_OPENMP
     50   return omp_get_wtime();
     51 #else
     52 #ifdef _WIN32
     53   return static_cast<double>(std::time(NULL));
     54 #else
     55   timeval time_val;
     56   gettimeofday(&time_val, NULL);
     57   return (time_val.tv_sec + time_val.tv_usec * 1e-6);
     58 #endif
     59 #endif
     60 }
     61 
     62 EventLogger::EventLogger(const string& logger_name)
     63     : start_time_(WallTimeInSeconds()),
     64       last_event_time_(start_time_),
     65       events_("") {
     66   StringAppendF(&events_,
     67                 "\n%s\n                                   Delta   Cumulative\n",
     68                 logger_name.c_str());
     69 }
     70 
     71 EventLogger::~EventLogger() {
     72   if (VLOG_IS_ON(3)) {
     73     AddEvent("Total");
     74     VLOG(2) << "\n" << events_ << "\n";
     75   }
     76 }
     77 
     78 void EventLogger::AddEvent(const string& event_name) {
     79   if (!VLOG_IS_ON(3)) {
     80     return;
     81   }
     82 
     83   const double current_time = WallTimeInSeconds();
     84   const double relative_time_delta = current_time - last_event_time_;
     85   const double absolute_time_delta = current_time - start_time_;
     86   last_event_time_ = current_time;
     87 
     88   StringAppendF(&events_,
     89                 "  %30s : %10.5f   %10.5f\n",
     90                 event_name.c_str(),
     91                 relative_time_delta,
     92                 absolute_time_delta);
     93 }
     94 
     95 }  // namespace internal
     96 }  // namespace ceres
     97