src/pathfinder/pf_performance_timer.hpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file pf_performance_timer.hpp Performance timer for pathfinders. */
   9
  10 #ifndef PF_PERFORMANCE_TIMER_HPP
  11 #define PF_PERFORMANCE_TIMER_HPP
  12
  13 #include "../debug.h"
  14
  15 struct CPerformanceTimer
  16 {
  17         int64    m_start;
  18         int64    m_acc;
  19
  20         CPerformanceTimer() : m_start(0), m_acc(0) {}
  21
  22         inline void Start()
  23         {
  24                 m_start = QueryTime();
  25         }
  26
  27         inline void Stop()
  28         {
  29                 m_acc += QueryTime() - m_start;
  30         }
  31
  32         inline int Get(int64 coef)
  33         {
  34                 return (int)(m_acc * coef / QueryFrequency());
  35         }
  36
  37         inline int64 QueryTime()
  38         {
  39                 return ottd_rdtsc();
  40         }
  41
  42         inline int64 QueryFrequency()
  43         {
  44                 return ((int64)2200 * 1000000);
  45         }
  46 };
  47
  48 struct CPerfStartReal
  49 {
  50         CPerformanceTimer *m_pperf;
  51
  52         inline CPerfStartReal(CPerformanceTimer& perf) : m_pperf(&perf)
  53         {
  54                 if (m_pperf != nullptr) m_pperf->Start();
  55         }
  56
  57         inline ~CPerfStartReal()
  58         {
  59                 Stop();
  60         }
  61
  62         inline void Stop()
  63         {
  64                 if (m_pperf != nullptr) {
  65                         m_pperf->Stop();
  66                         m_pperf = nullptr;
  67                 }
  68         }
  69 };
  70
  71 struct CPerfStartFake
  72 {
  73         inline CPerfStartFake(CPerformanceTimer& perf) {}
  74         inline ~CPerfStartFake() {}
  75         inline void Stop() {}
  76 };
  77
  78 typedef CPerfStartFake CPerfStart;
  79
  80 #endif /* PF_PERFORMANCE_TIMER_HPP */