# pf_performance_timer.hpp

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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/>.
    00008  */
    00009
    00012 #ifndef  PF_PERFORMANCE_TIMER_HPP
    00013 #define  PF_PERFORMANCE_TIMER_HPP
    00014
    00015 extern uint64 ottd_rdtsc();
    00016
    00017 struct CPerformanceTimer
    00018 {
    00019   int64    m_start;
    00020   int64    m_acc;
    00021
    00022   CPerformanceTimer() : m_start(0), m_acc(0) {}
    00023
    00024   FORCEINLINE void Start()
    00025   {
    00026     m_start = QueryTime();
    00027   }
    00028
    00029   FORCEINLINE void Stop()
    00030   {
    00031     m_acc += QueryTime() - m_start;
    00032   }
    00033
    00034   FORCEINLINE int Get(int64 coef)
    00035   {
    00036     return (int)(m_acc * coef / QueryFrequency());
    00037   }
    00038
    00039   FORCEINLINE int64 QueryTime()
    00040   {
    00041     return ottd_rdtsc();
    00042   }
    00043
    00044   FORCEINLINE int64 QueryFrequency()
    00045   {
    00046     return ((int64)2200 * 1000000);
    00047   }
    00048 };
    00049
    00050 struct CPerfStartReal
    00051 {
    00052   CPerformanceTimer *m_pperf;
    00053
    00054   FORCEINLINE CPerfStartReal(CPerformanceTimer& perf) : m_pperf(&perf)
    00055   {
    00056     if (m_pperf != NULL) m_pperf->Start();
    00057   }
    00058
    00059   FORCEINLINE ~CPerfStartReal()
    00060   {
    00061     Stop();
    00062   }
    00063
    00064   FORCEINLINE void Stop()
    00065   {
    00066     if (m_pperf != NULL) {
    00067       m_pperf->Stop();
    00068       m_pperf = NULL;
    00069     }
    00070   }
    00071 };
    00072
    00073 struct CPerfStartFake
    00074 {
    00075   FORCEINLINE CPerfStartFake(CPerformanceTimer& perf) {}
    00076   FORCEINLINE ~CPerfStartFake() {}
    00077   FORCEINLINE void Stop() {}
    00078 };
    00079
    00080 typedef CPerfStartFake CPerfStart;
    00081
    00082 #endif /* PF_PERFORMANCE_TIMER_HPP */