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/* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file pf_performance_timer.hpp Performance timer for pathfinders. */
#ifndef PF_PERFORMANCE_TIMER_HPP
#define PF_PERFORMANCE_TIMER_HPP
extern uint64 ottd_rdtsc();
struct CPerformanceTimer
{
int64 m_start;
int64 m_acc;
CPerformanceTimer() : m_start(0), m_acc(0) {}
FORCEINLINE void Start()
{
m_start = QueryTime();
}
FORCEINLINE void Stop()
{
m_acc += QueryTime() - m_start;
}
FORCEINLINE int Get(int64 coef)
{
return (int)(m_acc * coef / QueryFrequency());
}
FORCEINLINE int64 QueryTime()
{
return ottd_rdtsc();
}
FORCEINLINE int64 QueryFrequency()
{
return ((int64)2200 * 1000000);
}
};
struct CPerfStartReal
{
CPerformanceTimer *m_pperf;
FORCEINLINE CPerfStartReal(CPerformanceTimer& perf) : m_pperf(&perf)
{
if (m_pperf != NULL) m_pperf->Start();
}
FORCEINLINE ~CPerfStartReal()
{
Stop();
}
FORCEINLINE void Stop()
{
if (m_pperf != NULL) {
m_pperf->Stop();
m_pperf = NULL;
}
}
};
struct CPerfStartFake
{
FORCEINLINE CPerfStartFake(CPerformanceTimer& perf) {}
FORCEINLINE ~CPerfStartFake() {}
FORCEINLINE void Stop() {}
};
typedef CPerfStartFake CPerfStart;
#endif /* PF_PERFORMANCE_TIMER_HPP */
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