OpenTTD Source: src/pathfinder/pf_performance_timer.hpp Source File

OpenTTD Source 1.11.0-RC1

pf_performance_timer.hpp
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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
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 */
CPerfStartReal
Definition: pf_performance_timer.hpp:48
CPerfStartFake
Definition: pf_performance_timer.hpp:71
CPerformanceTimer
Definition: pf_performance_timer.hpp:15
ottd_rdtsc
uint64 ottd_rdtsc()
Get the tick counter from the CPU (high precision timing).
Definition: cpu.cpp:86