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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #include "SysTimer_windows.h" | 7 #include "SysTimer_windows.h" |
8 | 8 |
9 #include <intrin.h> | |
10 | |
11 static ULONGLONG win_cpu_time() { | 9 static ULONGLONG win_cpu_time() { |
12 FILETIME createTime; | 10 FILETIME createTime; |
13 FILETIME exitTime; | 11 FILETIME exitTime; |
14 FILETIME usrTime; | 12 FILETIME usrTime; |
15 FILETIME sysTime; | 13 FILETIME sysTime; |
16 if (0 == GetProcessTimes(GetCurrentProcess(), &createTime, &exitTime, &sysTi
me, &usrTime)) { | 14 if (0 == GetProcessTimes(GetCurrentProcess(), &createTime, &exitTime, &sysTi
me, &usrTime)) { |
17 return 0; | 15 return 0; |
18 } | 16 } |
19 ULARGE_INTEGER start_cpu_sys; | 17 ULARGE_INTEGER start_cpu_sys; |
20 ULARGE_INTEGER start_cpu_usr; | 18 ULARGE_INTEGER start_cpu_usr; |
21 start_cpu_sys.LowPart = sysTime.dwLowDateTime; | 19 start_cpu_sys.LowPart = sysTime.dwLowDateTime; |
22 start_cpu_sys.HighPart = sysTime.dwHighDateTime; | 20 start_cpu_sys.HighPart = sysTime.dwHighDateTime; |
23 start_cpu_usr.LowPart = usrTime.dwLowDateTime; | 21 start_cpu_usr.LowPart = usrTime.dwLowDateTime; |
24 start_cpu_usr.HighPart = usrTime.dwHighDateTime; | 22 start_cpu_usr.HighPart = usrTime.dwHighDateTime; |
25 return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart; | 23 return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart; |
26 } | 24 } |
27 | 25 |
| 26 void SysTimer::startWall() { |
| 27 if (0 == ::QueryPerformanceCounter(&fStartWall)) { |
| 28 fStartWall.QuadPart = 0; |
| 29 } |
| 30 } |
28 void SysTimer::startCpu() { | 31 void SysTimer::startCpu() { |
29 fStartCpu = win_cpu_time(); | 32 fStartCpu = win_cpu_time(); |
30 } | 33 } |
31 | 34 |
32 double SysTimer::endCpu() { | 35 double SysTimer::endCpu() { |
33 ULONGLONG end_cpu = win_cpu_time(); | 36 ULONGLONG end_cpu = win_cpu_time(); |
34 return static_cast<double>(end_cpu - fStartCpu) / 10000.0L; | 37 return static_cast<double>(end_cpu - fStartCpu) / 10000.0L; |
35 } | 38 } |
36 | |
37 static void wall_timestamp(LARGE_INTEGER* now) { | |
38 _ReadWriteBarrier(); | |
39 if (0 == ::QueryPerformanceCounter(now)) { | |
40 now->QuadPart = 0; | |
41 } | |
42 _ReadWriteBarrier(); | |
43 } | |
44 | |
45 void SysTimer::startWall() { | |
46 wall_timestamp(&fStartWall); | |
47 } | |
48 | |
49 double SysTimer::endWall() { | 39 double SysTimer::endWall() { |
50 LARGE_INTEGER end_wall; | 40 LARGE_INTEGER end_wall; |
51 wall_timestamp(&end_wall); | 41 if (0 == ::QueryPerformanceCounter(&end_wall)) { |
| 42 end_wall.QuadPart = 0; |
| 43 } |
52 | 44 |
53 LARGE_INTEGER ticks_elapsed; | 45 LARGE_INTEGER ticks_elapsed; |
54 ticks_elapsed.QuadPart = end_wall.QuadPart - fStartWall.QuadPart; | 46 ticks_elapsed.QuadPart = end_wall.QuadPart - fStartWall.QuadPart; |
55 | 47 |
56 LARGE_INTEGER frequency; | 48 LARGE_INTEGER frequency; |
57 if (0 == ::QueryPerformanceFrequency(&frequency)) { | 49 if (0 == ::QueryPerformanceFrequency(&frequency)) { |
58 return 0.0L; | 50 return 0.0L; |
59 } else { | 51 } else { |
60 return static_cast<double>(ticks_elapsed.QuadPart) | 52 return static_cast<double>(ticks_elapsed.QuadPart) |
61 / static_cast<double>(frequency.QuadPart) | 53 / static_cast<double>(frequency.QuadPart) |
62 * 1000.0L; | 54 * 1000.0L; |
63 } | 55 } |
64 } | 56 } |
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