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9f95a23c | 1 | /* |
f67539c2 | 2 | * Copyright (c) 2019-2020, Yann Collet, Facebook, Inc. |
9f95a23c TL |
3 | * All rights reserved. |
4 | * | |
5 | * This source code is licensed under both the BSD-style license (found in the | |
6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found | |
7 | * in the COPYING file in the root directory of this source tree). | |
8 | * You may select, at your option, one of the above-listed licenses. | |
9 | */ | |
10 | ||
11 | ||
12 | /* === Dependencies === */ | |
13 | ||
14 | #include "timefn.h" | |
15 | ||
16 | ||
17 | /*-**************************************** | |
18 | * Time functions | |
19 | ******************************************/ | |
20 | ||
21 | #if defined(_WIN32) /* Windows */ | |
22 | ||
23 | #include <stdlib.h> /* abort */ | |
24 | #include <stdio.h> /* perror */ | |
25 | ||
26 | UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; } | |
27 | ||
28 | PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) | |
29 | { | |
30 | static LARGE_INTEGER ticksPerSecond; | |
31 | static int init = 0; | |
32 | if (!init) { | |
33 | if (!QueryPerformanceFrequency(&ticksPerSecond)) { | |
34 | perror("timefn::QueryPerformanceFrequency"); | |
35 | abort(); | |
36 | } | |
37 | init = 1; | |
38 | } | |
39 | return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; | |
40 | } | |
41 | ||
42 | PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) | |
43 | { | |
44 | static LARGE_INTEGER ticksPerSecond; | |
45 | static int init = 0; | |
46 | if (!init) { | |
47 | if (!QueryPerformanceFrequency(&ticksPerSecond)) { | |
48 | perror("timefn::QueryPerformanceFrequency"); | |
49 | abort(); | |
50 | } | |
51 | init = 1; | |
52 | } | |
53 | return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; | |
54 | } | |
55 | ||
56 | ||
57 | ||
58 | #elif defined(__APPLE__) && defined(__MACH__) | |
59 | ||
60 | UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } | |
61 | ||
62 | PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) | |
63 | { | |
64 | static mach_timebase_info_data_t rate; | |
65 | static int init = 0; | |
66 | if (!init) { | |
67 | mach_timebase_info(&rate); | |
68 | init = 1; | |
69 | } | |
70 | return (((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom))/1000ULL; | |
71 | } | |
72 | ||
73 | PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) | |
74 | { | |
75 | static mach_timebase_info_data_t rate; | |
76 | static int init = 0; | |
77 | if (!init) { | |
78 | mach_timebase_info(&rate); | |
79 | init = 1; | |
80 | } | |
81 | return ((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom); | |
82 | } | |
83 | ||
84 | ||
f67539c2 TL |
85 | /* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance. |
86 | Android also lacks it but does define TIME_UTC. */ | |
9f95a23c | 87 | #elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \ |
f67539c2 | 88 | && defined(TIME_UTC) && !defined(__ANDROID__) |
9f95a23c TL |
89 | |
90 | #include <stdlib.h> /* abort */ | |
91 | #include <stdio.h> /* perror */ | |
92 | ||
93 | UTIL_time_t UTIL_getTime(void) | |
94 | { | |
95 | /* time must be initialized, othersize it may fail msan test. | |
96 | * No good reason, likely a limitation of timespec_get() for some target */ | |
97 | UTIL_time_t time = UTIL_TIME_INITIALIZER; | |
98 | if (timespec_get(&time, TIME_UTC) != TIME_UTC) { | |
99 | perror("timefn::timespec_get"); | |
100 | abort(); | |
101 | } | |
102 | return time; | |
103 | } | |
104 | ||
105 | static UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) | |
106 | { | |
107 | UTIL_time_t diff; | |
108 | if (end.tv_nsec < begin.tv_nsec) { | |
109 | diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; | |
110 | diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; | |
111 | } else { | |
112 | diff.tv_sec = end.tv_sec - begin.tv_sec; | |
113 | diff.tv_nsec = end.tv_nsec - begin.tv_nsec; | |
114 | } | |
115 | return diff; | |
116 | } | |
117 | ||
118 | PTime UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) | |
119 | { | |
120 | UTIL_time_t const diff = UTIL_getSpanTime(begin, end); | |
121 | PTime micro = 0; | |
122 | micro += 1000000ULL * diff.tv_sec; | |
123 | micro += diff.tv_nsec / 1000ULL; | |
124 | return micro; | |
125 | } | |
126 | ||
127 | PTime UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) | |
128 | { | |
129 | UTIL_time_t const diff = UTIL_getSpanTime(begin, end); | |
130 | PTime nano = 0; | |
131 | nano += 1000000000ULL * diff.tv_sec; | |
132 | nano += diff.tv_nsec; | |
133 | return nano; | |
134 | } | |
135 | ||
136 | ||
137 | ||
138 | #else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */ | |
139 | ||
140 | UTIL_time_t UTIL_getTime(void) { return clock(); } | |
141 | PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } | |
142 | PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } | |
143 | ||
144 | #endif | |
145 | ||
146 | ||
147 | ||
148 | /* returns time span in microseconds */ | |
149 | PTime UTIL_clockSpanMicro(UTIL_time_t clockStart ) | |
150 | { | |
151 | UTIL_time_t const clockEnd = UTIL_getTime(); | |
152 | return UTIL_getSpanTimeMicro(clockStart, clockEnd); | |
153 | } | |
154 | ||
155 | /* returns time span in microseconds */ | |
156 | PTime UTIL_clockSpanNano(UTIL_time_t clockStart ) | |
157 | { | |
158 | UTIL_time_t const clockEnd = UTIL_getTime(); | |
159 | return UTIL_getSpanTimeNano(clockStart, clockEnd); | |
160 | } | |
161 | ||
162 | void UTIL_waitForNextTick(void) | |
163 | { | |
164 | UTIL_time_t const clockStart = UTIL_getTime(); | |
165 | UTIL_time_t clockEnd; | |
166 | do { | |
167 | clockEnd = UTIL_getTime(); | |
168 | } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); | |
169 | } |