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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 //
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
6 // the license.
7 //-----------------------------------------------------------------------------
8 // utilities requiring Posix library functions
9 //-----------------------------------------------------------------------------
10
11 #if !defined(_WIN32)
12 #define _POSIX_C_SOURCE 199309L // need nanosleep()
13 #else
14 #include <windows.h>
15 #endif
16
17 #include "util_posix.h"
18 #include <stdint.h>
19 #include <time.h>
20
21
22 // Timer functions
23 #if !defined (_WIN32)
24 #include <errno.h>
25
26 static void nsleep(uint64_t n) {
27 struct timespec timeout;
28 timeout.tv_sec = n/1000000000;
29 timeout.tv_nsec = n%1000000000;
30 while (nanosleep(&timeout, &timeout) && errno == EINTR);
31 }
32
33 void msleep(uint32_t n) {
34 nsleep(1000000 * (uint64_t)n);
35 }
36 #endif // _WIN32
37
38 #ifdef __APPLE__
39
40 #ifndef CLOCK_MONOTONIC
41 #define CLOCK_MONOTONIC (1)
42 #endif
43 #ifndef CLOCK_REALTIME
44 #define CLOCK_REALTIME (2)
45 #endif
46
47 #include <sys/time.h>
48 #include <mach/clock.h>
49 #include <mach/mach.h>
50 #include <mach/mach_time.h>
51
52 /* clock_gettime is not implemented on OSX prior to 10.12 */
53 int _civet_clock_gettime(int clk_id, struct timespec *t);
54
55 int _civet_clock_gettime(int clk_id, struct timespec *t)
56 {
57 memset(t, 0, sizeof(*t));
58 if (clk_id == CLOCK_REALTIME) {
59 struct timeval now;
60 int rv = gettimeofday(&now, NULL);
61 if (rv) {
62 return rv;
63 }
64 t->tv_sec = now.tv_sec;
65 t->tv_nsec = now.tv_usec * 1000;
66 return 0;
67
68 } else if (clk_id == CLOCK_MONOTONIC) {
69 static uint64_t clock_start_time = 0;
70 static mach_timebase_info_data_t timebase_info = {0, 0};
71
72 uint64_t now = mach_absolute_time();
73
74 if (clock_start_time == 0) {
75 mach_timebase_info(&timebase_info);
76 clock_start_time = now;
77 }
78
79 now = (uint64_t)((double)(now - clock_start_time)
80 * (double)timebase_info.numer
81 / (double)timebase_info.denom);
82
83 t->tv_sec = now / 1000000000;
84 t->tv_nsec = now % 1000000000;
85 return 0;
86 }
87 return -1; // EINVAL - Clock ID is unknown
88 }
89
90 /* if clock_gettime is declared, then __CLOCK_AVAILABILITY will be defined */
91 #ifdef __CLOCK_AVAILABILITY
92 /* If we compiled with Mac OSX 10.12 or later, then clock_gettime will be declared
93 * but it may be NULL at runtime. So we need to check before using it. */
94 int _civet_safe_clock_gettime(int clk_id, struct timespec *t);
95
96 int _civet_safe_clock_gettime(int clk_id, struct timespec *t) {
97 if( clock_gettime ) {
98 return clock_gettime(clk_id, t);
99 }
100 return _civet_clock_gettime(clk_id, t);
101 }
102 #define clock_gettime _civet_safe_clock_gettime
103 #else
104 #define clock_gettime _civet_clock_gettime
105 #endif
106
107 #endif
108
109
110 // a milliseconds timer for performance measurement
111 uint64_t msclock() {
112 #if defined(_WIN32)
113 #include <sys/types.h>
114
115 // WORKAROUND FOR MinGW (some versions - use if normal code does not compile)
116 // It has no _ftime_s and needs explicit inclusion of timeb.h
117 #include <sys/timeb.h>
118 struct _timeb t;
119 _ftime(&t);
120 return 1000 * (uint64_t)t.time + t.millitm;
121
122 // NORMAL CODE (use _ftime_s)
123 //struct _timeb t;
124 //if (_ftime_s(&t)) {
125 // return 0;
126 //} else {
127 // return 1000 * t.time + t.millitm;
128 //}
129 #else
130 struct timespec t;
131 clock_gettime(CLOCK_MONOTONIC, &t);
132 return (t.tv_sec * 1000 + t.tv_nsec / 1000000);
133 #endif
134 }
135
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