1 /* xbt_os_time.c -- portable interface to time-related functions */
3 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "src/internal_config.h"
9 #include "xbt/sysdep.h"
11 #include "xbt/xbt_os_time.h" /* this module */
12 #include <math.h> /* floor */
17 #include <sys/timeb.h>
23 //Freebsd doesn't provide this clock_gettime flag yet, because it was added too recently (after 1993)
24 #if defined (CLOCK_PROF) && ! defined (CLOCK_PROCESS_CPUTIME_ID)
25 #define CLOCK_PROCESS_CPUTIME_ID CLOCK_PROF
28 #if defined(__APPLE__) && defined(__MACH__)
29 #include <sys/types.h>
30 #include <sys/sysctl.h>
31 #include <mach/mach_init.h>
32 #include <mach/mach_host.h>
33 #include <mach/mach_port.h>
34 #include <mach/mach_traps.h>
35 #include <mach/task_info.h>
36 #include <mach/thread_info.h>
37 #include <mach/thread_act.h>
38 #include <mach/vm_region.h>
39 #include <mach/vm_map.h>
40 #include <mach/task.h>
44 static void w32_time_to_timeval(struct timeval* tv, const FILETIME* ft)
47 tm = (unsigned __int64)ft->dwHighDateTime << 32;
48 tm |= ft->dwLowDateTime;
50 tm -= 11644473600000000ULL;
51 tv->tv_sec = (long)(tm / 1000000L);
52 tv->tv_usec = (long)(tm % 1000000L);
55 static void w32_times_to_timeval(struct timeval* tv, const FILETIME* kernel_time, const FILETIME* user_time)
57 unsigned __int64 ktm, utm;
58 ktm = (unsigned __int64)kernel_time->dwHighDateTime << 32;
59 ktm |= kernel_time->dwLowDateTime;
61 utm = (unsigned __int64)user_time->dwHighDateTime << 32;
62 utm |= user_time->dwLowDateTime;
64 tv->tv_sec = (long)(ktm / 1000000L) + (long)(utm / 1000000L);
65 tv->tv_usec = (long)(ktm % 1000000L) + (long)(utm % 1000000L);
69 double xbt_os_time(void)
73 gettimeofday(&tv, NULL);
77 GetSystemTimeAsFileTime(&ft);
78 w32_time_to_timeval(&tv, &ft);
79 #else /* not windows, no gettimeofday => poor resolution */
80 return (double) (time(NULL));
81 #endif /* HAVE_GETTIMEOFDAY? */
83 return (double) (tv.tv_sec + tv.tv_usec / 1000000.0);
86 void xbt_os_sleep(double sec)
90 Sleep((floor(sec) * 1000) + ((sec - floor(sec)) * 1000));
95 ts.tv_nsec = (sec - floor(sec)) * 1e9;
96 nanosleep (&ts, NULL);
97 #else /* don't have nanosleep. Use select to sleep less than one second */
98 struct timeval timeout;
100 timeout.tv_sec = (unsigned long) (sec);
101 timeout.tv_usec = (sec - floor(sec)) * 1000000;
103 select(0, NULL, NULL, NULL, &timeout);
107 /* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus disabled in SDL source code */
109 /* @defgroup XBT_sysdep All system dependency
110 * @brief This section describes many macros/functions that can serve as an OS abstraction.
112 struct s_xbt_os_timer {
113 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
114 struct timespec start;
115 struct timespec stop;
116 struct timespec elapse;
117 #elif HAVE_GETTIMEOFDAY || defined(_WIN32)
118 struct timeval start;
120 struct timeval elapse;
122 unsigned long int start;
123 unsigned long int stop;
124 unsigned long int elapse;
128 size_t xbt_os_timer_size(void)
130 return sizeof(struct s_xbt_os_timer);
133 xbt_os_timer_t xbt_os_timer_new(void)
135 return xbt_new0(struct s_xbt_os_timer, 1);
138 void xbt_os_timer_free(xbt_os_timer_t timer)
143 double xbt_os_timer_elapsed(xbt_os_timer_t timer)
145 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
146 return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
147 ((((double) timer->stop.tv_nsec) - ((double) timer->start.tv_nsec) + ((double) timer->elapse.tv_nsec )) / 1e9);
148 #elif HAVE_GETTIMEOFDAY || defined(_WIN32)
149 return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
150 ((((double) timer->stop.tv_usec) - ((double) timer->start.tv_usec) + ((double) timer->elapse.tv_usec )) /
153 return (double) timer->stop - (double) timer->start + (double) timer->elapse;
157 void xbt_os_walltimer_start(xbt_os_timer_t timer)
159 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
160 timer->elapse.tv_sec = 0;
161 timer->elapse.tv_nsec = 0;
162 clock_gettime(CLOCK_REALTIME, &(timer->start));
163 #elif HAVE_GETTIMEOFDAY
164 timer->elapse.tv_sec = 0;
165 timer->elapse.tv_usec = 0;
166 gettimeofday(&(timer->start), NULL);
167 #elif defined(_WIN32)
168 timer->elapse.tv_sec = 0;
169 timer->elapse.tv_usec = 0;
171 GetSystemTimeAsFileTime(&ft);
172 w32_time_to_timeval(&timer->start, &ft);
175 timer->start = (unsigned long int) (time(NULL));
179 void xbt_os_walltimer_resume(xbt_os_timer_t timer)
181 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
182 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
184 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
185 clock_gettime(CLOCK_REALTIME, &(timer->start));
186 #elif HAVE_GETTIMEOFDAY
187 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
188 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
189 gettimeofday(&(timer->start), NULL);
190 #elif defined(_WIN32)
191 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
192 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
194 GetSystemTimeAsFileTime(&ft);
195 w32_time_to_timeval(&timer->start, &ft);
197 timer->elapse = timer->stop - timer->start;
198 timer->start = (unsigned long int) (time(NULL));
202 void xbt_os_walltimer_stop(xbt_os_timer_t timer)
204 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
205 clock_gettime(CLOCK_REALTIME, &(timer->stop));
206 #elif HAVE_GETTIMEOFDAY
207 gettimeofday(&(timer->stop), NULL);
208 #elif defined(_WIN32)
210 GetSystemTimeAsFileTime(&ft);
211 w32_time_to_timeval(&timer->stop, &ft);
213 timer->stop = (unsigned long int) (time(NULL));
217 void xbt_os_cputimer_start(xbt_os_timer_t timer)
219 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
220 timer->elapse.tv_sec = 0;
221 timer->elapse.tv_nsec = 0;
222 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
223 #elif HAVE_GETTIMEOFDAY //return time and not cputime in this case
224 timer->elapse.tv_sec = 0;
225 timer->elapse.tv_usec = 0;
226 gettimeofday(&(timer->start), NULL);
227 #elif defined(_WIN32)
228 timer->elapse.tv_sec = 0;
229 timer->elapse.tv_usec = 0;
230 HANDLE h = GetCurrentProcess();
231 FILETIME creationTime, exitTime, kernelTime, userTime;
232 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
233 w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
235 # error The cpu timers of SimGrid do not seem to work on your platform.
239 void xbt_os_cputimer_resume(xbt_os_timer_t timer)
241 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
242 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
243 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
244 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
245 #elif HAVE_GETTIMEOFDAY
246 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
247 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
248 gettimeofday(&(timer->start), NULL);
249 #elif defined(_WIN32)
250 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
251 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
252 HANDLE h = GetCurrentProcess();
253 FILETIME creationTime, exitTime, kernelTime, userTime;
254 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
255 w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
257 # error The cpu timers of SimGrid do not seem to work on your platform.
261 void xbt_os_cputimer_stop(xbt_os_timer_t timer)
263 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
264 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->stop));
265 #elif HAVE_GETTIMEOFDAY
266 gettimeofday(&(timer->stop), NULL);
267 #elif defined(_WIN32)
268 HANDLE h = GetCurrentProcess();
269 FILETIME creationTime, exitTime, kernelTime, userTime;
270 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
271 w32_times_to_timeval(&timer->stop, &kernelTime, &userTime);
273 # error The cpu timers of SimGrid do not seem to work on your platform.
277 void xbt_os_threadtimer_start(xbt_os_timer_t timer)
279 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
280 timer->elapse.tv_sec = 0;
281 timer->elapse.tv_nsec = 0;
282 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
283 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
284 timer->elapse.tv_sec = 0;
285 timer->elapse.tv_usec = 0;
286 mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
287 thread_basic_info_data_t thi_data;
288 thread_basic_info_t thi = &thi_data;
289 thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
290 timer->start.tv_usec = thi->system_time.microseconds + thi->user_time.microseconds;
291 timer->start.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
292 #elif HAVE_GETTIMEOFDAY //return time and not cputime in this case
293 timer->elapse.tv_sec = 0;
294 timer->elapse.tv_usec = 0;
295 gettimeofday(&(timer->start), NULL);
296 #elif defined(_WIN32)
297 HANDLE h = GetCurrentThread();
298 FILETIME creationTime, exitTime, kernelTime, userTime;
299 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
300 w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
302 # error The thread timers of SimGrid do not seem to work on your platform.
306 void xbt_os_threadtimer_resume(xbt_os_timer_t timer)
308 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
309 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
310 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
311 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
312 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
313 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
314 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
315 mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
316 thread_basic_info_data_t thi_data;
317 thread_basic_info_t thi = &thi_data;
318 thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
319 timer->start.tv_usec = thi->system_time.microseconds + thi->user_time.microseconds;
320 timer->start.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
321 #elif HAVE_GETTIMEOFDAY
322 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
323 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
324 gettimeofday(&(timer->start), NULL);
325 #elif defined(_WIN32)
326 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
327 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
328 HANDLE h = GetCurrentThread();
329 FILETIME creationTime, exitTime, kernelTime, userTime;
330 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
331 w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
333 # error The thread timers of SimGrid do not seem to work on your platform.
337 void xbt_os_threadtimer_stop(xbt_os_timer_t timer)
339 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
340 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->stop));
341 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
342 mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
343 thread_basic_info_data_t thi_data;
344 thread_basic_info_t thi = &thi_data;
345 thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
346 timer->stop.tv_usec = thi->system_time.microseconds + thi->user_time.microseconds;
347 timer->stop.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
348 #elif HAVE_GETTIMEOFDAY //if nothing else is available, return just time
349 gettimeofday(&(timer->stop), NULL);
350 #elif defined(_WIN32)
351 HANDLE h = GetCurrentThread();
352 FILETIME creationTime, exitTime, kernelTime, userTime;
353 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
354 w32_times_to_timeval(&timer->stop, &kernelTime, &userTime);
356 # error The thread timers of SimGrid do not seem to work on your platform.