1 /* xbt_os_time.c -- portable interface to time-related functions */
3 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/sysdep.h"
10 #include "xbt/xbt_os_time.h" /* this module */
13 #include <math.h> /* floor */
16 #include <sys/timeb.h>
20 //Freebsd doesn't provide this clock_gettime flag yet, because it was added too recently (after 1993)
22 #define CLOCK_PROCESS_CPUTTIME_ID CLOCK_PROF
25 double xbt_os_time(void)
27 #ifdef HAVE_GETTIMEOFDAY
29 gettimeofday(&tv, NULL);
30 #elif defined(_XBT_WIN32)
32 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
38 tv.tv_usec = tm.millitm * 1000;
44 GetSystemTimeAsFileTime(&ft);
45 tm = (unsigned __int64) ft.dwHighDateTime << 32;
46 tm |= ft.dwLowDateTime;
48 tm -= 11644473600000000ULL;
50 tv.tv_sec = (long) (tm / 1000000L);
51 tv.tv_usec = (long) (tm % 1000000L);
52 # endif /* windows version checker */
54 #else /* not windows, no gettimeofday => poor resolution */
55 return (double) (time(NULL));
56 #endif /* HAVE_GETTIMEOFDAY? */
58 return (double) (tv.tv_sec + tv.tv_usec / 1000000.0);
61 void xbt_os_sleep(double sec)
65 Sleep((floor(sec) * 1000) + ((sec - floor(sec)) * 1000));
70 ts.tv_nsec = (sec - floor(sec)) * 1e9;
71 nanosleep (&ts, NULL);
72 #else /* don't have nanosleep. Use select to sleep less than one second */
73 struct timeval timeout;
75 timeout.tv_sec = (unsigned long) (sec);
76 timeout.tv_usec = (sec - floor(sec)) * 1000000;
78 select(0, NULL, NULL, NULL, &timeout);
82 /* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus
83 disabled in SDL source code */
86 /* \defgroup XBT_sysdep All system dependency
87 * \brief This section describes many macros/functions that can serve as
92 struct s_xbt_os_timer {
93 #ifdef HAVE_POSIX_GETTIME
94 struct timespec start, stop, elapse;
95 #elif defined(HAVE_GETTIMEOFDAY)
96 struct timeval start, stop, elapse;
98 unsigned long int start, stop, elapse;
102 xbt_os_timer_t xbt_os_timer_new(void)
104 return xbt_new0(struct s_xbt_os_timer, 1);
107 void xbt_os_timer_free(xbt_os_timer_t timer)
112 double xbt_os_timer_elapsed(xbt_os_timer_t timer)
114 #ifdef HAVE_POSIX_GETTIME
115 return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) +
116 ((double) timer->elapse.tv_sec ) +
117 ((((double) timer->stop.tv_nsec) -
118 ((double) timer->start.tv_nsec) + ((double) timer->elapse.tv_nsec )) / 1e9);
119 #elif defined(HAVE_GETTIMEOFDAY) || defined(_XBT_WIN32)
120 return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec)
121 + ((double) timer->elapse.tv_sec ) +
122 ((((double) timer->stop.tv_usec) -
123 ((double) timer->start.tv_usec) + ((double) timer->elapse.tv_usec )) / 1000000.0);
125 return (double) timer->stop - (double) timer->start + (double)
130 void xbt_os_walltimer_start(xbt_os_timer_t timer)
132 #ifdef HAVE_POSIX_GETTIME
133 timer->elapse.tv_sec = 0;
134 timer->elapse.tv_nsec = 0;
135 clock_gettime(CLOCK_REALTIME, &(timer->start));
136 #elif defined(HAVE_GETTIMEOFDAY)
137 timer->elapse.tv_sec = 0;
138 timer->elapse.tv_usec = 0;
139 gettimeofday(&(timer->start), NULL);
140 #elif defined(_XBT_WIN32)
141 timer->elapse.tv_sec = 0;
142 timer->elapse.tv_usec = 0;
143 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
148 timer->start.tv_sec = tm.time;
149 timer->start.tv_usec = tm.millitm * 1000;
155 GetSystemTimeAsFileTime(&ft);
156 tm = (unsigned __int64) ft.dwHighDateTime << 32;
157 tm |= ft.dwLowDateTime;
159 tm -= 11644473600000000ULL;
161 timer->start.tv_sec = (long) (tm / 1000000L);
162 timer->start.tv_usec = (long) (tm % 1000000L);
163 # endif /* windows version checker */
166 timer->start = (unsigned long int) (time(NULL));
170 void xbt_os_walltimer_resume(xbt_os_timer_t timer)
172 #ifdef HAVE_POSIX_GETTIME
173 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
175 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
176 clock_gettime(CLOCK_REALTIME, &(timer->start));
177 #elif defined(HAVE_GETTIMEOFDAY)
178 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
179 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
180 gettimeofday(&(timer->start), NULL);
181 #elif defined(_XBT_WIN32)
182 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
183 timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
184 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
189 timer->start.tv_sec = tm.time;
190 timer->start.tv_usec = tm.millitm * 1000;
196 GetSystemTimeAsFileTime(&ft);
197 tm = (unsigned __int64) ft.dwHighDateTime << 32;
198 tm |= ft.dwLowDateTime;
200 tm -= 11644473600000000ULL;
202 timer->start.tv_sec = (long) (tm / 1000000L);
203 timer->start.tv_usec = (long) (tm % 1000000L);
206 timer->elapse = timer->stop - timer->start;
207 timer->start = (unsigned long int) (time(NULL));
211 void xbt_os_walltimer_stop(xbt_os_timer_t timer)
213 #ifdef HAVE_POSIX_GETTIME
214 clock_gettime(CLOCK_REALTIME, &(timer->stop));
215 #elif defined(HAVE_GETTIMEOFDAY)
216 gettimeofday(&(timer->stop), NULL);
217 #elif defined(_XBT_WIN32)
218 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
223 timer->stop.tv_sec = tm.time;
224 timer->stop.tv_usec = tm.millitm * 1000;
230 GetSystemTimeAsFileTime(&ft);
231 tm = (unsigned __int64) ft.dwHighDateTime << 32;
232 tm |= ft.dwLowDateTime;
234 tm -= 11644473600000000ULL;
236 timer->stop.tv_sec = (long) (tm / 1000000L);
237 timer->stop.tv_usec = (long) (tm % 1000000L);
240 timer->stop = (unsigned long int) (time(NULL));
244 void xbt_os_cputimer_start(xbt_os_timer_t timer)
246 #ifdef HAVE_POSIX_GETTIME
247 timer->elapse.tv_sec = 0;
248 timer->elapse.tv_nsec = 0;
249 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
250 #elif defined(_XBT_WIN32)
251 timer->elapse.tv_sec = 0;
252 timer->elapse.tv_nsec = 0;
253 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
256 HANDLE h = GetCurrentProcess();
257 FILETIME creationTime, exitTime, kernelTime, userTime;
258 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
259 unsigned __int64 ktm, utm;
260 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
261 ktm |= kernelTime.dwLowDateTime;
263 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
264 utm |= userTime.dwLowDateTime;
266 timer->start.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
267 timer->start.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
268 # endif /* windows version checker */
272 void xbt_os_cputimer_resume(xbt_os_timer_t timer)
274 #ifdef HAVE_POSIX_GETTIME
275 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
276 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
277 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
278 #elif defined(_XBT_WIN32)
279 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
280 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
281 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
284 HANDLE h = GetCurrentProcess();
285 FILETIME creationTime, exitTime, kernelTime, userTime;
286 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
287 unsigned __int64 ktm, utm;
288 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
289 ktm |= kernelTime.dwLowDateTime;
291 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
292 utm |= userTime.dwLowDateTime;
294 timer->start.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
295 timer->start.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
296 # endif /* windows version checker */
301 void xbt_os_cputimer_stop(xbt_os_timer_t timer)
303 #ifdef HAVE_POSIX_GETTIME
304 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->stop));
305 #elif defined(_XBT_WIN32)
306 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
309 HANDLE h = GetCurrentProcess();
310 FILETIME creationTime, exitTime, kernelTime, userTime;
311 GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
312 unsigned __int64 ktm, utm;
313 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
314 ktm |= kernelTime.dwLowDateTime;
316 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
317 utm |= userTime.dwLowDateTime;
319 timer->stop.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
320 timer->stop.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
321 # endif /* windows version checker */
325 void xbt_os_threadtimer_start(xbt_os_timer_t timer)
327 #ifdef HAVE_POSIX_GETTIME
328 timer->elapse.tv_sec = 0;
329 timer->elapse.tv_nsec = 0;
330 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
331 #elif defined(_XBT_WIN32)
333 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
336 HANDLE h = GetCurrentThread();
337 FILETIME creationTime, exitTime, kernelTime, userTime;
338 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
339 unsigned __int64 ktm, utm;
340 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
341 ktm |= kernelTime.dwLowDateTime;
343 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
344 utm |= userTime.dwLowDateTime;
346 timer->start.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
347 timer->start.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
348 # endif /* windows version checker */
352 void xbt_os_threadtimer_resume(xbt_os_timer_t timer)
354 #ifdef HAVE_POSIX_GETTIME
355 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
356 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
357 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
358 #elif defined(_XBT_WIN32)
359 timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
360 timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
361 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
364 HANDLE h = GetCurrentThread();
365 FILETIME creationTime, exitTime, kernelTime, userTime;
366 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
367 unsigned __int64 ktm, utm;
368 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
369 ktm |= kernelTime.dwLowDateTime;
371 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
372 utm |= userTime.dwLowDateTime;
374 timer->start.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
375 timer->start.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
376 # endif /* windows version checker */
380 void xbt_os_threadtimer_stop(xbt_os_timer_t timer)
382 #ifdef HAVE_POSIX_GETTIME
383 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->stop));
384 #elif defined(_XBT_WIN32)
385 # if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
388 HANDLE h = GetCurrentThread();
389 FILETIME creationTime, exitTime, kernelTime, userTime;
390 GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
391 unsigned __int64 ktm, utm;
392 ktm = (unsigned __int64) kernelTime.dwHighDateTime << 32;
393 ktm |= kernelTime.dwLowDateTime;
395 utm = (unsigned __int64) userTime.dwHighDateTime << 32;
396 utm |= userTime.dwLowDateTime;
398 timer->stop.tv_sec = (long) (ktm / 1000000L) + (long) (utm / 1000000L);
399 timer->stop.tv_usec = (long) (ktm % 1000000L) + (long) (utm % 1000000L);
400 # endif /* windows version checker */