-/* $Id$ */
+/* xbt_os_time.c -- portable interface to time-related functions */
-/* sysdep.c -- all system dependency */
-/* no system header should be loaded out of this file so that we have only */
-/* one file to check when porting to another OS */
-
-/* Copyright (c) 2004-2007 The SimGrid team. All rights reserved. */
+/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "xbt/sysdep.h"
-#include "xbt/xbt_os_time.h" /* this module */
+#include "xbt/xbt_os_time.h" /* this module */
#include "xbt/log.h"
#include "portable.h"
-#include <math.h> /* floor */
-
+#include <math.h> /* floor */
-#ifdef WIN32
-#include <sys\timeb.h>
+#ifdef _XBT_WIN32
+#include <sys/timeb.h>
+#include <windows.h>
#endif
-double xbt_os_time(void) {
+double xbt_os_time(void)
+{
#ifdef HAVE_GETTIMEOFDAY
struct timeval tv;
-
gettimeofday(&tv, NULL);
+#elif defined(_XBT_WIN32)
+ struct timeval tv;
+# if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
+ struct _timeb tm;
- return (double)(tv.tv_sec + tv.tv_usec / 1000000.0);
-#elif defined(WIN32)
+ _ftime(&tm);
+
+ tv.tv_sec = tm.time;
+ tv.tv_usec = tm.millitm * 1000;
-# if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
- struct _timeb tm;
-
- _ftime (&tm);
-
- tv->tv_sec = tm.time;
- tv->tv_usec = tm.millitm * 1000;
-
# else
- FILETIME ft;
- unsigned __int64 tm;
-
- GetSystemTimeAsFileTime (&ft);
- tm = (unsigned __int64)ft.dwHighDateTime << 32;
- tm |= ft.dwLowDateTime;
- tm /=10;
- tm -= 11644473600000000ULL;
-
- tv->tv_sec = (long) (tm / 1000000L);
- tv->tv_usec = (long) (tm % 1000000L);
-#endif /* windows version checker */
-
-
-#else /* not windows, no gettimeofday => poor resolution */
-
- return (double)(time(NULL));
-#endif /* HAVE_GETTIMEOFDAY? */
-}
+ FILETIME ft;
+ unsigned __int64 tm;
+
+ GetSystemTimeAsFileTime(&ft);
+ tm = (unsigned __int64) ft.dwHighDateTime << 32;
+ tm |= ft.dwLowDateTime;
+ tm /= 10;
+ tm -= 11644473600000000ULL;
+
+ tv.tv_sec = (long) (tm / 1000000L);
+ tv.tv_usec = (long) (tm % 1000000L);
+# endif /* windows version checker */
-void xbt_os_sleep(double sec) {
-#ifdef HAVE_USLEEP
- sleep(sec);
- (void)usleep( (sec - floor(sec)) * 1000000);
+#else /* not windows, no gettimeofday => poor resolution */
+ return (double) (time(NULL));
+#endif /* HAVE_GETTIMEOFDAY? */
-#elif _WIN32
+ return (double) (tv.tv_sec + tv.tv_usec / 1000000.0);
+}
+
+void xbt_os_sleep(double sec)
+{
- Sleep((floor(sec) * 1000) +((sec - floor(sec)) * 1000));
+#ifdef _XBT_WIN32
+ Sleep((floor(sec) * 1000) + ((sec - floor(sec)) * 1000));
-
-#else /* don't have usleep. Use select to sleep less than one second */
+#elif HAVE_NANOSLEEP
+ struct timespec ts;
+ ts.tv_sec = sec;
+ ts.tv_nsec = (sec - floor(sec)) * 1e9;
+ nanosleep (&ts, NULL);
+#else /* don't have nanosleep. Use select to sleep less than one second */
struct timeval timeout;
-
- timeout.tv_sec = (unsigned long)(sec);
+ timeout.tv_sec = (unsigned long) (sec);
timeout.tv_usec = (sec - floor(sec)) * 1000000;
-
+
select(0, NULL, NULL, NULL, &timeout);
#endif
}
-/** @brief like free
- @hideinitializer */
-XBT_PUBLIC(void) xbt_free_f(void* p)
-{
- free(p);
-}
-
-
-/* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus
- disabled in SDL source code */
+/* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus
+ disabled in SDL source code */
/* \defgroup XBT_sysdep All system dependency
* an OS abstraction.
*/
-/*
-double xbt_os_time(void) {
-#ifdef HAVE_GETTIMEOFDAY
- struct timeval tv;
-
- gettimeofday(&tv, NULL);
-
- return (double)(tv.tv_sec + tv.tv_usec / 1000000.0);
-#else*/
- /* Poor resolution */
-/* return (double)(time(NULL));*/
-//#endif /* HAVE_GETTIMEOFDAY? */
-//}
-
-/*XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sysdep, xbt, "System dependency");*/
-
struct s_xbt_os_timer {
-#ifdef HAVE_GETTIMEOFDAY
- struct timeval start,stop;
+#ifdef HAVE_POSIX_GETTIME
+ struct timespec start, stop;
+#elif defined(HAVE_GETTIMEOFDAY)
+ struct timeval start, stop;
#else
- unsigned long int start,stop;
+ unsigned long int start, stop;
#endif
};
-xbt_os_timer_t xbt_os_timer_new(void) {
- return xbt_new0(struct s_xbt_os_timer,1);
+xbt_os_timer_t xbt_os_timer_new(void)
+{
+ return xbt_new0(struct s_xbt_os_timer, 1);
}
-void xbt_os_timer_free(xbt_os_timer_t timer) {
- free (timer);
+
+void xbt_os_timer_free(xbt_os_timer_t timer)
+{
+ free(timer);
}
-void xbt_os_timer_start(xbt_os_timer_t timer) {
-#ifdef HAVE_GETTIMEOFDAY
+
+void xbt_os_timer_start(xbt_os_timer_t timer)
+{
+#ifdef HAVE_POSIX_GETTIME
+ clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
+#elif defined(HAVE_GETTIMEOFDAY)
gettimeofday(&(timer->start), NULL);
-#else
- timer->start = (unsigned long int)(time(NULL));
+#else
+ timer->start = (unsigned long int) (time(NULL));
#endif
}
-void xbt_os_timer_stop(xbt_os_timer_t timer) {
-#ifdef HAVE_GETTIMEOFDAY
+
+void xbt_os_timer_stop(xbt_os_timer_t timer)
+{
+#ifdef HAVE_POSIX_GETTIME
+ clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->stop));
+#elif defined(HAVE_GETTIMEOFDAY)
gettimeofday(&(timer->stop), NULL);
-#else
- timer->stop = (unsigned long int)(time(NULL));
+#else
+ timer->stop = (unsigned long int) (time(NULL));
#endif
}
-double xbt_os_timer_elapsed(xbt_os_timer_t timer) {
-#ifdef HAVE_GETTIMEOFDAY
- return ((double)timer->stop.tv_sec) - ((double)timer->start.tv_sec) +
- ((((double)timer->stop.tv_usec) - ((double)timer->start.tv_usec)) / 1000000.0);
-#else
- return (double)timer->stop - (double)timer->start;
+
+double xbt_os_timer_elapsed(xbt_os_timer_t timer)
+{
+#ifdef HAVE_POSIX_GETTIME
+ return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) +
+ ((((double) timer->stop.tv_nsec) -
+ ((double) timer->start.tv_nsec)) / 1e9);
+#elif defined(HAVE_GETTIMEOFDAY)
+ return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) +
+ ((((double) timer->stop.tv_usec) -
+ ((double) timer->start.tv_usec)) / 1000000.0);
+#else
+ return (double) timer->stop - (double) timer->start;
#endif
}
-
