/* $Id$ */
-/* 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 */
+/* xbt_os_time.c -- portable interface to time-related functions */
-/* Copyright (c) 2004 Martin Quinson. All rights reserved. */
+/* Copyright (c) 2004-2008 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 */
-/** @brief like free
- @hideinitializer */
-XBT_PUBLIC(void) xbt_free_f(void* p)
+#ifdef WIN32
+#include <sys/timeb.h>
+#endif
+
+double xbt_os_time(void)
{
- free(p);
-}
+#ifdef HAVE_GETTIMEOFDAY
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+#elif defined(WIN32)
+ struct timeval tv;
+# if defined(WIN32_WCE) || (_WIN32_WINNT < 0x0400)
+ struct _timeb tm;
+ _ftime(&tm);
-/* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus
- disabled in SDL source code */
+ tv.tv_sec = tm.time;
+ tv.tv_usec = tm.millitm * 1000;
+# else
+ FILETIME ft;
+ unsigned __int64 tm;
-/* \defgroup XBT_sysdep All system dependency
- * \brief This section describes many macros/functions that can serve as
- * an OS abstraction.
- */
+ GetSystemTimeAsFileTime(&ft);
+ tm = (unsigned __int64) ft.dwHighDateTime << 32;
+ tm |= ft.dwLowDateTime;
+ tm /= 10;
+ tm -= 11644473600000000ULL;
-double xbt_os_time(void) {
-#ifdef HAVE_GETTIMEOFDAY
- struct timeval tv;
+ tv.tv_sec = (long) (tm / 1000000L);
+ tv.tv_usec = (long) (tm % 1000000L);
+# endif /* windows version checker */
- gettimeofday(&tv, NULL);
+#else /* not windows, no gettimeofday => poor resolution */
+ return (double) (time(NULL));
+#endif /* HAVE_GETTIMEOFDAY? */
- return (double)(tv.tv_sec + tv.tv_usec / 1000000.0);
-#else
- /* Poor resolution */
- return (double)(time(NULL));
-#endif /* HAVE_GETTIMEOFDAY? */
+ return (double) (tv.tv_sec + tv.tv_usec / 1000000.0);
}
-/*XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sysdep, xbt, "System dependency");*/
+void xbt_os_sleep(double sec)
+{
+#ifdef HAVE_USLEEP
+ sleep(sec);
+ (void) usleep((sec - floor(sec)) * 1000000);
+
+#elif WIN32
+ Sleep((floor(sec) * 1000) + ((sec - floor(sec)) * 1000));
+
+#else /* don't have usleep. Use select to sleep less than one second */
+ struct timeval timeout;
+
+
+ timeout.tv_sec = (unsigned long) (sec);
+ timeout.tv_usec = (sec - floor(sec)) * 1000000;
+
+ select(0, NULL, NULL, NULL, &timeout);
+#endif
+}
+
+/* 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
+ * \brief This section describes many macros/functions that can serve as
+ * an OS abstraction.
+ */
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);
+ return xbt_new0(struct s_xbt_os_timer, 1);
}
+
void xbt_os_timer_free(xbt_os_timer_t timer) {
- free (timer);
+ free(timer);
}
+
void xbt_os_timer_start(xbt_os_timer_t timer) {
-#ifdef HAVE_GETTIMEOFDAY
+#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
+#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)) / 1e-9);
+#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
}
-
