+size_t xbt_os_timer_size(void)
+{
+ return sizeof(struct s_xbt_os_timer);
+}
+
+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);
+}
+
+double xbt_os_timer_elapsed(xbt_os_timer_t timer)
+{
+#if HAVE_POSIX_GETTIME
+ return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
+ ((((double) timer->stop.tv_nsec) - ((double) timer->start.tv_nsec) + ((double) timer->elapse.tv_nsec )) / 1e9);
+#elif HAVE_GETTIMEOFDAY || defined(_WIN32)
+ return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
+ ((((double) timer->stop.tv_usec) - ((double) timer->start.tv_usec) + ((double) timer->elapse.tv_usec )) /
+ 1000000.0);
+#else
+ return (double) timer->stop - (double) timer->start + (double) timer->elapse;
+#endif
+}
+
+void xbt_os_walltimer_start(xbt_os_timer_t timer)
+{
+#if HAVE_POSIX_GETTIME
+ timer->elapse.tv_sec = 0;
+ timer->elapse.tv_nsec = 0;
+ clock_gettime(CLOCK_REALTIME, &(timer->start));
+#elif HAVE_GETTIMEOFDAY
+ timer->elapse.tv_sec = 0;
+ timer->elapse.tv_usec = 0;
+ gettimeofday(&(timer->start), NULL);
+#elif defined(_WIN32)
+ timer->elapse.tv_sec = 0;
+ timer->elapse.tv_usec = 0;
+ FILETIME ft;
+ GetSystemTimeAsFileTime(&ft);
+ w32_time_to_timeval(&timer->start, &ft);
+#else
+ timer->elapse = 0;
+ timer->start = (unsigned long int) (time(NULL));
+#endif
+}
+
+void xbt_os_walltimer_resume(xbt_os_timer_t timer)
+{
+#if HAVE_POSIX_GETTIME
+ timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
+
+ timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
+ clock_gettime(CLOCK_REALTIME, &(timer->start));
+#elif HAVE_GETTIMEOFDAY
+ timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
+ timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
+ gettimeofday(&(timer->start), NULL);
+#elif defined(_WIN32)
+ timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
+ timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
+ FILETIME ft;
+ GetSystemTimeAsFileTime(&ft);
+ w32_time_to_timeval(&timer->start, &ft);
+#else
+ timer->elapse = timer->stop - timer->start;
+ timer->start = (unsigned long int) (time(NULL));
+#endif
+}
+
+void xbt_os_walltimer_stop(xbt_os_timer_t timer)
+{
+#if HAVE_POSIX_GETTIME
+ clock_gettime(CLOCK_REALTIME, &(timer->stop));
+#elif HAVE_GETTIMEOFDAY
+ gettimeofday(&(timer->stop), NULL);
+#elif defined(_WIN32)
+ FILETIME ft;
+ GetSystemTimeAsFileTime(&ft);
+ w32_time_to_timeval(&timer->stop, &ft);
+#else
+ timer->stop = (unsigned long int) (time(NULL));
+#endif