X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c9f0b6f33ed2290b8f99ca0d34646e6418dcd0ba..9eb8b5a3c4a65bf441c487ecef308654d4f384f4:/src/xbt/sysdep.c?ds=sidebyside

diff --git a/src/xbt/sysdep.c b/src/xbt/sysdep.c
index a3b0a8a040..6f6aea8b8a 100644
--- a/src/xbt/sysdep.c
+++ b/src/xbt/sysdep.c
@@ -1,6 +1,6 @@
 /* $Id$ */
 
-/* sysdep.h -- all system dependency                                        */
+/* 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                            */
 
@@ -10,15 +10,67 @@
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "xbt/sysdep.h"
+#include "xbt/xbt_portability.h" /* private */
 #include "xbt/log.h"
 #include "xbt/error.h"
+#include "portable.h"
+
+
+/* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus 
+   disabled in SDL source code */ 
 
-#include <stdlib.h>
 
 /* \defgroup XBT_sysdep All system dependency
  * \brief This section describes many macros/functions that can serve as
  *  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;
+#else
+   unsigned long int start,stop;
+#endif
+};
+
+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_start(xbt_os_timer_t timer) {
+#ifdef HAVE_GETTIMEOFDAY
+  gettimeofday(&(timer->start), NULL);
+#else 
+  timer->start = (unsigned long int)(time(NULL));
+#endif
+}
+void xbt_os_timer_stop(xbt_os_timer_t timer) {
+#ifdef HAVE_GETTIMEOFDAY
+  gettimeofday(&(timer->stop), NULL);
+#else 
+  timer->stop = (unsigned long int)(time(NULL));
+#endif
+}
+double xbt_os_timer_elapsed(xbt_os_timer_t timer) {
+   return  ((double)timer->stop.tv_sec)  - ((double)timer->start.tv_sec) +
+         ((((double)timer->stop.tv_usec) - ((double)timer->start.tv_usec)) / 1000000.0);
+}
+