From 48fb61a024cd614fd1544b95c360022fc470b505 Mon Sep 17 00:00:00 2001
From: alegrand <alegrand@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Thu, 31 Mar 2005 01:21:58 +0000
Subject: [PATCH] Add xbt_os_time(). This functions returns the number of
 seconds since the Epoch (00:00:00 UTC, January 1, 1970).  Most users should
 use gras_os_time and should not use this function unless they really know
 what they are doing.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@1200 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 include/xbt/sysdep.h |  7 +++++++
 src/xbt/sysdep.c     | 19 ++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/include/xbt/sysdep.h b/include/xbt/sysdep.h
index b405a7afd2..4bd3cea284 100644
--- a/include/xbt/sysdep.h
+++ b/include/xbt/sysdep.h
@@ -91,6 +91,13 @@ static inline void *xbt_realloc(void*p,int s){
 
 /** @} */  
 
+/** @brief get time in seconds 
+
+  * gives  the  number  of  seconds since the Epoch (00:00:00 UTC, January 1, 1970).
+  * Most users should use gras_os_time and should not use this function unless 
+    they really know what they are doing. */
+double xbt_os_time(void);
+
 END_DECL()
 
 #endif /* _XBT_SYSDEP_H */
diff --git a/src/xbt/sysdep.c b/src/xbt/sysdep.c
index a3b0a8a040..428d006728 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                            */
 
@@ -12,13 +12,26 @@
 #include "xbt/sysdep.h"
 #include "xbt/log.h"
 #include "xbt/error.h"
-
-#include <stdlib.h>
+#include "portable.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");
 
-- 
2.20.1