X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/24b8008bb424160e633b1374f54dcd89bdcb9749..509afa8dafbfc8a505586e5447a1ed4c76cf0ae3:/src/xbt/fifo.c

diff --git a/src/xbt/fifo.c b/src/xbt/fifo.c
index cb50c60391..d83903296b 100644
--- a/src/xbt/fifo.c
+++ b/src/xbt/fifo.c
@@ -1,7 +1,9 @@
-/* Authors: Arnaud Legrand                                                  */
+/* 	$Id$	 */
+
+/* Copyright (c) 2004 Arnaud Legrand. 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. */
+ * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "xbt/sysdep.h"
 #include "xbt/error.h"
@@ -56,8 +58,8 @@ void *xbt_fifo_pop(xbt_fifo_t l)
   xbt_fifo_item_t item;
   void *content;
 
-  item = xbt_fifo_pop_item(l);
-  if(item==NULL) return NULL;
+  if(l==NULL) return NULL;
+  if(!(item = xbt_fifo_pop_item(l))) return NULL;
 
   content = item->content;
   xbt_fifo_freeitem(item);
@@ -87,9 +89,9 @@ void *xbt_fifo_shift(xbt_fifo_t l)
   xbt_fifo_item_t item;
   void *content;
 
-  item = xbt_fifo_shift_item(l);
   if(l==NULL) return NULL;
-
+  if(!(item = xbt_fifo_shift_item(l))) return NULL;
+  
   content = item->content;
   xbt_fifo_freeitem(item);
   return content;
@@ -306,4 +308,21 @@ int xbt_fifo_size(xbt_fifo_t f)
   return f->count;
 }
 
+xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l)
+{
+  return l->head;
+}
+
+xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i)
+{
+  if(i) return i->next;
+  return NULL;
+}
+
+xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i)
+{
+  if(i) return i->prev;
+  return NULL;
+}
+