Added xbt_dynar_remove_n_at to remove an n-sized slice from a dynar

[simgrid.git] / include / xbt / dynar.h

diff --git a/include/xbt/dynar.h b/include/xbt/dynar.h
index fe16ad3..1e710f4 100644 (file)
--- a/include/xbt/dynar.h
+++ b/include/xbt/dynar.h
@@ -92,6 +92,9 @@ XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar,
                                      const int idx, const void *src);
 XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar,
                                      const int idx, void *const dst);
+XBT_PUBLIC(void) xbt_dynar_remove_n_at(xbt_dynar_t const dynar,
+                                     const unsigned int n, const int idx);
+
 
 XBT_PUBLIC(unsigned int) xbt_dynar_search(xbt_dynar_t const dynar, void *elem);
 XBT_PUBLIC(signed int) xbt_dynar_search_or_negative(xbt_dynar_t const dynar, void *const elem);
@@ -224,16 +227,13 @@ typedef struct xbt_dynar_s {
   unsigned long elmsize;
   void *data;
   void_f_pvoid_t free_f;
-  xbt_mutex_t mutex;
 } s_xbt_dynar_t;
 
 static XBT_INLINE void
 _xbt_dynar_cursor_first(const xbt_dynar_t dynar,
                         unsigned int *const cursor)
 {
-  /* don't test for dynar!=NULL. The segfault would tell us */
-  if (dynar->mutex)             /* ie _dynar_lock(dynar) but not public */
-    xbt_mutex_acquire(dynar->mutex);
+  /* iterating over a NULL dynar is a no-op (but we don't want to have uninitialized counters) */
 
   //XBT_DEBUG("Set cursor on %p to the first position", (void *) dynar);
   *cursor = 0;
@@ -243,11 +243,11 @@ static XBT_INLINE int
 _xbt_dynar_cursor_get(const xbt_dynar_t dynar,
                       unsigned int idx, void *const dst)
 {
+  if (!dynar) /* iterating over a NULL dynar is a no-op */
+    return FALSE;
 
   if (idx >= dynar->used) {
     //XBT_DEBUG("Cursor on %p already on last elem", (void *) dynar);
-    if (dynar->mutex)           /* unlock */
-      xbt_mutex_release(dynar->mutex);
     return FALSE;
   }
   //  XBT_DEBUG("Cash out cursor on %p at %u", (void *) dynar, *idx);
@@ -278,7 +278,6 @@ xbt_dynar_foreach (dyn,cpt,str) {
 \endcode
  */
 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
-       if(_dynar) \
        for (_xbt_dynar_cursor_first(_dynar,&(_cursor))      ; \
       _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
             (_cursor)++         )