Merge branch 'master' of scm.gforge.inria.fr:/gitroot/simgrid/simgrid

[simgrid.git] / src / xbt / mmalloc / mrealloc.c

diff --git a/src/xbt/mmalloc/mrealloc.c b/src/xbt/mmalloc/mrealloc.c
index 5928d13..0e03a92 100644 (file)
--- a/src/xbt/mmalloc/mrealloc.c
+++ b/src/xbt/mmalloc/mrealloc.c
@@ -28,7 +28,9 @@ void *mrealloc(xbt_mheap_t mdp, void *ptr, size_t size)
 
   /* Only keep real realloc and hidden malloc and free to the relevant functions */
   if (size == 0) {
+       fprintf(stderr,"free from realloc...");
     mfree(mdp, ptr);
+    fprintf(stderr,"done\n");
     return mmalloc(mdp, 0);
   } else if (ptr == NULL) {
     return mmalloc(mdp, size);
@@ -53,10 +55,11 @@ void *mrealloc(xbt_mheap_t mdp, void *ptr, size_t size)
   switch (type) {
   case 0:
     /* Maybe reallocate a large block to a small fragment.  */
-    if (size <= BLOCKSIZE / 2) {
-      //printf("(%s) alloc large block...",xbt_thread_self_name());
+
+    if (size <= BLOCKSIZE / 2) { // Full block -> Fragment; no need to optimize for time
+
       result = mmalloc(mdp, size);
-      if (result != NULL) {
+      if (result != NULL) { // useless (mmalloc never returns NULL), but harmless
         memcpy(result, ptr, size);
         mfree(mdp, ptr);
         return (result);
@@ -67,13 +70,16 @@ void *mrealloc(xbt_mheap_t mdp, void *ptr, size_t size)
        see if we can hold it in place. */
     blocks = BLOCKIFY(size);
     if (blocks < mdp->heapinfo[block].busy_block.size) {
+       int it;
       /* The new size is smaller; return excess memory to the free list. */
       //printf("(%s) return excess memory...",xbt_thread_self_name());
-      mdp->heapinfo[block + blocks].type = 0;
+     for (it= block+blocks; it< mdp->heapinfo[block].busy_block.size ; it++)
+        mdp->heapinfo[it].type = 0;
       mdp->heapinfo[block + blocks].busy_block.size
           = mdp->heapinfo[block].busy_block.size - blocks;
       mdp->heapinfo[block].busy_block.size = blocks;
       mdp->heapinfo[block].busy_block.busy_size = size;
+
       mfree(mdp, ADDRESS(block + blocks));
       result = ptr;
     } else if (blocks == mdp->heapinfo[block].busy_block.size) {