}
/* Allocate memory from the heap. */
-
-void *mmalloc(xbt_mheap_t mdp, size_t size)
+void *mmalloc(xbt_mheap_t mdp, size_t size) {
+ void *res= mmalloc_no_memset(mdp,size);
+ memset(res,0,size);
+ return res;
+}
+/* Spliting mmalloc this way is mandated by a trick in mrealloc, that gives
+ back the memory of big blocks to the system before reallocating them: we don't
+ want to loose the beginning of the area when this happens */
+void *mmalloc_no_memset(xbt_mheap_t mdp, size_t size)
{
void *result;
size_t block, blocks, lastblocks, start;
mdp -> heapstats.chunks_free--;
mdp -> heapstats.bytes_free -= 1 << log;
- memset(result, 0, requested_size);
-
} else {
/* No free fragments of the desired size, so get a new block
and break it into fragments, returning the first. */
//printf("(%s) No free fragment...",xbt_thread_self_name());
result = mmalloc(mdp, BLOCKSIZE); // does not return NULL
- memset(result, 0, requested_size);
- /* Link all fragments but the first into the free list, and mark their requested size to 0. */
+ /* Link all fragments but the first into the free list, and mark their requested size to -1. */
block = BLOCK(result);
for (i = 1; i < (size_t) (BLOCKSIZE >> log); ++i) {
- mdp->heapinfo[block].busy_frag.frag_size[i] = 0;
+ mdp->heapinfo[block].busy_frag.frag_size[i] = -1;
next = (struct list *) ((char *) result + (i << log));
next->next = mdp->fraghead[log].next;
next->prev = &mdp->fraghead[log];
continue;
}
result = register_morecore(mdp, blocks * BLOCKSIZE);
- memset(result, 0, requested_size);
block = BLOCK(result);
- for (it=0;it<blocks;it++)
+ for (it=0;it<blocks;it++){
mdp->heapinfo[block+it].type = 0;
+ }
mdp->heapinfo[block].busy_block.size = blocks;
mdp->heapinfo[block].busy_block.busy_size = requested_size;
mdp->heapinfo[block].busy_block.bt_size=xbt_backtrace_no_malloc(mdp->heapinfo[block].busy_block.bt,XBT_BACKTRACE_SIZE);
= mdp->heapindex = mdp->heapinfo[block].free_block.next;
}
- for (it=0;it<blocks;it++)
+ for (it=0;it<blocks;it++){
mdp->heapinfo[block+it].type = 0;
+ }
mdp->heapinfo[block].busy_block.size = blocks;
mdp->heapinfo[block].busy_block.busy_size = requested_size;
//mdp->heapinfo[block].busy_block.bt_size = 0;
mdp -> heapstats.chunks_used++;
mdp -> heapstats.bytes_used += blocks * BLOCKSIZE;
mdp -> heapstats.bytes_free -= blocks * BLOCKSIZE;
+
}
//printf("(%s) Done mallocing. Result is %p\n",xbt_thread_self_name(),result);fflush(stdout);
return (result);