added a magic value to check clobbering of the free list

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2103 a95241bf-73f2-0310-859d-f6bbb57e9c96
2002-11-28 14:10:20 +00:00
parent 60d9ed9e3b
commit 3b70f94330
2 changed files with 20 additions and 12 deletions
@@ -1,4 +1,4 @@
-/* pools.h
+	/* pools.h
 * simple fixed size block allocator
 */

@@ -21,8 +21,12 @@ struct pool_mem {
 	benaphore        lock;
 };

+#define FREE_MAGIC 'BORK'
+
 struct free_blk {
-	char *next;
+	uint32 magic;
+	struct free_blk *next;
+	uint32 magic_check;
 };

 #define POOL_USES_BENAPHORES 0
@@ -30,7 +34,7 @@ struct free_blk {

 struct pool_ctl {
 	struct pool_mem *list;
-	char            *freelist;
+	struct free_blk *freelist;
 	size_t           alloc_size;
 	size_t           block_size;
 #if POOL_USES_BENAPHORES