#define POOL_CLEAR (1<<0) /* zero fill allocations */
#define POOL_QALIGN (1<<1) /* align data to quanta */
#define POOL_INTERN (1<<2) /* Allocate extent structures */
-#define POOL_APPEND (1<<3) /* or appended to extent data */
+#define POOL_PREPEND (1<<3) /* or prepend to extent data */
typedef void *alloc_pool_t;