4 * Ullrich von Bassewitz, 03.06.1998
15 /* Space needed for administering used blocks */
16 #define HEAP_ADMIN_SPACE sizeof (unsigned)
18 /* The data type used to implement the free list.
19 * Beware: Field order is significant!
23 struct freeblock* next;
24 struct freeblock* prev;
29 /* Variables that describe the heap */
30 extern unsigned* _horg; /* Bottom of heap */
31 extern unsigned* _hptr; /* Current top */
32 extern unsigned* _hend; /* Upper limit */
33 extern struct freeblock* _hfirst; /* First free block in list */
34 extern struct freeblock* _hlast; /* Last free block in list */