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44 lines
758 B
C
44 lines
758 B
C
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/*
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* _heap.h
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*
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* Ullrich von Bassewitz, 03.06.1998
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*
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*/
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#ifndef __HEAP_H
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#define __HEAP_H
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/* Space needed for administering used blocks */
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#define HEAP_ADMIN_SPACE sizeof (unsigned)
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/* The data type used to implement the free list.
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* Beware: Field order is significant!
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*/
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struct freeblock {
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unsigned size;
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struct freeblock* next;
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struct freeblock* prev;
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};
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/* Variables that describe the heap */
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extern unsigned* _horg; /* Bottom of heap */
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extern unsigned* _hptr; /* Current top */
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extern unsigned* _hend; /* Upper limit */
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extern struct freeblock* _hfirst; /* First free block in list */
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extern struct freeblock* _hlast; /* Last free block in list */
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/* End of _heap.h */
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#endif
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