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MEXPORT_HEAP void init_heap(unsigned heapsize);
MEXPORT_HEAP void *mallocate(unsigned long nbytes);
MEXPORT_HEAP void *callocate(unsigned long, unsigned);
MEXPORT_HEAP void *reallocate(void *, unsigned);
MEXPORT_HEAP void free2(void *address);
MEXPORT_HEAP void reset_heap(void *addr);
MEXPORT_HEAP void *heapmax(void);
MEXPORT_HEAP unsigned long mycoreleft(void);
MEXPORT_HEAP void nospace(void);
#define UNITSHIFT  4         /* sizeof(unit) should be 1 << UNITSHIFT      */
typedef unsigned short unit[ 1 << (UNITSHIFT-1)];