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 _bmsize()               Return Size of Based Heap Memory Block

 #include    <malloc.h>

 size_t _bmsize(seg, memblock);
 _segment seg;                          Based heap segment selector
 void _based(void) *memblock;           Allocate memory block

    This is the based heap version of _msize(); it returns the number
    of bytes in the based heap memory block memblock, which is itself
    in the segment indicated by seg. See _msize() for more information.

    Returns:    Size in bytes.

 Portability:   Not supported by the ANSI standard.