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_ffree()                 Deallocate Far Memory Block

 #include<malloc.h>                      Required for declarations only

 void       _ffree(ptr);
 char far   *ptr;                        Pointer to allocated far memory

    _ffree()  deallocates a memory block allocated by _fmalloc() and
    pointed to by 'ptr'.  (_fmalloc() allocates far memory blocks.)  This
    makes the memory in the block available for reallocation.

    Returns:    There is no return value.

      Notes:    The same number of bytes that were allocated by the call
                to _fmalloc() are deallocated by ffree().

                Use free() to free memory allocated by malloc() or
                calloc().

                Use hfree() to free memory allocated by halloc().

                Use _nfree() to free memory allocated by _nmalloc().

  -------------------------------- Example ---------------------------------

    The following statements allocate space for 1000 bytes outside the
    default data segment, then free the allocated space.

           #include <malloc.h>
           #include <stdio.h>      /* for printf and NULL */

           char far *far_memptr;

           main()
           {
               if ((far_memptr = _fmalloc(1000)) == NULL)
                    printf("not enough room to allocate memory\n");
               else {
                    . . .                 /* Use the memory... */
                    .
                    _ffree(far_memptr);   /* ...then free the memory */
               }
           }