madvise man page on MirBSD

madvise man page on MirBSD

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MADVISE(2)		   BSD Programmer's Manual		    MADVISE(2)

NAME
     madvise - give advice about use of memory

SYNOPSIS
     #include <sys/types.h>
     #include <sys/mman.h>

     int
     madvise(void *addr, size_t len, int behav);

DESCRIPTION
     The madvise() system call allows a process that has knowledge of its
     memory behavior to describe it to the system. The possible behaviors are:

     MADV_NORMAL      No further special treatment needed.

     MADV_RANDOM      Expect random page access patterns.

     MADV_SEQUENTIAL  Expect sequential page references.

     MADV_WILLNEED    The pages will be referenced soon.

     MADV_DONTNEED    The pages will not be referenced soon.

     MADV_SPACEAVAIL  Ensure that resources are reserved.

     MADV_FREE	      The pages don't contain any useful data and can be recy-
		      cled.

RETURN VALUES
     Upon successful completion, a value of 0 is returned. Otherwise, a value
     of -1 is returned and errno is set to indicate the error.

SEE ALSO
     mincore(2), minherit(2), mprotect(2), msync(2), munmap(2)

HISTORY
     The madvise function first appeared in 4.4BSD.

MirOS BSD #10-current		 June 9, 1993				     1

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