#include <sys/mman.h> int
mincore (const void *addr size_t len char *vec);
DESCRIPTION
The
mincore ();
system call determines whether each of the pages in the region beginning at
Fa addr
and continuing for
Fa len
bytes is resident.
The status is returned in the
Fa vec
array, one character per page.
Each character is either 0 if the page is not resident, or a combination of
the following flags (defined in
In sys/mman.h ) :
MINCORE_INCORE
Page is in core (resident).
MINCORE_REFERENCED
Page has been referenced by us.
MINCORE_MODIFIED
Page has been modified by us.
MINCORE_REFERENCED_OTHER
Page has been referenced.
MINCORE_MODIFIED_OTHER
Page has been modified.
The information returned by
mincore ();
may be out of date by the time the system call returns.
The only way to ensure that a page is resident is to lock it into memory
with the
mlock(2)
system call.
RETURN VALUES
Rv -std mincore
ERRORS
The
mincore ();
system call will fail if:
Bq Er ENOMEM
The virtual address range specified by the
Fa addr
and
Fa len
arguments is not fully mapped.
