int
mincore(
void *addr
, size_t len
, char *vec
)
)
system call
allows a process to obtain information about whether pages are
core resident.
The status of the memory range is returned in the character-per-page array
vec.
If the page is resident, the least significant bit of the corresponding
character in
vec
will be set.
Other bits are reserved for additional information
which future implementations may return.
Note that the status of each page may change between the call to
mincore()
and the return of the page status information.
In order to guarantee
that pages will remain in core, the address range must be locked with
mlock(2).
)
returns 0 on success, or -1 on failure and sets the variable
errno
to indicate the error.
)
call will fail if:
EFAULT
]
EINVAL
]
EINVAL
]
ENOMEM
]
)
function first appeared in
4.4BSD.