GETPAGESIZES(3) |
FreeBSD Library Functions Manual |
GETPAGESIZES(3) |
NAME
getpagesizes —
get system page sizes
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include < sys/mman.h>
int
getpagesizes( size_t pagesize[], int nelem);
DESCRIPTION
The
getpagesizes() function retrieves page size information from the system. When it is called with
pagesize specified as
NULL and
nelem specified as 0, it returns the number of distinct page sizes that are supported by the system. Otherwise, it assigns up to
nelem of the system-supported page sizes to consecutive elements of the array referenced by
pagesize. These page sizes are expressed in bytes. In this case,
getpagesizes() returns the number of such page sizes that it assigned to the array.
RETURN VALUES
If successful, the
getpagesizes() function returns either the number of page sizes that are supported by the system or the number of supported page sizes that it assigned to the array referenced by
pagesize. Otherwise, it returns the value -1 and sets
errno to indicate the error.
ERRORS
The
getpagesizes() function will succeed unless:
-
[
EINVAL]
-
The
pagesize argument is
NULL and the
nelem argument is non-zero.
-
[
EINVAL]
-
The
nelem argument is less than zero.
HISTORY
The
getpagesizes() function first appeared in Solaris 9. This manual page was written in conjunction with a new but compatible implementation that was first released in
FreeBSD 7.3.
AUTHORS
This manual page was written by
Alan L. Cox <alc@cs.rice.edu>.