man/man3c/getpagesizes.3c

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 getpagesizes 3C "14 May 2001" "SunOS 5.11" "Standard C Library Functions"
 NAME
getpagesizes - get system supported page sizes
 SYNOPSIS

#include <sys/mman.h>

int getpagesizes(size_t pagesize[\|], int nelem);


 DESCRIPTION

The getpagesizes() function returns either the number of different page
sizes supported by the system or the actual sizes themselves. When called with
nelem as 0 and pagesize as NULL, getpagesizes() returns the
number of supported page sizes. Otherwise, up to nelem page sizes are
retrieved and assigned to successive elements of pagesize[\|]. The
return value is the number of page sizes retrieved and set in
pagesize[\|].
 RETURN VALUES

Upon successful completion, the number of pagesizes supported or actually
retrieved is returned. Otherwise, -1 is returned and errno is set to
indicate the error.
 ERRORS

The getpagesizes() function will fail if:

EINVAL

The nelem argument is less than 0 or pagesize is NULL but
nelem is non-zero.


 USAGE

The getpagesizes() function returns all the page sizes for which the
hardware and system software provide support for the memcntl(2) command
MC_HAT_ADVISE. Not all processors support all page sizes or combinations
of page sizes with equal efficiency. Applications programmers should take this
into consideration when using getpagesizes().
 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:


ATTRIBUTE TYPEATTRIBUTE VALUE
MT-LevelMT-Safe


 SEE ALSO

memcntl(2), mmap(2), getpagesize(3C), attributes(5)