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.TH GETPAGESIZE 3C "Jun 27, 2000"
.SH NAME
getpagesize \- get system page size
.SH SYNOPSIS
.LP
.nf
#include <unistd.h>

\fBint\fR \fBgetpagesize\fR(\fBvoid\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBgetpagesize()\fR function returns the number of bytes in a page. Page
granularity is the granularity of many of the memory management calls.
.sp
.LP
The page size is a system page size and need not be the same as the underlying
hardware page size.
.sp
.LP
The \fBgetpagesize()\fR function is equivalent to \fBsysconf(_SC_PAGE_SIZE)\fR
and \fBsysconf(_SC_PAGESIZE)\fR. See \fBsysconf\fR(3C).
.SH RETURN VALUES
.sp
.LP
The \fBgetpagesize()\fR function returns the current page size.
.SH ERRORS
.sp
.LP
No errors are defined.
.SH USAGE
.sp
.LP
The value returned by \fBgetpagesize()\fR need not be the minimum value that
\fBmalloc\fR(3C) can allocate.  Moreover, the application cannot assume that an
object of this size can be allocated with \fBmalloc()\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBpagesize\fR(1), \fBbrk\fR(2), \fBgetrlimit\fR(2), \fBmmap\fR(2),
\fBmprotect\fR(2), \fBmunmap\fR(2), \fBmalloc\fR(3C), \fBmsync\fR(3C),
\fBsysconf\fR(3C), \fBattributes\fR(5)