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.\" $OpenBSD: valloc.3,v 1.14 2013/06/05 03:39:22 tedu Exp $
.\"
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.Dd $Mdocdate: June 5 2013 $
.Dt VALLOC 3
.Os
.Sh NAME
.Nm valloc
.Nd aligned memory allocation function
.Sh SYNOPSIS
.In unistd.h
.Ft void *
.Fn valloc "size_t size"
.Sh DESCRIPTION
.Bf -symbolic
The
.Fn valloc
function is obsoleted by the current version of
.Xr malloc 3 ,
which aligns page-sized and larger allocations,
and
.Xr posix_memalign 3 ,
which allocates memory with a given alignment.
.Ef
.Pp
The
.Fn valloc
function allocates
.Fa size
bytes aligned on a page boundary.
It is implemented by calling
.Xr malloc 3
with a slightly larger request, saving the true beginning of the block
allocated, and returning a properly aligned pointer.
.Sh RETURN VALUES
The
.Fn valloc
function returns
a pointer to the allocated space if successful; otherwise a
null pointer is returned.
.Sh SEE ALSO
.Xr malloc 3
.Sh HISTORY
The
.Fn valloc
function appeared in
.Bx 3.0 .
.Sh BUGS
A
.Fn vfree
function has not been implemented.
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