1.\" $OpenBSD: valloc.3,v 1.12 2007/05/31 19:19:29 jmc Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd $Mdocdate: May 31 2007 $ 31.Dt VALLOC 3 32.Os 33.Sh NAME 34.Nm valloc 35.Nd aligned memory allocation function 36.Sh SYNOPSIS 37.Fd #include <unistd.h> 38.Ft void * 39.Fn valloc "size_t size" 40.Sh DESCRIPTION 41.Bf -symbolic 42The 43.Fn valloc 44function is obsoleted by the current version of 45.Xr malloc 3 , 46which aligns page-sized and larger allocations. 47.Ef 48.Pp 49The 50.Fn valloc 51function allocates 52.Fa size 53bytes aligned on a page boundary. 54It is implemented by calling 55.Xr malloc 3 56with a slightly larger request, saving the true beginning of the block 57allocated, and returning a properly aligned pointer. 58.Sh RETURN VALUES 59The 60.Fn valloc 61function returns 62a pointer to the allocated space if successful; otherwise a 63null pointer is returned. 64.Sh SEE ALSO 65.Xr malloc 3 66.Sh HISTORY 67The 68.Fn valloc 69function appeared in 70.Bx 3.0 . 71.Sh BUGS 72A 73.Fn vfree 74function has not been implemented. 75