1.\" $OpenBSD: valloc.3,v 1.9 2000/12/24 00:30:53 aaron 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. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.Dd June 4, 1993 35.Dt VALLOC 3 36.Os 37.Sh NAME 38.Nm valloc 39.Nd aligned memory allocation function 40.Sh SYNOPSIS 41.Fd #include <unistd.h> 42.Ft void * 43.Fn valloc "size_t size" 44.Sh DESCRIPTION 45.Bf -symbolic 46The 47.Fn valloc 48function is obsoleted by the current version of 49.Xr malloc 3 , 50which aligns page-sized and larger allocations. 51.Ef 52.Pp 53The 54.Fn valloc 55function allocates 56.Fa size 57bytes aligned on a page boundary. 58It is implemented by calling 59.Xr malloc 3 60with a slightly larger request, saving the true beginning of the block 61allocated, and returning a properly aligned pointer. 62.Sh RETURN VALUES 63The 64.Fn valloc 65function returns 66a pointer to the allocated space if successful; otherwise a 67null pointer is returned. 68.Sh HISTORY 69The 70.Fn valloc 71function appeared in 72.Bx 3.0 . 73.Sh BUGS 74A 75.Fn vfree 76function has not been implemented. 77