80 lines
2.7 KiB
Groff
80 lines
2.7 KiB
Groff
.\" $NetBSD: valloc.3,v 1.6 1998/04/28 04:07:06 fair Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)valloc.3 8.1 (Berkeley) 6/4/93
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.\"
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.Dd June 4, 1993
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.Dt VALLOC 3
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.Os BSD 3
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.Sh NAME
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.Nm valloc
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.Nd aligned memory allocation function
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.Fd #include <unistd.h>
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.Ft void *
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.Fn valloc "size_t size"
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.Sh DESCRIPTION
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.Bf -symbolic
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Valloc is obsoleted by the current version of
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.Xr malloc 3 ,
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which aligns page-sized and larger allocations.
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.Ef
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.Pp
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The
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.Fn valloc
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function
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allocates
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.Fa size
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bytes aligned on a page boundary.
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It is implemented by calling
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.Xr malloc 3
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with a slightly larger request, saving the true beginning of the block
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allocated, and returning a properly aligned pointer.
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.Sh RETURN VALUES
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The
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.Fn valloc
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function returns
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a pointer to the allocated space if successful; otherwise
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a null pointer is returned
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.Sh HISTORY
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The
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.Fn valloc
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function appeared in
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.Bx 3.0 .
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.Sh BUGS
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A
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.Em vfree
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function has not been implemented.
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