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.\" Copyright (c) 1980, 1991 Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)alloca.3 5.1 (Berkeley) 5/2/91
.\"
.\" Converted Mon Nov 29 11:05:55 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Tue Oct 22 23:41:56 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 2002-07-17, aeb
.\"
.\" Japanese Version Copyright (c) 1996 Kentaro OGAWA
.\" all rights reserved.
.\" Translated Sat, 13 Jul 1996 22:44:04 +0900
.\" by Kentaro OGAWA <k_ogawa@oyna.cc.muroran-it.ac.jp>
.\" Updated & Modified Tue Oct 16 01:01:48 JST 2001
.\" by Yuichi SATO <ysato@mail.sbvl.muroran-it.ac.jp>
.\" Updated & Modified Sat Aug 31 04:42:49 JST 2002 by Yuichi SATO
.\"
.TH ALLOCA 3 2002-07-17 "GNU" "Linux Programmer's Manual"
.SH ̾
alloca \- դ
.SH
.B #include <alloca.h>
.sp
.BI "void *alloca(size_t " size );
.SH
.B alloca
ؿϡ
.I size
ХȤΰƽиΥåե졼˳դ롣
ΰŪΰϡ
.B alloca
ƤӽФؿƽи֤Ȥ˼ưŪ˲롣
.SH ֤
.B alloca
ؿϡդΰλϤޤؤݥ֤
դˤäƥåСեä
ץưƤʤ
.SH
32v, pwb, pwb.2, 3bsd, 4bsd
.B alloca
ؿо줷ڵ롣
BSD 4.3 ˤϡޥ˥奢ڡ롣
Linux ϡGNU ǤȤäƤ롣
δؿ POSIX SUSv3 ˤϤʤ
.SH GNU ǤˤĤƤ
̾
.B gcc
.B alloca
θƤӽФ饤ɤѴ롣
\-ansi ץޤ
\-fno\-builtin ץꤷϡ
ϹԤʤ
ǥեȤǤ glibc Ǥ
.I <stdlib.h>
.I <alloca.h>
롼ɤƤꡢˤϰʲιԤޤޤƤΤդ뤳ȡ
.RS
# define alloca(size) __builtin_alloca (size)
.RE
ȼ __builtin_alloca (size) ؿʷ̤ˤʤ롣
.LP
Υɤϥ饤ƤΤǡ
δؿΥɥ쥹ꡢ
¾Υ饤֥ưѹ뤳ȤϤǤʤ
.LP
̾盧Υ饤ɤϥåݥư
1 Ĥ̿ (instruction) 鹽Ƥꡢ
åСեåʤ
ä NULL 顼֤뤳ȤϤʤ
.SH Х
.B alloca
ؿϡȥѥ˰¸롣
¿ΥƥǤϼ˥ХΤǡ
δؿλѤϿ侩ʤ
.LP
¿ΥƥˤơؿΰΥꥹǤ
.B alloca
Ȥʤ
ϡ
.B alloca
ˤäͽ륹åΰ褬
ؿ˻Ȥ륹åΰ˸ƤޤǤ롣
.SH Ϣ
.BR brk (2),
.BR pagesize (2),
.BR calloc (3),
.BR malloc (3),
.BR realloc (3)
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