Mercurial > gnulib
view lib/xmalloca.h @ 17364:7524d97ae56f
stdalign: port to stricter ISO C11
ISO C11 says that _Alignof's operand must be a parenthesized type.
Problem reported by Eli Zaretskii in
<http://lists.gnu.org/archive/html/emacs-devel/2013-03/msg00960.html>.
* doc/posix-headers/stdalign.texi (stdalign.h): Document this.
* m4/stdalign.m4 (gl_STDALIGN_H): Don't use _Alignof (expr).
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Fri, 29 Mar 2013 19:47:13 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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/* Safe automatic memory allocation with out of memory checking. Copyright (C) 2003, 2005, 2007, 2009-2013 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2003. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _XMALLOCA_H #define _XMALLOCA_H #include "malloca.h" #include "xalloc.h" #ifdef __cplusplus extern "C" { #endif /* xmalloca(N) is a checking safe variant of alloca(N). It allocates N bytes of memory allocated on the stack, that must be freed using freea() before the function returns. Upon failure, it exits with an error message. */ #if HAVE_ALLOCA # define xmalloca(N) \ ((N) < 4032 - sa_increment \ ? (void *) ((char *) alloca ((N) + sa_increment) + sa_increment) \ : xmmalloca (N)) extern void * xmmalloca (size_t n); #else # define xmalloca(N) \ xmalloc (N) #endif /* xnmalloca(N,S) is an overflow-safe variant of xmalloca (N * S). It allocates an array of N objects, each with S bytes of memory, on the stack. S must be positive and N must be nonnegative. The array must be freed using freea() before the function returns. Upon failure, it exits with an error message. */ #if HAVE_ALLOCA /* Rely on xmalloca (SIZE_MAX) calling xalloc_die (). */ # define xnmalloca(n, s) \ xmalloca (xalloc_oversized ((n), (s)) ? (size_t) (-1) : (n) * (s)) #else # define xnmalloca(n, s) \ xnmalloc ((n), (s)) #endif #ifdef __cplusplus } #endif #endif /* _XMALLOCA_H */