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Autobuild-User: Volker Lendecke <vl@samba.org> Autobuild-Date: Tue May 15 18:24:10 CEST 2012 on sn-devel-104
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 2001-2007
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Copyright (C) Simo Sorce 2001
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Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
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Copyright (C) James Peach 2006
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#if defined(PARANOID_MALLOC_CHECKER)
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/****************************************************************************
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Internal malloc wrapper. Externally visible.
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****************************************************************************/
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void *malloc_(size_t size)
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{
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if (size == 0) {
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return NULL;
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}
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#undef malloc
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return malloc(size);
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#define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
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}
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/****************************************************************************
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Internal realloc wrapper. Not externally visible.
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****************************************************************************/
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static void *realloc_(void *ptr, size_t size)
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{
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#undef realloc
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return realloc(ptr, size);
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#define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
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}
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#endif /* PARANOID_MALLOC_CHECKER */
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/****************************************************************************
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Expand a pointer to be a particular size.
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Note that this version of Realloc has an extra parameter that decides
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whether to free the passed in storage on allocation failure or if the
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new size is zero.
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This is designed for use in the typical idiom of :
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p = SMB_REALLOC(p, size)
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if (!p) {
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return error;
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}
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and not to have to keep track of the old 'p' contents to free later, nor
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to worry if the size parameter was zero. In the case where NULL is returned
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we guarentee that p has been freed.
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If free later semantics are desired, then pass 'free_old_on_error' as False which
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guarentees that the old contents are not freed on error, even if size == 0. To use
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this idiom use :
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tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
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if (!tmp) {
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SAFE_FREE(p);
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return error;
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} else {
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p = tmp;
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}
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Changes were instigated by Coverity error checking. JRA.
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****************************************************************************/
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void *Realloc(void *p, size_t size, bool free_old_on_error)
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{
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void *ret=NULL;
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if (size == 0) {
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if (free_old_on_error) {
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SAFE_FREE(p);
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}
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DEBUG(2,("Realloc asked for 0 bytes\n"));
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return NULL;
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}
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#if defined(PARANOID_MALLOC_CHECKER)
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if (!p) {
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ret = (void *)malloc_(size);
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} else {
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ret = (void *)realloc_(p,size);
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}
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#else
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if (!p) {
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ret = (void *)malloc(size);
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} else {
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ret = (void *)realloc(p,size);
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}
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#endif
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if (!ret) {
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if (free_old_on_error && p) {
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SAFE_FREE(p);
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}
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DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
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}
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return(ret);
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}
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