2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2007
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 /* Max allowable allococation - 256mb - 0x10000000 */
27 #define MAX_ALLOC_SIZE (1024*1024*256)
29 #if defined(PARANOID_MALLOC_CHECKER)
31 /****************************************************************************
32 Internal malloc wrapper. Externally visible.
33 ****************************************************************************/
35 void *malloc_(size_t size)
42 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
45 /****************************************************************************
46 Internal calloc wrapper. Not externally visible.
47 ****************************************************************************/
49 static void *calloc_(size_t count, size_t size)
51 if (size == 0 || count == 0) {
55 return calloc(count, size);
56 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
59 /****************************************************************************
60 Internal realloc wrapper. Not externally visible.
61 ****************************************************************************/
63 static void *realloc_(void *ptr, size_t size)
66 return realloc(ptr, size);
67 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
70 #endif /* PARANOID_MALLOC_CHECKER */
72 /****************************************************************************
73 Expand a pointer to be a particular size.
74 Note that this version of Realloc has an extra parameter that decides
75 whether to free the passed in storage on allocation failure or if the
78 This is designed for use in the typical idiom of :
80 p = SMB_REALLOC(p, size)
85 and not to have to keep track of the old 'p' contents to free later, nor
86 to worry if the size parameter was zero. In the case where NULL is returned
87 we guarentee that p has been freed.
89 If free later semantics are desired, then pass 'free_old_on_error' as False which
90 guarentees that the old contents are not freed on error, even if size == 0. To use
93 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
101 Changes were instigated by Coverity error checking. JRA.
102 ****************************************************************************/
104 void *Realloc(void *p, size_t size, bool free_old_on_error)
109 if (free_old_on_error) {
112 DEBUG(2,("Realloc asked for 0 bytes\n"));
116 #if defined(PARANOID_MALLOC_CHECKER)
118 ret = (void *)malloc_(size);
120 ret = (void *)realloc_(p,size);
124 ret = (void *)malloc(size);
126 ret = (void *)realloc(p,size);
131 if (free_old_on_error && p) {
134 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));