kernel - Handle spinlock indefinite wait edge case
[dragonfly.git] / contrib / grep / lib / malloc.c
blob00800a2848fa5a54d229d38511eba74d865aa98d
1 /* malloc() function that is glibc compatible.
3 Copyright (C) 1997-1998, 2006-2007, 2009-2015 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3, or (at your option)
8 any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>. */
18 /* written by Jim Meyering and Bruno Haible */
20 #define _GL_USE_STDLIB_ALLOC 1
21 #include <config.h>
22 /* Only the AC_FUNC_MALLOC macro defines 'malloc' already in config.h. */
23 #ifdef malloc
24 # define NEED_MALLOC_GNU 1
25 # undef malloc
26 /* Whereas the gnulib module 'malloc-gnu' defines HAVE_MALLOC_GNU. */
27 #elif GNULIB_MALLOC_GNU && !HAVE_MALLOC_GNU
28 # define NEED_MALLOC_GNU 1
29 #endif
31 #include <stdlib.h>
33 #include <errno.h>
35 /* Allocate an N-byte block of memory from the heap.
36 If N is zero, allocate a 1-byte block. */
38 void *
39 rpl_malloc (size_t n)
41 void *result;
43 #if NEED_MALLOC_GNU
44 if (n == 0)
45 n = 1;
46 #endif
48 result = malloc (n);
50 #if !HAVE_MALLOC_POSIX
51 if (result == NULL)
52 errno = ENOMEM;
53 #endif
55 return result;