gl/malloc.c

   1 /* malloc() function that is glibc compatible.
   2
   3    Copyright (C) 1997-1998, 2006-2007, 2009-2010 Free Software Foundation, Inc.
   4
   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.
   9
  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.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* written by Jim Meyering and Bruno Haible */
  20
  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
  30
  31 /* Specification.  */
  32 #include <stdlib.h>
  33
  34 #include <errno.h>
  35
  36 /* Call the system's malloc below.  */
  37 #undef malloc
  38
  39 /* Allocate an N-byte block of memory from the heap.
  40    If N is zero, allocate a 1-byte block.  */
  41
  42 void *
  43 rpl_malloc (size_t n)
  44 {
  45   void *result;
  46
  47 #if NEED_MALLOC_GNU
  48   if (n == 0)
  49     n = 1;
  50 #endif
  51
  52   result = malloc (n);
  53
  54 #if !HAVE_MALLOC_POSIX
  55   if (result == NULL)
  56     errno = ENOMEM;
  57 #endif
  58
  59   return result;
  60 }