libc/stdlib/__uc_malloc.c

   1 /* uClibc internal malloc.
   2    Copyright (C) 2007 Denys Vlasenko
   3
   4 This library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License
   6 version 2 as published by the Free Software Foundation.
   7
   8 This library is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 Library General Public License for more details.
  12
  13 You should have received a copy of the GNU Library General Public
  14 License along with this library; see the file COPYING.LIB.  If
  15 not, see <http://www.gnu.org/licenses/>.
  16
  17 */
  18
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <malloc.h>
  22
  23
  24 void (*__uc_malloc_failed)(size_t size) = NULL;
  25 /* Seemingly superfluous assigment of NULL above prevents gas error
  26  * ("__uc_malloc_failed can't be equated to common symbol
  27  * __GI___uc_malloc_failed") in libc_hidden_data_def: */
  28 libc_hidden_data_def(__uc_malloc_failed)
  29
  30 void *__uc_malloc(size_t size)
  31 {
  32         void *p;
  33
  34         while (1) {
  35                 p = malloc(size);
  36                 if (!size || p)
  37                         return p;
  38                 if (!__uc_malloc_failed)
  39                         _exit(1);
  40                 free(p);
  41                 __uc_malloc_failed(size);
  42         }
  43 }
  44 libc_hidden_def(__uc_malloc)