libc/sysdeps/linux/common/bits/uClibc_alloc.h

   1 /*
   2  * Macros to transparently switch between the stack and heap for large
   3  * allocations.  The former is useful on MMU systems as it results in
   4  * smaller code, but the latter is required on NoMMU systems.  This is
   5  * due to small stacks that cannot grow and so doing large allocs will
   6  * cause a stack overflow.
   7  *
   8  * Copyright (C) 2010 Mike Frysinger <vapier@gentoo.org>
   9  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  10  */
  11
  12 #ifndef _UCLIBC_ALLOC_H
  13 #define _UCLIBC_ALLOC_H
  14
  15 #include <alloca.h>
  16 #include <stdlib.h>
  17
  18 #ifdef __ARCH_USE_MMU__
  19 # define stack_heap_alloc(x) alloca(x)
  20 # define stack_heap_free(x)  do { if (0) free(x); } while (0)
  21 #else
  22 # define stack_heap_alloc(x) malloc(x)
  23 # define stack_heap_free(x)  free(x)
  24 #endif
  25
  26 #endif