include/alloca.h

   1 #ifndef _ALLOCA_H
   2
   3 #include <stdlib/alloca.h>
   4
   5 # ifndef _ISOMAC
   6
   7 #include <stackinfo.h>
   8
   9 #undef  __alloca
  10
  11 /* Now define the internal interfaces.  */
  12 extern void *__alloca (size_t __size);
  13
  14 #ifdef  __GNUC__
  15 # define __alloca(size) __builtin_alloca (size)
  16 #endif /* GCC.  */
  17
  18 extern int __libc_use_alloca (size_t size) __attribute__ ((const));
  19 extern int __libc_alloca_cutoff (size_t size) __attribute__ ((const));
  20 libc_hidden_proto (__libc_alloca_cutoff)
  21
  22 #define __MAX_ALLOCA_CUTOFF     65536
  23
  24 #include <allocalim.h>
  25
  26 #if defined stackinfo_get_sp && defined stackinfo_sub_sp
  27 # define alloca_account(size, avar) \
  28   ({ void *old__ = stackinfo_get_sp ();                                       \
  29      void *m__ = __alloca (size);                                             \
  30      avar += stackinfo_sub_sp (old__);                                        \
  31      m__; })
  32 #else
  33 # define alloca_account(size, avar) \
  34   ({ size_t s__ = (size);                                                     \
  35      avar += s__;                                                             \
  36      __alloca (s__); })
  37 #endif
  38
  39 # endif /* !_ISOMAC */
  40 #endif