src/include/stddef.h

   1 #ifndef STDDEF_H
   2 #define STDDEF_H
   3
   4 #include <commonlib/helpers.h>
   5
   6 typedef long ptrdiff_t;
   7 #ifndef __SIZE_TYPE__
   8 #define __SIZE_TYPE__ unsigned long
   9 #endif
  10 typedef __SIZE_TYPE__ size_t;
  11 /* There is a GCC macro for a size_t type, but not
  12  * for a ssize_t type. Below construct tricks GCC
  13  * into making __SIZE_TYPE__ signed.
  14  */
  15 #define unsigned signed
  16 typedef __SIZE_TYPE__ ssize_t;
  17 #undef unsigned
  18
  19 typedef int wchar_t;
  20 typedef unsigned int wint_t;
  21
  22 #define NULL ((void *)0)
  23
  24 /* The devicetree data structures are only mutable in ramstage. All other
  25    stages have a constant devicetree. */
  26 #if !ENV_PAYLOAD_LOADER
  27 #define DEVTREE_EARLY 1
  28 #else
  29 #define DEVTREE_EARLY 0
  30 #endif
  31
  32 #if DEVTREE_EARLY
  33 #define DEVTREE_CONST const
  34 #else
  35 #define DEVTREE_CONST
  36 #endif
  37
  38 #if ENV_STAGE_HAS_DATA_SECTION
  39 #define MAYBE_STATIC_NONZERO static
  40 #else
  41 #define MAYBE_STATIC_NONZERO
  42 #endif
  43
  44 /* Provide a pointer to address 0 that thwarts any "accessing this is
  45  * undefined behaviour and do whatever" trickery in compilers.
  46  * Use when you _really_ need to read32(zeroptr) (ie. read address 0).
  47  */
  48 extern char zeroptr[];
  49
  50 #endif /* STDDEF_H */