src/include/stddef.h

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