[process] Include process name in debug messages
[ipxe.git] / src / include / stddef.h
1 #ifndef STDDEF_H
2 #define STDDEF_H
3
4 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
5
6 #include <stdint.h>
7
8 /** EFI headers also define NULL */
9 #undef NULL
10
11 /** Null pointer */
12 #define NULL ( ( void * ) 0 )
13
14 /**
15 * Get offset of a field within a structure
16 *
17 * @v type Structure type
18 * @v field Field within structure
19 * @ret offset Offset within structure
20 */
21 #if defined ( __GNUC__ ) && ( __GNUC__ > 3 )
22 #define offsetof( type, field ) __builtin_offsetof ( type, field )
23 #else
24 #define offsetof( type, field ) ( ( size_t ) &( ( ( type * ) NULL )->field ) )
25 #endif
26
27 /**
28 * Get containing structure
29 *
30 * @v ptr Pointer to contained field
31 * @v type Containing structure type
32 * @v field Field within containing structure
33 * @ret container Pointer to containing structure
34 */
35 #define container_of( ptr, type, field ) ( { \
36 type *__container; \
37 const volatile typeof ( __container->field ) *__field = (ptr); \
38 __container = ( ( ( void * ) __field ) - \
39 offsetof ( type, field ) ); \
40 __container; } )
41
42 /* __WCHAR_TYPE__ is defined by gcc and will change if -fshort-wchar is used */
43 #ifndef __WCHAR_TYPE__
44 #define __WCHAR_TYPE__ uint16_t
45 #endif
46 #ifndef __WINT_TYPE__
47 #define __WINT_TYPE__ int
48 #endif
49 typedef __WCHAR_TYPE__ wchar_t;
50 typedef __WINT_TYPE__ wint_t;
51
52 #endif /* STDDEF_H */