RTEMS: cpukit/include/rtems/score/basedefs.h Source File

| RTEMS 5.4-rc2

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basedefs.h
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1
9/*
10 * COPYRIGHT (c) 1989-2007.
11 * On-Line Applications Research Corporation (OAR).
12 *
13 * Copyright (C) 2010, 2019 embedded brains GmbH
14 *
15 * The license and distribution terms for this file may be
16 * found in the file LICENSE in this distribution or at
17 * http://www.rtems.org/license/LICENSE.
18 */
19
20#ifndef _RTEMS_BASEDEFS_H
21#define _RTEMS_BASEDEFS_H
22
31#include <rtems/score/cpuopts.h>
32
33#ifndef ASM
34 #include <stddef.h>
35 #include <stdbool.h>
36 #include <stdint.h>
37#endif
38
39#ifndef TRUE
43 #define TRUE 1
44#endif
45
46#ifndef FALSE
50 #define FALSE 0
51#endif
52
53#if TRUE == FALSE
54 #error "TRUE equals FALSE"
55#endif
56
63#ifdef __GNUC__
64 #define RTEMS_INLINE_ROUTINE static __inline__
65#else
66 #define RTEMS_INLINE_ROUTINE static inline
67#endif
68
74#ifdef __GNUC__
75 #define RTEMS_COMPILER_MEMORY_BARRIER() __asm__ volatile("" ::: "memory")
76#else
77 #define RTEMS_COMPILER_MEMORY_BARRIER()
78#endif
79
84#ifdef __GNUC__
85 #define RTEMS_NO_INLINE __attribute__((__noinline__))
86#else
87 #define RTEMS_NO_INLINE
88#endif
89
97#if defined(RTEMS_SCHEDSIM)
98 #define RTEMS_NO_RETURN
99#elif defined(__GNUC__) && !defined(RTEMS_DEBUG)
100 #define RTEMS_NO_RETURN __attribute__((__noreturn__))
101#else
102 #define RTEMS_NO_RETURN
103#endif
104
105/* Provided for backward compatibility */
106#define RTEMS_COMPILER_NO_RETURN_ATTRIBUTE RTEMS_NO_RETURN
107
113#ifdef __GNUC__
114 #define RTEMS_CONST __attribute__((__const__))
115#else
116 #define RTEMS_CONST
117#endif
118
125#ifdef __GNUC__
126 #define RTEMS_PURE __attribute__((__pure__))
127#else
128 #define RTEMS_PURE
129#endif
130
131/* Provided for backward compatibility */
132#define RTEMS_COMPILER_PURE_ATTRIBUTE RTEMS_PURE
133
138#ifdef __GNUC__
139 #define RTEMS_DEPRECATED __attribute__((__deprecated__))
140#else
141 #define RTEMS_DEPRECATED
142#endif
143
144/* Provided for backward compatibility */
145#define RTEMS_COMPILER_DEPRECATED_ATTRIBUTE RTEMS_DEPRECATED
146
151#if defined(__GNUC__)
152 #define RTEMS_SECTION( _section ) __attribute__((__section__(_section)))
153#else
154 #define RTEMS_SECTION( _section )
155#endif
156
160#if defined(__GNUC__)
161 #define RTEMS_USED __attribute__((__used__))
162#else
163 #define RTEMS_USED
164#endif
165
171#if defined(__GNUC__)
172 #define RTEMS_UNUSED __attribute__((__unused__))
173#else
174 #define RTEMS_UNUSED
175#endif
176
177/* Provided for backward compatibility */
178#define RTEMS_COMPILER_UNUSED_ATTRIBUTE RTEMS_UNUSED
179
184#if defined(__GNUC__)
185 #define RTEMS_PACKED __attribute__((__packed__))
186#else
187 #define RTEMS_PACKED
188#endif
189
194#if defined(__GNUC__)
195 #define RTEMS_ALIAS( _target ) __attribute__((__alias__(#_target)))
196#else
197 #define RTEMS_ALIAS( _target )
198#endif
199
204#if defined(__GNUC__)
205 #define RTEMS_WEAK_ALIAS( _target ) __attribute__((__weak__, __alias__(#_target)))
206#else
207 #define RTEMS_WEAK_ALIAS( _target )
208#endif
209
213#if defined(__GNUC__)
214 #define RTEMS_ALIGNED( _alignment ) __attribute__((__aligned__(_alignment)))
215#else
216 #define RTEMS_ALIGNED( _alignment )
217#endif
218
219/* Provided for backward compatibility */
220#define RTEMS_COMPILER_PACKED_ATTRIBUTE RTEMS_PACKED
221
222#if defined(RTEMS_DEBUG) && !defined(RTEMS_SCHEDSIM)
223 #define _Assert_Unreachable() _Assert( 0 )
224#else
225 #define _Assert_Unreachable() do { } while ( 0 )
226#endif
227
231#if defined(__GNUC__) && !defined(RTEMS_SCHEDSIM)
232 #define RTEMS_UNREACHABLE() \
233 do { \
234 __builtin_unreachable(); \
235 _Assert_Unreachable(); \
236 } while ( 0 )
237#else
238 #define RTEMS_UNREACHABLE() _Assert_Unreachable()
239#endif
240
245#if defined(__GNUC__)
246 #define RTEMS_PRINTFLIKE( _format_pos, _ap_pos ) \
247 __attribute__((__format__(__printf__, _format_pos, _ap_pos)))
248#else
249 #define RTEMS_PRINTFLIKE( _format_pos, _ap_pos )
250#endif
251
256#if defined(__GNUC__)
257 #define RTEMS_MALLOCLIKE __attribute__((__malloc__))
258#else
259 #define RTEMS_MALLOCLIKE
260#endif
261
266#if defined(__GNUC__)
267 #define RTEMS_ALLOC_SIZE( _index ) __attribute__((__alloc_size__(_index)))
268#else
269 #define RTEMS_ALLOC_SIZE( _index )
270#endif
271
276#if defined(__GNUC__)
277 #define RTEMS_ALLOC_SIZE_2( _count_index, _size_index ) \
278 __attribute__((__alloc_size__(_count_index, _size_index)))
279#else
280 #define RTEMS_ALLOC_SIZE_2( _count_index, _size_index )
281#endif
282
287#if defined(__GNUC__)
288 #define RTEMS_ALLOC_ALIGN( _index ) __attribute__((__alloc_align__(_index)))
289#else
290 #define RTEMS_ALLOC_ALIGN( _index )
291#endif
292
296#if defined(__GNUC__)
297 #define RTEMS_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
298#else
299 #define RTEMS_WARN_UNUSED_RESULT
300#endif
301
308#if defined(__GNUC__)
309 #define RTEMS_OBFUSCATE_VARIABLE( _var ) __asm__("" : "+r" (_var))
310#else
311 #define RTEMS_OBFUSCATE_VARIABLE( _var ) (void) (_var)
312#endif
313
321#define RTEMS_DECLARE_GLOBAL_SYMBOL( _name ) \
322 extern char _name[]
323
330#if defined(__USER_LABEL_PREFIX__)
331 #define RTEMS_SYMBOL_NAME( _name ) \
332 RTEMS_XCONCAT( __USER_LABEL_PREFIX__, _name )
333#else
334 /* Helper to perform the macro expansion */
335 #define _RTEMS_SYMBOL_NAME( _name ) _name
336
337 #define RTEMS_SYMBOL_NAME( _name ) _RTEMS_SYMBOL_NAME( _name )
338#endif
339
352#if defined(__GNUC__)
353 #define RTEMS_DEFINE_GLOBAL_SYMBOL( _name, _value ) \
354 __asm__( \
355 "\t.globl " RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) \
356 "\n\t.set " RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) \
357 ", " RTEMS_STRING( _value ) "\n" \
358 )
359#else
360 #define RTEMS_DEFINE_GLOBAL_SYMBOL( _name, _value )
361#endif
362
371#if defined(__GNUC__)
372 #define RTEMS_PREDICT_TRUE( _exp ) __builtin_expect( ( _exp ), 1 )
373#else
374 #define RTEMS_PREDICT_TRUE( _exp ) ( _exp )
375#endif
376
385#if defined(__GNUC__)
386 #define RTEMS_PREDICT_FALSE( _exp ) __builtin_expect( ( _exp ), 0 )
387#else
388 #define RTEMS_PREDICT_FALSE( _exp ) ( _exp )
389#endif
390
396#if defined(__GNUC__)
397 #define RTEMS_RETURN_ADDRESS() __builtin_return_address( 0 )
398#else
399 #define RTEMS_RETURN_ADDRESS() NULL
400#endif
401
402#if __cplusplus >= 201103L
403 #define RTEMS_STATIC_ASSERT(cond, msg) \
404 static_assert(cond, # msg)
405#elif __STDC_VERSION__ >= 201112L
406 #define RTEMS_STATIC_ASSERT(cond, msg) \
407 _Static_assert(cond, # msg)
408#else
409 #define RTEMS_STATIC_ASSERT(cond, msg) \
410 struct rtems_static_assert_ ## msg \
411 { int rtems_static_assert_ ## msg : (cond) ? 1 : -1; }
412#endif
413
414#define RTEMS_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
415
416/*
417 * Zero-length arrays are valid in C99 as flexible array members. C++11
418 * doesn't allow flexible array members. Use the GNU extension which is also
419 * supported by other compilers.
420 */
421#define RTEMS_ZERO_LENGTH_ARRAY 0
422
430#define RTEMS_CONTAINER_OF( _m, _type, _member_name ) \
431 ( (_type *) ( (uintptr_t) ( _m ) - offsetof( _type, _member_name ) ) )
432
433#ifdef __cplusplus
434#define RTEMS_DEQUALIFY_DEPTHX( _ptr_level, _type, _var ) \
435 (const_cast<_type>( _var ))
436#else /* Standard C code */
437
438/* The reference type idea based on libHX by Jan Engelhardt */
439#define RTEMS_TYPEOF_REFX(_ptr_level, _ptr_type) \
440 __typeof__(_ptr_level(union { int z; __typeof__(_ptr_type) x; }){0}.x)
441
442#if defined(__GNUC__) && !defined(ASM)
443#if ((__GNUC__ * 1000 + __GNUC_MINOR__) >= 4004)
444extern void* RTEMS_DEQUALIFY_types_not_compatible(void)
445 __attribute__((error ("RTEMS_DEQUALIFY types differ not only by volatile and const")));
446#else
447extern void RTEMS_DEQUALIFY_types_not_compatible(void);
448#endif
449#define RTEMS_DEQUALIFY_DEPTHX( _ptr_level, _type, _var ) ( \
450 __builtin_choose_expr( __builtin_types_compatible_p ( \
451 RTEMS_TYPEOF_REFX( _ptr_level, _var ), \
452 RTEMS_TYPEOF_REFX( _ptr_level, _type ) \
453 ) || __builtin_types_compatible_p ( _type, void * ), \
454 (_type)(_var), \
455 RTEMS_DEQUALIFY_types_not_compatible() \
456 ) \
457)
458#endif /*__GNUC__*/
459#endif /*__cplusplus*/
460
461#ifndef RTEMS_DECONST
462#ifdef RTEMS_DEQUALIFY_DEPTHX
463#define RTEMS_DECONST( _type, _var ) \
464 RTEMS_DEQUALIFY_DEPTHX( *, _type, _var )
465#else /*RTEMS_DEQUALIFY_DEPTHX*/
472#define RTEMS_DECONST( _type, _var ) \
473 ((_type)(uintptr_t)(const void *) ( _var ))
474
475#endif /*RTEMS_DEQUALIFY_DEPTHX*/
476#endif /*RTEMS_DECONST*/
477
478#ifndef RTEMS_DEVOLATILE
479#ifdef RTEMS_DEQUALIFY_DEPTHX
480#define RTEMS_DEVOLATILE( _type, _var ) \
481 RTEMS_DEQUALIFY_DEPTHX( *, _type, _var )
482#else /*RTEMS_DEQUALIFY_DEPTHX*/
489#define RTEMS_DEVOLATILE( _type, _var ) \
490 ((_type)(uintptr_t)(volatile void *) ( _var ))
491
492#endif /*RTEMS_DEQUALIFY_DEPTHX*/
493#endif /*RTEMS_DEVOLATILE*/
494
495#ifndef RTEMS_DEQUALIFY
496#ifdef RTEMS_DEQUALIFY_DEPTHX
497#define RTEMS_DEQUALIFY( _type, _var ) \
498 RTEMS_DEQUALIFY_DEPTHX( *, _type, _var )
499#else /*RTEMS_DEQUALIFY_DEPTHX*/
506#define RTEMS_DEQUALIFY( _type, _var ) \
507 ((_type)(uintptr_t)(const volatile void *) ( _var ))
508
509#endif /*RTEMS_DEQUALIFY_DEPTHX*/
510#endif /*RTEMS_DEQUALIFY*/
511
520#ifdef __GNUC__
521 #define RTEMS_HAVE_MEMBER_SAME_TYPE( _t_lhs, _m_lhs, _t_rhs, _m_rhs ) \
522 __builtin_types_compatible_p( \
523 __typeof__( ( (_t_lhs *) 0 )->_m_lhs ), \
524 __typeof__( ( (_t_rhs *) 0 )->_m_rhs ) \
525 )
526#else
527 #define RTEMS_HAVE_MEMBER_SAME_TYPE( _t_lhs, _m_lhs, _t_rhs, _m_rhs ) \
528 true
529#endif
530
534#define RTEMS_CONCAT( _x, _y ) _x##_y
535
539#define RTEMS_XCONCAT( _x, _y ) RTEMS_CONCAT( _x, _y )
540
544#define RTEMS_STRING( _x ) #_x
545
549#define RTEMS_XSTRING( _x ) RTEMS_STRING( _x )
550
551#ifndef ASM
552 #ifdef RTEMS_DEPRECATED_TYPES
553 typedef bool boolean RTEMS_DEPRECATED;
554 typedef float single_precision RTEMS_DEPRECATED;
555 typedef double double_precision RTEMS_DEPRECATED;
556 #endif
557
561 typedef void * proc_ptr RTEMS_DEPRECATED;
562#endif
563
566#endif /* _RTEMS_BASEDEFS_H */
RTEMS_DEPRECATED
#define RTEMS_DEPRECATED
Public name for task floating point context area.
Definition: basedefs.h:141
__attribute__
Definition: jffs2.h:92