197 #define DEFINE_FREE(_name, _type, _free) \  argument
198 	static inline void __free_##_name(void *p) { _type _T = *(_type *)p; _free; }
200 #define __free(_name)	__cleanup(__free_##_name)  argument
243 #define DEFINE_CLASS(_name, _type, _exit, _init, _init_args...)		\  argument
244 typedef _type class_##_name##_t;					\
245 static inline void class_##_name##_destructor(_type *p)			\
247 static inline _type class_##_name##_constructor(_init_args)		\
250 #define EXTEND_CLASS(_name, ext, _init, _init_args...)			\  argument
251 typedef class_##_name##_t class_##_name##ext##_t;			\
252 static inline void class_##_name##ext##_destructor(class_##_name##_t *p)\
253 { class_##_name##_destructor(p); }					\
254 static inline class_##_name##_t class_##_name##ext##_constructor(_init_args) \
255 { class_##_name##_t t = _init; return t; }
257 #define CLASS(_name, var)						\  argument
258 	class_##_name##_t var __cleanup(class_##_name##_destructor) =	\
259 		class_##_name##_constructor
291 #define __DEFINE_CLASS_IS_CONDITIONAL(_name, _is_cond)	\  argument
292 static __maybe_unused const bool class_##_name##_is_conditional = _is_cond
294 #define DEFINE_GUARD(_name, _type, _lock, _unlock) \  argument
295 	__DEFINE_CLASS_IS_CONDITIONAL(_name, false); \
296 	DEFINE_CLASS(_name, _type, if (_T) { _unlock; }, ({ _lock; _T; }), _type _T); \
297 	static inline void * class_##_name##_lock_ptr(class_##_name##_t *_T) \
300 #define DEFINE_GUARD_COND(_name, _ext, _condlock) \  argument
301 	__DEFINE_CLASS_IS_CONDITIONAL(_name##_ext, true); \
302 	EXTEND_CLASS(_name, _ext, \
304 		     class_##_name##_t _T) \
305 	static inline void * class_##_name##_ext##_lock_ptr(class_##_name##_t *_T) \
306 	{ return class_##_name##_lock_ptr(_T); }
308 #define guard(_name) \  argument
309 	CLASS(_name, __UNIQUE_ID(guard))
311 #define __guard_ptr(_name) class_##_name##_lock_ptr  argument
312 #define __is_cond_ptr(_name) class_##_name##_is_conditional  argument
323 #define __scoped_guard(_name, _label, args...)				\  argument
324 	for (CLASS(_name, scope)(args);					\
325 	     __guard_ptr(_name)(&scope) || !__is_cond_ptr(_name);	\
332 #define scoped_guard(_name, args...)	\  argument
333 	__scoped_guard(_name, __UNIQUE_ID(label), args)
335 #define __scoped_cond_guard(_name, _fail, _label, args...)		\  argument
336 	for (CLASS(_name, scope)(args); true; ({ goto _label; }))	\
337 		if (!__guard_ptr(_name)(&scope)) {			\
338 			BUILD_BUG_ON(!__is_cond_ptr(_name));		\
344 #define scoped_cond_guard(_name, _fail, args...)	\  argument
345 	__scoped_cond_guard(_name, _fail, __UNIQUE_ID(label), args)
366 #define __DEFINE_UNLOCK_GUARD(_name, _type, _unlock, ...)		\  argument
370 } class_##_name##_t;							\
372 static inline void class_##_name##_destructor(class_##_name##_t *_T)	\
377 static inline void *class_##_name##_lock_ptr(class_##_name##_t *_T)	\
383 #define __DEFINE_LOCK_GUARD_1(_name, _type, _lock)			\  argument
384 static inline class_##_name##_t class_##_name##_constructor(_type *l)	\
386 	class_##_name##_t _t = { .lock = l }, *_T = &_t;		\
391 #define __DEFINE_LOCK_GUARD_0(_name, _lock)				\  argument
392 static inline class_##_name##_t class_##_name##_constructor(void)	\
394 	class_##_name##_t _t = { .lock = (void*)1 },			\
400 #define DEFINE_LOCK_GUARD_1(_name, _type, _lock, _unlock, ...)		\  argument
401 __DEFINE_CLASS_IS_CONDITIONAL(_name, false);				\
402 __DEFINE_UNLOCK_GUARD(_name, _type, _unlock, __VA_ARGS__)		\
403 __DEFINE_LOCK_GUARD_1(_name, _type, _lock)
405 #define DEFINE_LOCK_GUARD_0(_name, _lock, _unlock, ...)			\  argument
406 __DEFINE_CLASS_IS_CONDITIONAL(_name, false);				\
407 __DEFINE_UNLOCK_GUARD(_name, void, _unlock, __VA_ARGS__)		\
408 __DEFINE_LOCK_GUARD_0(_name, _lock)
410 #define DEFINE_LOCK_GUARD_1_COND(_name, _ext, _condlock)		\  argument
411 	__DEFINE_CLASS_IS_CONDITIONAL(_name##_ext, true);		\
412 	EXTEND_CLASS(_name, _ext,					\
413 		     ({ class_##_name##_t _t = { .lock = l }, *_T = &_t;\
416 		     typeof_member(class_##_name##_t, lock) l)		\
417 	static inline void * class_##_name##_ext##_lock_ptr(class_##_name##_t *_T) \
418 	{ return class_##_name##_lock_ptr(_T); }