92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2019 Philippe Gerum <rpm@xenomai.org>
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*/
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#ifndef _EVL_COMPILER_H
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#define _EVL_COMPILER_H
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#include <sys/types.h>
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#include <stddef.h>
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#include <limits.h>
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#ifndef container_of
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#define container_of(ptr, type, member) \
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({ \
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const __typeof__(((type *)0)->member) *__mptr = (ptr); \
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(type *)((char *)__mptr - offsetof(type, member)); \
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})
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#endif
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#ifndef __stringify
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#define __stringify_1(x...) #x
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#define __stringify(x...) __stringify_1(x)
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#endif
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#ifndef __noreturn
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#define __noreturn __attribute__((__noreturn__))
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#endif
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#ifndef __must_check
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#define __must_check __attribute__((__warn_unused_result__))
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#endif
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#ifndef __weak
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#define __weak __attribute__((__weak__))
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#endif
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#ifndef __maybe_unused
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#define __maybe_unused __attribute__((__unused__))
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#endif
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#ifndef __aligned
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#define __aligned(__n) __attribute__((aligned (__n)))
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#endif
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#ifndef __deprecated
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#define __deprecated __attribute__((__deprecated__))
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#endif
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#ifndef __packed
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#define __packed __attribute__((__packed__))
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#endif
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#ifndef __alloc_size
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#define __alloc_size(__args) __attribute__((__alloc_size__(__args)))
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#endif
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#ifndef __align_to
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#define __align_to(__size, __al) (((__size) + (__al) - 1) & (~((__al) - 1)))
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#endif
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#define __lzcount(__x) \
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((__x) == 0 ? (int)(sizeof(__x) * __CHAR_BIT__) \
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: sizeof(__x) <= sizeof(int) ? \
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__builtin_clz((int)(__x)) + \
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(int)(sizeof(int) - sizeof(__x)) \
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: sizeof(__x) <= sizeof(long) ? \
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__builtin_clzl((long)__x) \
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: __builtin_clzll(__x))
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#define __tzcount(__x) \
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((__x) == 0 ? (int)(sizeof(__x) * __CHAR_BIT__) \
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: sizeof(__x) <= sizeof(int) ? \
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__builtin_ctz((int)(__x)) \
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: sizeof(__x) <= sizeof(long) ? \
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__builtin_ctzl((long)__x) \
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: __builtin_ctzll(__x))
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#define __force_read_access(__var) \
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do { \
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__typeof(__var) __v = *((volatile typeof(__var) *)&(__var)); \
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(void)__v; \
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} while (0)
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#define compiler_barrier() __asm__ __volatile__("": : :"memory")
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#define __memoff(__base, __addr) ((uintptr_t)((caddr_t)(__addr) - (caddr_t)(__base)))
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#define __memptr(__base, __off) ((void *)((caddr_t)(__base) + (__off)))
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#endif /* _EVL_COMPILER_H */
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