/*
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* Copyright (C) 2013 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef _BOILERPLATE_COMPILER_H
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#define _BOILERPLATE_COMPILER_H
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#include <stddef.h>
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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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#define __stringify_1(x...) #x
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#define __stringify(x...) __stringify_1(x)
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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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#define __align_to(__size, __al) (((__size) + (__al) - 1) & (~((__al) - 1)))
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define xenomai_count_trailing_zeros(x) \
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((x) == 0 ? (int)(sizeof(x) * __CHAR_BIT__) \
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: sizeof(x) <= sizeof(unsigned int) ? \
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__builtin_ctz((unsigned int)x) \
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: sizeof(x) <= sizeof(unsigned long) ? \
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__builtin_ctzl((unsigned long)x) \
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: __builtin_ctzll(x))
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#define xenomai_count_leading_zeros(x) \
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((x) == 0 ? (int)(sizeof(x) * __CHAR_BIT__) \
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: sizeof(x) <= sizeof(unsigned int) ? \
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__builtin_clz((unsigned int)x) + \
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(int)(sizeof(unsigned int) - sizeof(x)) \
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: sizeof(x) <= sizeof(unsigned long) ? \
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__builtin_clzl((unsigned long)x) \
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: __builtin_clzll(x))
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#ifdef __cplusplus
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}
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#endif
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#endif /* _BOILERPLATE_COMPILER_H */
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