mirror of
https://github.com/checkpoint-restore/criu.git
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09348a277f
Separate commit for easier criu-dev <-> master transfer. Acked-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Adrian Reber <areber@redhat.com>
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
#ifndef __COMPILER_H__
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#define __COMPILER_H__
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/*
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* Various definitions for success build,
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* picked from various places, mostly from
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* the linux kernel.
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*/
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2 * !!(condition)]))
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#define __stringify_1(x...) #x
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#define __stringify(x...) __stringify_1(x)
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#define NORETURN __attribute__((__noreturn__))
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#define __packed __attribute__((__packed__))
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#define __used __attribute__((__used__))
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#define __maybe_unused __attribute__((unused))
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#define __always_unused __attribute__((unused))
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#define __section(S) __attribute__((__section__(#S)))
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#ifndef __always_inline
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#define __always_inline inline __attribute__((always_inline))
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#endif
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#ifndef always_inline
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#define always_inline __always_inline
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#endif
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#ifndef noinline
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#define noinline __attribute__((noinline))
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#endif
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#define __aligned(x) __attribute__((aligned(x)))
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) & ((TYPE *)0)->MEMBER)
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#endif
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#define barrier() asm volatile("" ::: "memory")
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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 __round_mask(x, y) ((__typeof__(x))((y)-1))
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#define round_up(x, y) ((((x)-1) | __round_mask(x, y)) + 1)
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#define round_down(x, y) ((x) & ~__round_mask(x, y))
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#define DIV_ROUND_UP(n, d) (((n) + (d)-1) / (d))
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#define ALIGN(x, a) (((x) + (a)-1) & ~((a)-1))
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#define min(x, y) \
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({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void)(&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; \
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})
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#define max(x, y) \
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({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void)(&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; \
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})
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#define is_log2(v) (((v) & ((v)-1)) == 0)
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#endif /* __COMPILER_H__ */
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