47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
#ifndef __COMPILER_H
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#define __COMPILER_H
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// Low level definitions for C languange and gcc compiler.
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#define barrier() __asm__ __volatile__("": : :"memory")
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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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#define noinline __attribute__((noinline))
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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 __visible __attribute__((externally_visible))
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#define __noreturn __attribute__((noreturn))
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#define PACKED __attribute__((packed))
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#ifndef __aligned
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#define __aligned(x) __attribute__((aligned(x)))
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#endif
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#ifndef __section
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#define __section(S) __attribute__((section(S)))
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#endif
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define ALIGN_DOWN(x,a) ((x) & ~((typeof(x))(a)-1))
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#define container_of(ptr, type, member) ({ \
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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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#define __stringify_1(x) #x
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#define __stringify(x) __stringify_1(x)
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#define ___PASTE(a,b) a##b
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#define __PASTE(a,b) ___PASTE(a,b)
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define DIV_ROUND_CLOSEST(x, divisor)({ \
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typeof(divisor) __divisor = divisor; \
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(((x) + ((__divisor) / 2)) / (__divisor)); \
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})
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#endif // compiler.h
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