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Alejandro Vallejo
91d4159a34
Currently libxl and the x86-emulator tests carry their own versions. Factor those out into the common macros header so every library can make use of it. This is required so the following patch can add this macro to a header used both in Xen and tools/libs. No functional change. Signed-off-by: Alejandro Vallejo <alejandro.vallejo@cloud.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
#ifndef __XEN_TOOLS_COMMON_MACROS__
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#define __XEN_TOOLS_COMMON_MACROS__
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/*
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* Caution:
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*
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* This header must be completely self-contained. There are no external
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* references to variables or functions allowed, as the file might be included
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* for different runtime environments, such as firmware or target and build
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* host programs.
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*/
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#ifndef BUILD_BUG_ON
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#define BUILD_BUG_ON(p) ({ _Static_assert(!(p), "!(" #p ")"); })
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#else
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#define BUILD_BUG_ON(p) ((void)sizeof(char[1 - 2 * !!(p)]))
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#endif
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#endif
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*a))
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#endif
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#ifndef MAX
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#define MAX(x, y) ((x) > (y) ? (x) : (y))
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#endif
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#ifndef MIN
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#define MIN(x, y) ((x) < (y) ? (x) : (y))
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#endif
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#ifndef min
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#define min(x, y) \
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({ \
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const typeof(x) _x = (x); \
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const typeof(y) _y = (y); \
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(void) (&_x == &_y); \
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(_x < _y) ? _x : _y; \
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})
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#endif
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#ifndef max
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#define max(x, y) \
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({ \
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const typeof(x) _x = (x); \
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const typeof(y) _y = (y); \
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(void)(&_x == &_y); \
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(_x > _y) ? _x : _y; \
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})
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#endif
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#ifndef min_t
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#define min_t(type, x, y) \
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({ \
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const type _x = (x); \
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const type _y = (y); \
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(_x < _y) ? _x: _y; \
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})
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#endif
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#ifndef max_t
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#define max_t(type, x, y) \
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({ \
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const type _x = (x); \
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const type _y = (y); \
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(_x > _y) ? _x: _y; \
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})
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#endif
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#ifndef ROUNDUP
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#define ROUNDUP(_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1))
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#endif
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#define MASK_EXTR(v, m) (((v) & (m)) / ((m) & -(m)))
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#define MASK_INSR(v, m) (((v) * ((m) & -(m))) & (m))
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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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#define container_of(ptr, type, member) ({ \
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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 __AC(X, Y) (X ## Y)
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#define _AC(X, Y) __AC(X, Y)
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#endif /* __XEN_TOOLS_COMMON_MACROS__ */
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