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https://github.com/clearlinux/kvmtool.git
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e358b4fbdb
Interval rb-tree allows to directly store interval ranges and quickly lookup an overlap with a single point or a range. The helper is based on the kernel rb-tree implementation (located in <linux/rbtree.h>) which alows for the augmention of the classical rb-tree to be used as an interval tree. Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
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#ifndef KVM__LINUX_KERNEL_H_
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#define KVM__LINUX_KERNEL_H_
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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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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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#ifndef container_of
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/**
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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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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#endif
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#define min(x, y) ({ \
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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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#define max(x, y) ({ \
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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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#endif
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