42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_UNION_FIND_H
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#define __LINUX_UNION_FIND_H
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/**
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* union_find.h - union-find data structure implementation
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*
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* This header provides functions and structures to implement the union-find
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* data structure. The union-find data structure is used to manage disjoint
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* sets and supports efficient union and find operations.
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*
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* See Documentation/core-api/union_find.rst for documentation and samples.
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*/
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struct uf_node {
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struct uf_node *parent;
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unsigned int rank;
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};
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/* This macro is used for static initialization of a union-find node. */
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#define UF_INIT_NODE(node) {.parent = &node, .rank = 0}
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/**
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* uf_node_init - Initialize a union-find node
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* @node: pointer to the union-find node to be initialized
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*
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* This function sets the parent of the node to itself and
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* initializes its rank to 0.
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*/
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static inline void uf_node_init(struct uf_node *node)
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{
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node->parent = node;
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node->rank = 0;
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}
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/* find the root of a node */
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struct uf_node *uf_find(struct uf_node *node);
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/* Merge two intersecting nodes */
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void uf_union(struct uf_node *node1, struct uf_node *node2);
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#endif /* __LINUX_UNION_FIND_H */
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