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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142/* SPDX-License-Identifier: GPL-2.0 */#ifndef __LINUX_UNION_FIND_H#define __LINUX_UNION_FIND_H/** * union_find.h - union-find data structure implementation * * This header provides functions and structures to implement the union-find * data structure. The union-find data structure is used to manage disjoint * sets and supports efficient union and find operations. * * See Documentation/core-api/union_find.rst for documentation and samples. */
struct uf_node { struct uf_node *parent; unsigned int rank;};
/* This macro is used for static initialization of a union-find node. */#define UF_INIT_NODE(node) {.parent = &node, .rank = 0}
/** * uf_node_init - Initialize a union-find node * @node: pointer to the union-find node to be initialized * * This function sets the parent of the node to itself and * initializes its rank to 0. */static inline void uf_node_init(struct uf_node *node){ node->parent = node; node->rank = 0;}
/* find the root of a node */struct uf_node *uf_find(struct uf_node *node);
/* Merge two intersecting nodes */void uf_union(struct uf_node *node1, struct uf_node *node2);
#endif /* __LINUX_UNION_FIND_H */