Edit File: prio_heap.h
#ifndef _LINUX_PRIO_HEAP_H #define _LINUX_PRIO_HEAP_H /* * Simple insertion-only static-sized priority heap containing * pointers, based on CLR, chapter 7 */ #include <linux/gfp.h> /** * struct ptr_heap - simple static-sized priority heap * @ptrs - pointer to data area * @max - max number of elements that can be stored in @ptrs * @size - current number of valid elements in @ptrs (in the range 0..@size-1 * @gt: comparison operator, which should implement "greater than" */ struct ptr_heap { void **ptrs; int max; int size; int (*gt)(void *, void *); }; /** * heap_init - initialize an empty heap with a given memory size * @heap: the heap structure to be initialized * @size: amount of memory to use in bytes * @gfp_mask: mask to pass to kmalloc() * @gt: comparison operator, which should implement "greater than" */ extern int heap_init(struct ptr_heap *heap, size_t size, gfp_t gfp_mask, int (*gt)(void *, void *)); /** * heap_free - release a heap's storage * @heap: the heap structure whose data should be released */ void heap_free(struct ptr_heap *heap); /** * heap_insert - insert a value into the heap and return any overflowed value * @heap: the heap to be operated on * @p: the pointer to be inserted * * Attempts to insert the given value into the priority heap. If the * heap is full prior to the insertion, then the resulting heap will * consist of the smallest @max elements of the original heap and the * new element; the greatest element will be removed from the heap and * returned. Note that the returned element will be the new element * (i.e. no change to the heap) if the new element is greater than all * elements currently in the heap. */ extern void *heap_insert(struct ptr_heap *heap, void *p); #endif /* _LINUX_PRIO_HEAP_H */