/**
 * Copyright © 2019, Oracle and/or its affiliates. All rights reserved.
 *
 * Licensed under the Universal Permissive License v 1.0 as shown at
 * http://oss.oracle.com/licenses/upl
 *
 */
#ifndef INODEMAP_H
#define INODEMAP_H
/* Maintain a set of inodes */

#include <sys/stat.h>
#include <stdint.h>
#include <stdbool.h>

struct inodemap;

// An inodemap is a mapping from pairs (dev_t, ino_t) to values (which
// are void* pointers.)

struct inodemap *mk_inodemap(void);

struct inodemap *inodemap_destroy(struct inodemap *im,
                                  void (*destroy_value_fun)(void*));
// Destroy all the

bool
inodemap_lookup(struct inodemap *im,
                dev_t dev,
                ino_t inode,
                void const **value);
// Effect: If there's a value in the map for (dev,inode) then return
// true and set *value to that value.  Else return false.

void
inodemap_insert(struct inodemap *im, dev_t dev, ino_t inode, void *value);
// Effect: Create a map from (dev,inode) to value.
//
// Requires: There was no map from (dev, inode) before.


uint64_t inodemap_hash(dev_t dev, ino_t inode);
// Compute and return a hash of dev and inode.

#endif