File: hash.h

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/* Copyright (c) 2008, UNINETT AS */
/* See LICENSE for licensing information. */

#include <stdint.h>
#include <pthread.h>

struct hash {
    struct list *hashlist;
    pthread_mutex_t mutex;
};

struct hash_entry {
    void *key;
    uint32_t keylen;
    void *data;
    struct list_node *next; /* used when walking through hash */
};

/* allocates and initialises hash structure; returns NULL if malloc fails */
struct hash *hash_create(void);

/* frees all memory associated with the hash */
void hash_destroy(struct hash *hash);

/* insert entry in hash; returns 1 if ok, 0 if malloc fails */
int hash_insert(struct hash *hash, void *key, uint32_t keylen, void *data);

/* reads entry from hash */
void *hash_read(struct hash *hash, void *key, uint32_t keylen);

/* extracts (read and remove) entry from hash */
void *hash_extract(struct hash *hash, void *key, uint32_t keylen);

/* returns first entry */
struct hash_entry *hash_first(struct hash *hash);

/* returns the next entry after the argument */
struct hash_entry *hash_next(struct hash_entry *entry);

/* Local Variables: */
/* c-file-style: "stroustrup" */
/* End: */