/*-
 * Copyright (c) 2018 VMware, Inc.
 *
 * SPDX-License-Identifier: (BSD-2-Clause OR GPL-2.0)
 */

/* Hash table for use in the APIs. */

#ifndef _VMCI_HASHTABLE_H_
#define _VMCI_HASHTABLE_H_

#include "vmci_defs.h"
#include "vmci_kernel_if.h"

struct vmci_hash_entry {
        struct vmci_handle      handle;
        int                     ref_count;
        struct vmci_hash_entry  *next;
};

struct vmci_hashtable {
        struct vmci_hash_entry  **entries;
        /* Number of buckets in above array. */
        int                     size;
        vmci_lock               lock;
};

struct  vmci_hashtable *vmci_hashtable_create(int size);
void    vmci_hashtable_destroy(struct vmci_hashtable *table);
void    vmci_hashtable_init_entry(struct vmci_hash_entry *entry,
            struct vmci_handle handle);
int     vmci_hashtable_add_entry(struct vmci_hashtable *table,
            struct vmci_hash_entry *entry);
int     vmci_hashtable_remove_entry(struct vmci_hashtable *table,
            struct vmci_hash_entry *entry);
struct  vmci_hash_entry *vmci_hashtable_get_entry(struct vmci_hashtable *table,
            struct vmci_handle handle);
void    vmci_hashtable_hold_entry(struct vmci_hashtable *table,
            struct vmci_hash_entry *entry);
int     vmci_hashtable_release_entry(struct vmci_hashtable *table,
            struct vmci_hash_entry *entry);
bool    vmci_hashtable_entry_exists(struct vmci_hashtable *table,
            struct vmci_handle handle);
void    vmci_hashtable_sync(struct vmci_hashtable *table);

#endif /* !_VMCI_HASHTABLE_H_ */