/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-----------------------------------------------------------------------------
 * File:    H5Iprivate.h
 * Purpose: header file for ID API
 *---------------------------------------------------------------------------*/

/* avoid re-inclusion */
#ifndef _H5Iprivate_H
#define _H5Iprivate_H

#include "H5Ipublic.h"		/*include Public Definitions		     */

/* Private headers needed by this file */
#include "H5private.h"

/* Default sizes of the hash-tables for various atom groups */
#define H5I_ERRSTACK_HASHSIZE		64
#define H5I_FILEID_HASHSIZE		64
#define H5I_TEMPID_HASHSIZE		64
#define H5I_DATATYPEID_HASHSIZE		64
#define H5I_DATASPACEID_HASHSIZE	64
#define H5I_DATASETID_HASHSIZE		64
#define H5I_OID_HASHSIZE		64
#define H5I_GROUPID_HASHSIZE		64
#define H5I_ATTRID_HASHSIZE		64
#define H5I_TEMPBUFID_HASHSIZE		64
#define H5I_REFID_HASHSIZE		64
#define H5I_VFL_HASHSIZE		64
#define H5I_GENPROPCLS_HASHSIZE		64
#define H5I_GENPROPOBJ_HASHSIZE		128

/*
 * Function for freeing objects. This function will be called with an object
 * ID group number (object type) and a pointer to the object. The function
 * should free the object and return non-negative to indicate that the object
 * can be removed from the ID group. If the function returns negative
 * (failure) then the object will remain in the ID group.
 */
typedef herr_t (*H5I_free_t)(void*);

/* Type of the function to compare objects & keys */
typedef int (*H5I_search_func_t)(void *obj, const void *key);

/* Atom information structure used */
typedef struct H5I_id_info_t {
    hid_t	id;		/* ID for this info			    */
    unsigned	count;		/* ref. count for this atom		    */
    void	*obj_ptr;	/* pointer associated with the atom	    */
    struct H5I_id_info_t *next;	/* link to next atom (in case of hash-clash)*/
} H5I_id_info_t;

/* ID group structure used */
typedef struct {
    unsigned	count;		/*# of times this group has been initialized*/
    unsigned	reserved;	/*# of IDs to reserve for constant IDs	    */
    unsigned	wrapped;	/*whether the id count has wrapped around   */
    size_t	hash_size;	/*sizeof the hash table to store the IDs in */
    unsigned	ids;		/*current number of IDs held		    */
    unsigned	nextid;		/*ID to use for the next atom		    */
    H5I_free_t	free_func;	/*release object method	    		    */
    H5I_id_info_t **id_list;	/*pointer to an array of ptrs to IDs	    */
} H5I_id_group_t;

/* Private Functions in H5I.c */
__DLL__ int H5I_init_group(H5I_type_t grp, size_t hash_size, unsigned reserved,
			    H5I_free_t func);
__DLL__ int H5I_nmembers(H5I_type_t grp);
__DLL__ herr_t H5I_clear_group(H5I_type_t grp, hbool_t force);
__DLL__ herr_t H5I_destroy_group(H5I_type_t grp);
__DLL__ hid_t H5I_register(H5I_type_t grp, void *object);
__DLL__ void *H5I_object(hid_t id);
__DLL__ H5I_type_t H5I_get_type(hid_t id);
__DLL__ void *H5I_remove(hid_t id);
__DLL__ void *H5I_search(H5I_type_t grp, H5I_search_func_t func,
			 const void *key);
__DLL__ int H5I_inc_ref(hid_t id);
__DLL__ int H5I_dec_ref(hid_t id);
#endif