/****************************************************************
 *								*
 *	Copyright 2001, 2010 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/
#ifndef HASHTAB_INT4_H
#define HASHTAB_INT4_H

/* Note that hashtab_addr has #define references to all items in this header file. Changes/additions
   should be reflected there as well.
*/

typedef struct
{
	uint4		key;
	void		*value;
} ht_ent_int4;

typedef struct hash_table_int4_struct
{
	ht_ent_int4 	*base;		/* base of array of hent_* entries */
	ht_ent_int4 	*top; 		/* top of array of hent_* entries */
	unsigned int 	size;		/* Hash table size */
	unsigned int 	initial_size;	/* Hash table initial size */
	ht_ent_int4	*spare_base;	/* spare array of hent_* entries */
	unsigned int 	spare_base_size;/* size of spare array */
	boolean_t	dont_compact;	/* if set, never perform compaction */
	boolean_t	dont_keep_spare_table; /* if set, don't keep a spare table */
	boolean_t	defer_base_release; /* if set don't release base, caller will free_base...() later */
	unsigned int 	count;		/* Number of valid entries */
	unsigned int 	del_count;	/* Number of entries marked deleted. */
	unsigned int 	exp_trigger_size;/* When exp_trigger_size entried are used, expand table */
	unsigned int 	cmp_trigger_size;/* When cmp_trigger_size reached compact table */
	sm_uc_ptr_t	entry_passed_thru;/* Bit vector used to determine whether a particular */
					/* ht_ent has been involved in a collision (meaning that */
					/* this value can't be marked empty on delete */
} hash_table_int4;

#define HTENT_EMPTY_INT4(tabent, type, htvalue) (!(htvalue = (type *)(tabent)->value))
#define HTENT_MARK_EMPTY_INT4(tabent) (tabent)->value = (void *)0L
#define HTENT_VALID_INT4(tabent, type, htvalue) (!(HTENT_EMPTY_INT4(tabent, type, htvalue)) && (HT_DELETED_ENTRY != htvalue))
#define COMPUTE_HASH_INT4(hkey, hash) hash = (*hkey)

/* Prototypes for int4 hash routines. See hashtab_implementation.h for detail interface and implementation */
void init_hashtab_int4(hash_table_int4 *table, int minsize, boolean_t dont_compact, boolean_t dont_keep_spare_table);
void expand_hashtab_int4(hash_table_int4 *table, int minsize);
boolean_t add_hashtab_int4(hash_table_int4 *table, uint4 *key, void *value,  ht_ent_int4 **tabentptr);
void *lookup_hashtab_int4(hash_table_int4 *table, uint4 *key);
void delete_hashtab_ent_int4(hash_table_int4 *table, ht_ent_int4 *tabent);
boolean_t delete_hashtab_int4(hash_table_int4 *table, uint4 *key);
void free_hashtab_int4(hash_table_int4 *table);
void reinitialize_hashtab_int4(hash_table_int4 *table);
void compact_hashtab_int4(hash_table_int4 *table);

#endif