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/*********************************************************************
*
* Filename: irqueue.h
* Version: 0.3
* Description: General queue implementation
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Tue Jun 9 13:26:50 1998
* Modified at: Thu Jul 1 10:18:21 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (C) 1998-1999, Aage Kvalnes <aage@cs.uit.no>
* Copyright (c) 1998, Dag Brattli
* All Rights Reserved.
*
* This code is taken from the Vortex Operating System written by Aage
* Kvalnes and has been ported to Linux and Linux/IR by Dag Brattli
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/types.h>
#include <linux/spinlock.h>
#ifndef QUEUE_H
#define QUEUE_H
#define NAME_SIZE 32
/*
* Hash types
*/
#define HB_NOLOCK 0
#define HB_GLOBAL 1
#define HB_LOCAL 2
#define HB_SORTED 4
/*
* Hash defines
*/
#define HASHBIN_SIZE 8
#define HASHBIN_MASK 0x7
#ifndef ALIGN
#define ALIGN __attribute__((aligned))
#endif
typedef void (*FREE_FUNC)( void *arg);
/*
* Hashbin
*/
#define GET_HASHBIN(x) ( x & HASHBIN_MASK )
#define QUEUE struct queue_t
struct queue_t {
QUEUE* q_next;
QUEUE* q_prev;
char q_name[ NAME_SIZE];
__u32 q_hash;
};
typedef struct hashbin_t {
__u32 magic;
int hb_type;
int hb_size;
spinlock_t hb_mutex[ HASHBIN_SIZE ] ALIGN;
QUEUE* hb_queue[ HASHBIN_SIZE ] ALIGN;
QUEUE* hb_current;
} hashbin_t;
hashbin_t *hashbin_new(int type);
int hashbin_delete(hashbin_t* hashbin, FREE_FUNC func);
int hashbin_clear(hashbin_t* hashbin, FREE_FUNC free_func);
void hashbin_insert(hashbin_t* hashbin, QUEUE* entry, __u32 hashv,
char* name);
void* hashbin_find(hashbin_t* hashbin, __u32 hashv, char* name);
void* hashbin_remove(hashbin_t* hashbin, __u32 hashv, char* name);
void* hashbin_remove_first(hashbin_t *hashbin);
QUEUE *hashbin_get_first(hashbin_t *hashbin);
QUEUE *hashbin_get_next(hashbin_t *hashbin);
void enqueue_last(QUEUE **queue, QUEUE* element);
void enqueue_first(QUEUE **queue, QUEUE* element);
QUEUE *dequeue_first(QUEUE **queue);
/*
* Function hashbin_get_size (hashbin)
*
* Returns the number of elements in the hashbin
*
*/
extern __inline__ int hashbin_get_size(hashbin_t* hashbin)
{
return hashbin->hb_size;
}
#endif
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