/*      $NetBSD: isns_task.h,v 1.1.1.1 2011/01/16 01:22:50 agc Exp $    */

/*-
* Copyright (c) 2004,2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* isns_task.h
*/

#ifndef _ISNS_TASK_H_
#define _ISNS_TASK_H_

#include <sys/event.h>

#define ISNS_TASK_DISCOVER_SERVER       0
#define ISNS_TASK_RECONNECT_SERVER      1
#define ISNS_TASK_SEND_PDU              2
#define ISNS_TASK_INIT_SOCKET_IO        3
#define ISNS_TASK_INIT_REFRESH          4
#define ISNS_NUM_TASKS                  5


union isns_task_var_u {
       struct {
               struct isns_trans_s *trans_p;
               struct isns_pdu_s *pdu_p;
       } send_pdu;

       struct {
               struct addrinfo *ai_p;
       } reconnect_server;

       struct {
               isns_socket_t sd;
               struct addrinfo *ai_p;
       } init_socket_io;

       struct {
               struct isns_refresh_s *ref_p;
       } init_refresh;

       void *data_p;
};

struct isns_task_s {
       uint8_t task_type;
       struct isns_config_s *cfg_p;
       union isns_task_var_u var;

       int waitable;
       pthread_mutex_t wait_mutex;
       pthread_cond_t wait_condvar;
       int wait_ref_count;

       SIMPLEQ_ENTRY(isns_task_s) taskq_entry;
};

typedef void (isns_task_handler)(struct isns_task_s *);

void isns_run_task(struct isns_task_s *);
void isns_end_task(struct isns_task_s *);
int isns_wait_task(struct isns_task_s *, const struct timespec *);

struct isns_task_s *isns_new_task(struct isns_config_s *, uint8_t, int);
void isns_free_task(struct isns_task_s *);
void isns_taskq_insert_tail(struct isns_config_s *, struct isns_task_s *);
void isns_taskq_insert_head(struct isns_config_s *, struct isns_task_s *);
struct isns_task_s *isns_taskq_remove(struct isns_config_s *);
struct isns_task_s *isns_taskq_remove_trans(struct isns_config_s *, uint16_t);


#endif /* !_ISNS_TASK_H_ */