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isns_task.h revision 1.1 
      1 /*	$NetBSD: isns_task.h,v 1.1 2011/01/16 01:22:50 agc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2004,2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Wasabi Systems, Inc.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 /*
     32  * isns_task.h
     33  */
     34 
     35 #ifndef _ISNS_TASK_H_
     36 #define _ISNS_TASK_H_
     37 
     38 #include <sys/event.h>
     39 
     40 #define ISNS_TASK_DISCOVER_SERVER	0
     41 #define ISNS_TASK_RECONNECT_SERVER	1
     42 #define ISNS_TASK_SEND_PDU		2
     43 #define ISNS_TASK_INIT_SOCKET_IO	3
     44 #define ISNS_TASK_INIT_REFRESH		4
     45 #define ISNS_NUM_TASKS			5
     46 
     47 
     48 union isns_task_var_u {
     49 	struct {
     50 		struct isns_trans_s *trans_p;
     51 		struct isns_pdu_s *pdu_p;
     52 	} send_pdu;
     53 
     54 	struct {
     55 		struct addrinfo *ai_p;
     56 	} reconnect_server;
     57 
     58 	struct {
     59 		isns_socket_t sd;
     60 		struct addrinfo *ai_p;
     61 	} init_socket_io;
     62 
     63 	struct {
     64 		struct isns_refresh_s *ref_p;
     65 	} init_refresh;
     66 
     67 	void *data_p;
     68 };
     69 
     70 struct isns_task_s {
     71 	uint8_t task_type;
     72 	struct isns_config_s *cfg_p;
     73 	union isns_task_var_u var;
     74 
     75 	int waitable;
     76 	pthread_mutex_t wait_mutex;
     77 	pthread_cond_t wait_condvar;
     78 	int wait_ref_count;
     79 
     80 	SIMPLEQ_ENTRY(isns_task_s) taskq_entry;
     81 };
     82 
     83 typedef void (isns_task_handler)(struct isns_task_s *);
     84 
     85 void isns_run_task(struct isns_task_s *);
     86 void isns_end_task(struct isns_task_s *);
     87 int isns_wait_task(struct isns_task_s *, const struct timespec *);
     88 
     89 struct isns_task_s *isns_new_task(struct isns_config_s *, uint8_t, int);
     90 void isns_free_task(struct isns_task_s *);
     91 void isns_taskq_insert_tail(struct isns_config_s *, struct isns_task_s *);
     92 void isns_taskq_insert_head(struct isns_config_s *, struct isns_task_s *);
     93 struct isns_task_s *isns_taskq_remove(struct isns_config_s *);
     94 struct isns_task_s *isns_taskq_remove_trans(struct isns_config_s *, uint16_t);
     95 
     96 
     97 #endif /* !_ISNS_TASK_H_ */
     98