Xenomai  3.0.8
rtcan_list.h
1 /*
2  * List management for the RTDM RTCAN device driver
3  *
4  * Copyright (C) 2005,2006 Sebastian Smolorz
5  * <Sebastian.Smolorz@stud.uni-hannover.de>
6  *
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software Foundation,
20  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21  */
22 
23 #ifndef __RTCAN_LIST_H_
24 #define __RTCAN_LIST_H_
25 
26 #include "rtcan_socket.h"
27 
28 
29 /*
30  * List element in a single linked list used for registering reception sockets.
31  * Every single struct can_filter which was bound to a socket gets such a
32  * list entry. There is no member for the CAN interface because there is one
33  * reception list for every CAN controller. This is because when a CAN message
34  * is received it is clear from which interface and therefore minimizes
35  * searching time.
36  */
37 struct rtcan_recv {
38  can_filter_t can_filter; /* filter used for deciding if
39  * a socket wants to get a CAN
40  * message */
41  unsigned int match_count; /* count accepted messages */
42  struct rtcan_socket *sock; /* pointer to registered socket
43  */
44  struct rtcan_recv *next; /* pointer to next list element
45  */
46 };
47 
48 
49 /*
50  * Element in a TX wait queue.
51  *
52  * Every socket holds a TX wait queue where all RT tasks are queued when they
53  * are blocked while waiting to be able to transmit a message via this socket.
54  *
55  * Every sender holds its own element.
56  */
57 struct tx_wait_queue {
58  struct list_head tx_wait_list; /* List pointers */
59  rtdm_task_t *rt_task; /* Pointer to task handle */
60 };
61 
62 
63 /* Spinlock for all reception lists and also for some members in
64  * struct rtcan_socket */
65 extern rtdm_lock_t rtcan_recv_list_lock;
66 
67 
68 #endif /* __RTCAN_LIST_H_ */
ipipe_spinlock_t rtdm_lock_t
Lock variable.
Definition: driver.h:551
Filter for reception of CAN messages.
Definition: can.h:287