-/* can_queue.h - CAN queues and message passing infrastructure
- * Linux CAN-bus device driver.
- * Written by Pavel Pisa - OCERA team member
- * email:pisa@cmp.felk.cvut.cz
- * This software is released under the GPL-License.
- * Version lincan-0.3 17 Jun 2004
- */
+/**************************************************************************/
+/* File: can_queue.h - CAN queues and message passing infrastructure */
+/* */
+/* LinCAN - (Not only) Linux CAN bus driver */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz> */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz> */
+/* Funded by OCERA and FRESCOR IST projects */
+/* */
+/* LinCAN is free software; you can redistribute it and/or modify it */
+/* under terms of the GNU General Public License as published by the */
+/* Free Software Foundation; either version 2, or (at your option) any */
+/* later version. LinCAN is distributed in the hope that it will be */
+/* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
+/* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
+/* General Public License for more details. You should have received a */
+/* copy of the GNU General Public License along with LinCAN; see file */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
+/* Cambridge, MA 02139, USA. */
+/* */
+/* To allow use of LinCAN in the compact embedded systems firmware */
+/* and RT-executives (RTEMS for example), main authors agree with next */
+/* special exception: */
+/* */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce */
+/* an application image/executable, does not by itself cause the */
+/* resulting application image/executable to be covered by */
+/* the GNU General Public License. */
+/* This exception does not however invalidate any other reasons */
+/* why the executable file might be covered by the GNU Public License. */
+/* Publication of enhanced or derived LinCAN files is required although. */
+/**************************************************************************/
#ifndef _CAN_QUEUE_H
#define _CAN_QUEUE_H
/* Forward declarations for external types */
struct msgobj_t;
-struct chip_t;
+struct canchip_t;
/**
* struct canque_edge_t - CAN message delivery subsystem graph edge
#endif /*CAN_WITH_RTL*/
struct {
struct msgobj_t *msgobj;
- struct chip_t *chip;
+ struct canchip_t *chip;
#ifndef CAN_WITH_RTL
wait_queue_head_t daemonq;
#else /*CAN_WITH_RTL*/
/**
* canque_edge_incref - increments edge reference count
- * @qedg: pointer to the edge structure
+ * @edge: pointer to the edge structure
*/
static inline
void canque_edge_incref(struct canque_edge_t *edge)
}
static inline
-can_spin_irqflags_t canque_edge_lock_both_ends(struct canque_edge_t *edge)
+can_spin_irqflags_t canque_edge_lock_both_ends(struct canque_ends_t *inends, struct canque_ends_t *outends)
{
can_spin_irqflags_t flags;
- if(edge->inends<edge->outends) {
- can_spin_lock_irqsave(&edge->inends->ends_lock, flags);
- can_spin_lock(&edge->outends->ends_lock);
+ if(inends<outends) {
+ can_spin_lock_irqsave(&inends->ends_lock, flags);
+ can_spin_lock(&outends->ends_lock);
}else{
- can_spin_lock_irqsave(&edge->outends->ends_lock, flags);
- if(edge->outends!=edge->inends) can_spin_lock(&edge->inends->ends_lock);
+ can_spin_lock_irqsave(&outends->ends_lock, flags);
+ if(outends!=inends) can_spin_lock(&inends->ends_lock);
}
return flags;
}
static inline
-void canque_edge_unlock_both_ends(struct canque_edge_t *edge, can_spin_irqflags_t flags)
+void canque_edge_unlock_both_ends(struct canque_ends_t *inends, struct canque_ends_t *outends, can_spin_irqflags_t flags)
{
- if(edge->outends!=edge->inends) can_spin_unlock(&edge->outends->ends_lock);
- can_spin_unlock_irqrestore(&edge->inends->ends_lock, flags);
+ if(outends!=inends) can_spin_unlock(&outends->ends_lock);
+ can_spin_unlock_irqrestore(&inends->ends_lock, flags);
}
/* Non-inlined version of edge reference decrement */
{
can_spin_irqflags_t flags;
int dead_fl=0;
+ struct canque_ends_t *inends=edge->inends;
+ struct canque_ends_t *outends=edge->outends;
- flags=canque_edge_lock_both_ends(edge);
+ flags=canque_edge_lock_both_ends(inends, outends);
if(atomic_dec_and_test(&edge->edge_used)) {
dead_fl=!canque_fifo_test_and_set_fl(&edge->fifo,DEAD);
/* Because of former evolution of edge references
management notify of CANQUEUE_NOTIFY_NOUSR could
be moved to canque_edge_do_dead :-) */
}
- canque_edge_unlock_both_ends(edge, flags);
+ canque_edge_unlock_both_ends(inends, outends, flags);
if(dead_fl) canque_edge_do_dead(edge);
}
#ifndef CAN_HAVE_ARCH_CMPXCHG
/**
* canque_edge_decref - decrements edge reference count
- * @qedg: pointer to the edge structure
+ * @edge: pointer to the edge structure
*
* This function has to be called without lock held for both ends of edge.
* If reference count drops to 0, function canque_edge_do_dead()
projects / lincan.git / blobdiff