-/* read.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * Rewritten for new CAN queues 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: read_rtl.c - RT-Linux variant of read systemcall */
+/* */
+/* 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 */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl> */
+/* */
+/* 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. */
+/**************************************************************************/
#ifdef CAN_WITH_RTL
#include "../include/can_iortl.h"
/* This is the 'Normal' read handler for normal transmission messages */
-static inline
-ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
+static inline
+ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
char *buffer, size_t length)
{
int ret;
int bytes_to_copy;
struct canque_edge_t *qedge;
struct canque_slot_t *slot;
-
+
ret=canque_test_outslot(qends, &qedge, &slot);
if(ret<0){
if (nonblock_fl) {
*(msg_buff++)=slot->msg;
canque_free_outslot(qends, qedge, slot);
bytes_to_copy = length-sizeof(struct canmsg_t);
-
+
while (bytes_to_copy > 0) {
ret=canque_test_outslot(qends, &qedge, &slot);
if(ret<0)
ssize_t can_read_rtl_posix(struct rtl_file *fptr, char *buffer,
size_t length, loff_t *ppos)
{
- struct canuser_t *canuser =
+ struct canuser_t *canuser =
(struct canuser_t *)can_get_rtl_file_private_data(fptr);
struct canque_ends_t *qends;
int ret;