/* select.c
* Header file for the Linux CAN-bus driver.
* Written by Arnaud Westenberg email:arnaud@wanadoo.nl
+ * Added by Pavel Pisa - OCERA team member
+ * email:pisa@cmp.felk.cvut.cz
* This software is released under the GPL-License.
- * Version 0.7.1-pi2 15 Nov 2002
- *
- * added by Pavel Pisa pisa@cmp.felk.cvut.cz
+ * Version lincan-0.3 17 Jun 2004
*/
-#include <linux/autoconf.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
-#define MODVERSIONS
-#endif
-
-#if defined (MODVERSIONS)
-#include <linux/modversions.h>
-#endif
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
+#include "../include/main.h"
-#include <linux/version.h>
#include <linux/poll.h>
-
-#include "../include/main.h"
#include "../include/select.h"
unsigned int can_poll(struct file *file, poll_table *wait)
{
- unsigned int mask = 0;
+ struct canuser_t *canuser = (struct canuser_t*)(file->private_data);
+ struct canque_ends_t *qends;
struct msgobj_t *obj;
- struct canfifo_t *fifo;
+ unsigned int mask = 0;
+ struct canque_edge_t *edge;
+ int full=0;
+ int i;
- /* Initialize hardware pointers */
- if ( (obj = objects_p[MINOR_NR]) == NULL) {
- CANMSG("Could not assign buffer structure\n");
- return 0;
- }
- if ( (fifo = obj->fifo) == NULL) {
- CANMSG("Could not assign buffer memory.\n");
- return 0;
+ if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
+ CANMSG("can_close: bad canuser magic\n");
+ return -ENODEV;
}
+
+ obj = canuser->msgobj;
+ qends = canuser->qends;
- if (file->f_mode & FMODE_WRITE) {
- poll_wait(file, &fifo->writeq, wait);
- }
if (file->f_mode & FMODE_READ) {
- poll_wait(file, &fifo->readq, wait);
+ poll_wait(file, &qends->endinfo.fileinfo.readq, wait);
+ for(i=CANQUEUE_PRIO_NR;--i>=0;) {
+ if(!list_empty(&qends->active[i]))
+ mask |= POLLIN | POLLRDNORM;
+ }
}
- if ((file->f_mode & FMODE_READ)&&
- (fifo->rx_readp != fifo->rx_writep)) {
- mask |= POLLIN | POLLRDNORM;
- }
- if ((file->f_mode & FMODE_WRITE)&&
- (fifo->tx_readp == fifo->tx_writep)) {
- mask |= POLLOUT | POLLWRNORM;
+
+ if ((file->f_mode & FMODE_WRITE) && !(file->f_flags & O_SYNC)) {
+ poll_wait(file, &qends->endinfo.fileinfo.writeq, wait);
+
+ canque_for_each_inedge(qends, edge) {
+ if(canque_fifo_test_fl(&edge->fifo,FULL))
+ full=1;
+ }
+
+ if(!full)
+ mask |= POLLOUT | POLLWRNORM;
+ }
+
+ if ((file->f_mode & FMODE_WRITE) && (file->f_flags & O_SYNC)) {
+ poll_wait(file, &qends->endinfo.fileinfo.emptyq, wait);
+
+ canque_for_each_inedge(qends, edge) {
+ if(!canque_fifo_test_fl(&edge->fifo,EMPTY))
+ full=1;
+ }
+
+ if(!full)
+ mask |= POLLOUT | POLLWRNORM;
}
return mask;
}