** *** read min. 1000, max. <bufsize> bytes ***
** avail = dvb_ringbuffer_avail(rbuf);
** if (avail >= 1000)
-** count = dvb_ringbuffer_read(rbuf, buffer, min(avail, bufsize), 0);
+** count = dvb_ringbuffer_read(rbuf, buffer, min(avail, bufsize));
** else
** ...
**
** to lock read or write operations.
** Two or more readers must be locked against each other.
** Flushing the buffer counts as a read operation.
+** Resetting the buffer counts as a read and write operation.
** Two or more writers must be locked against each other.
*/
extern ssize_t dvb_ringbuffer_avail(struct dvb_ringbuffer *rbuf);
+/*
+** Reset the read and write pointers to zero and flush the buffer
+** This counts as a read and write operation
+*/
+extern void dvb_ringbuffer_reset(struct dvb_ringbuffer *rbuf);
+
+
/* read routines & macros */
/* ---------------------- */
/* flush buffer */
** <usermem> specifies whether <buf> resides in user space
** returns number of bytes transferred or -EFAULT
*/
-extern ssize_t dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf, u8 *buf,
- size_t len, int usermem);
+extern ssize_t dvb_ringbuffer_read_user(struct dvb_ringbuffer *rbuf,
+ u8 __user *buf, size_t len);
+extern void dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf,
+ u8 *buf, size_t len);
/* write routines & macros */
* <usermem> Set to 1 if <buf> is in userspace.
* returns Number of bytes read, or -EFAULT.
*/
+extern ssize_t dvb_ringbuffer_pkt_read_user(struct dvb_ringbuffer *rbuf, size_t idx,
+ int offset, u8 __user *buf, size_t len);
extern ssize_t dvb_ringbuffer_pkt_read(struct dvb_ringbuffer *rbuf, size_t idx,
- int offset, u8* buf, size_t len, int usermem);
+ int offset, u8 *buf, size_t len);
/**
* Dispose of a packet in the ring buffer.