Merge branch 'linus' into x86/pat

[linux-2.6-omap-h63xx.git] / drivers / media / dvb / dvb-core / dvb_ringbuffer.h

diff --git a/drivers/media/dvb/dvb-core/dvb_ringbuffer.h b/drivers/media/dvb/dvb-core/dvb_ringbuffer.h
index fa476f662f82c453da2028ca8267fee6b6ae11f8..890826262966c16c709815d83e1e08ac68c08058 100644 (file)
--- a/drivers/media/dvb/dvb-core/dvb_ringbuffer.h
+++ b/drivers/media/dvb/dvb-core/dvb_ringbuffer.h
@@ -35,6 +35,7 @@ struct dvb_ringbuffer {
        ssize_t           size;
        ssize_t           pread;
        ssize_t           pwrite;
+       int               error;
 
        wait_queue_head_t queue;
        spinlock_t        lock;
@@ -68,6 +69,7 @@ struct dvb_ringbuffer {
 **     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.
 */
 
@@ -84,6 +86,13 @@ extern ssize_t dvb_ringbuffer_free(struct dvb_ringbuffer *rbuf);
 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 */
@@ -106,7 +115,7 @@ extern void dvb_ringbuffer_flush_spinlock_wakeup(struct dvb_ringbuffer *rbuf);
 ** returns number of bytes transferred or -EFAULT
 */
 extern ssize_t dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf, u8 *buf,
-                                  size_t len, int usermem);
+                                  size_t len, int usermem);
 
 
 /* write routines & macros */
@@ -121,7 +130,7 @@ extern ssize_t dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf, u8 *buf,
 ** returns number of bytes transferred or -EFAULT
 */
 extern ssize_t dvb_ringbuffer_write(struct dvb_ringbuffer *rbuf, const u8 *buf,
-                                   size_t len);
+                                   size_t len);
 
 
 /**
@@ -133,7 +142,7 @@ extern ssize_t dvb_ringbuffer_write(struct dvb_ringbuffer *rbuf, const u8 *buf,
  * returns Number of bytes written, or -EFAULT, -ENOMEM, -EVINAL.
  */
 extern ssize_t dvb_ringbuffer_pkt_write(struct dvb_ringbuffer *rbuf, u8* buf,
-                                       size_t len);
+                                       size_t len);
 
 /**
  * Read from a packet in the ringbuffer. Note: unlike dvb_ringbuffer_read(), this
@@ -149,7 +158,7 @@ extern ssize_t dvb_ringbuffer_pkt_write(struct dvb_ringbuffer *rbuf, u8* buf,
  * returns Number of bytes read, or -EFAULT.
  */
 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, int usermem);
 
 /**
  * Dispose of a packet in the ring buffer.