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[media] dvb_ringbuffer.h: document the define macros 

There are a few define macros not documented, because the ReST
output was causing more warnings.

Now that this got fixed, document them. While here, fix the
remaining coding style issues.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-08-29 10:01:06 -03:00
parent b6df512a9f
commit 9aa9d92890
1 changed files with 19 additions and 8 deletions
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27
drivers/media/dvb-core/dvb_ringbuffer.h
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@ -97,7 +97,6 @@ extern ssize_t dvb_ringbuffer_avail(struct dvb_ringbuffer *rbuf);
*/
extern void dvb_ringbuffer_reset(struct dvb_ringbuffer *rbuf);
/*
* read routines & macros
*/
@ -117,11 +116,21 @@ extern void dvb_ringbuffer_flush(struct dvb_ringbuffer *rbuf);
*/
extern void dvb_ringbuffer_flush_spinlock_wakeup(struct dvb_ringbuffer *rbuf);
/* DVB_RINGBUFFER_PEEK - peek at byte @offs: in the buffer */
/**
* DVB_RINGBUFFER_PEEK - peek at byte @offs in the buffer
*
* @rbuf: pointer to struct dvb_ringbuffer
* @offs: offset inside the ringbuffer
*/
#define DVB_RINGBUFFER_PEEK(rbuf, offs) \
(rbuf)->data[((rbuf)->pread + (offs)) % (rbuf)->size]
((rbuf)->data[((rbuf)->pread + (offs)) % (rbuf)->size])
/* advance read ptr by @num: bytes */
/**
* DVB_RINGBUFFER_SKIP - advance read ptr by @num bytes
*
* @rbuf: pointer to struct dvb_ringbuffer
* @num: number of bytes to advance
*/
#define DVB_RINGBUFFER_SKIP(rbuf, num) {\
(rbuf)->pread = ((rbuf)->pread + (num)) % (rbuf)->size;\
}
@ -155,12 +164,16 @@ extern ssize_t dvb_ringbuffer_read_user(struct dvb_ringbuffer *rbuf,
extern void dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf,
u8 *buf, size_t len);
/*
* write routines & macros
*/
/* write single byte to ring buffer */
/**
* DVB_RINGBUFFER_WRITE_BYTE - write single byte to ring buffer
*
* @rbuf: pointer to struct dvb_ringbuffer
* @byte: byte to write
*/
#define DVB_RINGBUFFER_WRITE_BYTE(rbuf, byte) \
{ (rbuf)->data[(rbuf)->pwrite] = (byte); \
(rbuf)->pwrite = ((rbuf)->pwrite + 1) % (rbuf)->size; }
@ -194,7 +207,6 @@ extern ssize_t dvb_ringbuffer_write(struct dvb_ringbuffer *rbuf, const u8 *buf,
extern ssize_t dvb_ringbuffer_write_user(struct dvb_ringbuffer *rbuf,
const u8 __user *buf, size_t len);
/**
* dvb_ringbuffer_pkt_write - Write a packet into the ringbuffer.
*
@ -265,5 +277,4 @@ extern void dvb_ringbuffer_pkt_dispose(struct dvb_ringbuffer *rbuf, size_t idx);
extern ssize_t dvb_ringbuffer_pkt_next(struct dvb_ringbuffer *rbuf,
size_t idx, size_t *pktlen);
#endif /* _DVB_RINGBUFFER_H_ */