44 	rbuf->pread=rbuf->pwrite=0;  in dvb_ringbuffer_init()
58 	return (rbuf->pread==rbuf->pwrite);  in dvb_ringbuffer_empty()
67 	free = rbuf->pread - rbuf->pwrite;  in dvb_ringbuffer_free()
79 	avail = rbuf->pwrite - rbuf->pread;  in dvb_ringbuffer_avail()
89 	rbuf->pread = rbuf->pwrite;  in dvb_ringbuffer_flush()
96 	rbuf->pread = rbuf->pwrite = 0;  in dvb_ringbuffer_reset()
155 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write()
158 		memcpy(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write()
161 		rbuf->pwrite = 0;  in dvb_ringbuffer_write()
163 	memcpy(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write()
164 	rbuf->pwrite = (rbuf->pwrite + todo) % rbuf->size;  in dvb_ringbuffer_write()
176 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write_user()
179 		status = copy_from_user(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write_user()
184 		rbuf->pwrite = 0;  in dvb_ringbuffer_write_user()
186 	status = copy_from_user(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write_user()
189 	rbuf->pwrite = (rbuf->pwrite + todo) % rbuf->size;  in dvb_ringbuffer_write_user()
197 	ssize_t oldpwrite = rbuf->pwrite;  in dvb_ringbuffer_pkt_write()
204 	if (status < 0) rbuf->pwrite = oldpwrite;  in dvb_ringbuffer_pkt_write()