Sun Microsystems EDT S16A User Manual

Input and Output

S16A User’s Guide

20

EDT, Inc.  October, 1996

Stops DMA transfer after the current buffer has completed, whether DMA is occurring continuously or
noncontinuously. If DMA is continuous, also dismantles ring buffer mode and frees the resources it
consumed.

int s16a_stop_buffers(S16aDev *s16a_p);

S16A device handle returned from s16a_open

0 on success; –1 on error. If an error occurs, check the errno global variable for the error number.

Blocks until the specified buffer is returned from the driver.

void *s16a_wait_buffers(S16aDev *s16a_p, int bufnum);

S16A device handle returned from s16a_open

buffer number for which to block. Completed buffers are numbered cumulatively starting
with 0 when the S16A is opened. (Thus, the allocated buffer number is the transferred
buffer number modulo the number of allocated buffers.)

Address of last completed buffer on success; NULL on error. If an error occurs, check the errno global
variable for more information.