void flushband(queue_t *q, unsigned char pri, int flag);
Architecture independent level 1 (DDI/DKI).
q Pointer to the queue.
pri Priority of messages to be flushed.
flag Valid flag values are:
FLUSHDATA Flush only data messages (types M_DATA, M_DELAY, M_PROTO, and M_PCPROTO ).
FLUSHALL Flush all messages.
The flushband() function flushes messages associated with the priority band specified by pri. If pri is 0, only normal and high priority messages are flushed. Otherwise, messages are flushed from the band pri according to the value of flag.
The flushband() function can be called from user, interrupt, or kernel context.
Writing Device Drivers STREAMS Programming Guide