otherq(9f) [mojave man page]
OTHERQ(9F) Kernel Functions for Drivers OTHERQ(9F) NAME OTHERQ, otherq - get pointer to queue's partner queue SYNOPSIS #include <sys/stream.h> #include <sys/ddi.h> queue_t *OTHERQ(queue_t *q); INTERFACE LEVEL Architecture independent level 1 (DDI/DKI). PARAMETERS q Pointer to the queue. DESCRIPTION The OTHERQ() function returns a pointer to the other of the two queue structures that make up a STREAMS module or driver. If q points to the read queue the write queue will be returned, and vice versa. RETURN VALUES OTHERQ() returns a pointer to a queue's partner. CONTEXT OTHERQ() can be called from user or interrupt context. EXAMPLES Example 1: Setting Queues This routine sets the minimum packet size, the maximum packet size, the high water mark, and the low water mark for the read and write queues of a given module or driver. It is passed either one of the queues. This could be used if a module or driver wished to update its queue parameters dynamically. 1 void 2 set_q_params(q, min, max, hi, lo) 3 queue_t *q; 4 short min; 5 short max; 6 ushort_t hi; 7 ushort_t lo; 8 { 9 q->q_minpsz = min; 10 q->q_maxpsz = max; 11 q->q_hiwat = hi; 12 q->q_lowat = lo; 13 OTHERQ(q)->q_minpsz = min; 14 OTHERQ(q)->q_maxpsz = max; 15 OTHERQ(q)->q_hiwat = hi; 16 OTHERQ(q)->q_lowat = lo; 17 } SEE ALSO Writing Device Drivers STREAMS Programming Guide SunOS 5.10 11 Apr 1991 OTHERQ(9F)
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OTHERQ(9F) Kernel Functions for Drivers OTHERQ(9F) NAME
OTHERQ, otherq - get pointer to queue's partner queue SYNOPSIS
#include <sys/stream.h> #include <sys/ddi.h> queue_t *OTHERQ(queue_t *q); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
q Pointer to the queue. DESCRIPTION
The OTHERQ() function returns a pointer to the other of the two queue structures that make up a STREAMS module or driver. If q points to the read queue the write queue will be returned, and vice versa. RETURN VALUES
OTHERQ() returns a pointer to a queue's partner. CONTEXT
OTHERQ() can be called from user or interrupt context. EXAMPLES
Example 1: Setting Queues This routine sets the minimum packet size, the maximum packet size, the high water mark, and the low water mark for the read and write queues of a given module or driver. It is passed either one of the queues. This could be used if a module or driver wished to update its queue parameters dynamically. 1 void 2 set_q_params(q, min, max, hi, lo) 3 queue_t *q; 4 short min; 5 short max; 6 ushort_t hi; 7 ushort_t lo; 8 { 9 q->q_minpsz = min; 10 q->q_maxpsz = max; 11 q->q_hiwat = hi; 12 q->q_lowat = lo; 13 OTHERQ(q)->q_minpsz = min; 14 OTHERQ(q)->q_maxpsz = max; 15 OTHERQ(q)->q_hiwat = hi; 16 OTHERQ(q)->q_lowat = lo; 17 } SEE ALSO
Writing Device Drivers STREAMS Programming Guide SunOS 5.10 11 Apr 1991 OTHERQ(9F)