Architecture independent level 1 (DDI/DKI).

q

Pointer to the write queue whose read queue is to be returned.

The RD() function accepts a write queue pointer as an argument and returns a pointer to the read queue of the same module.

CAUTION: Make sure the argument to this function is a pointer to a write queue. RD() will not check for queue type, and a system panic could result if it is not the right type.

The pointer to the read queue.

RD() can be called from user or interrupt context.

qreply(9F), WR(9F)

Writing Device Drivers

STREAMS Programming Guide