Copyright 1989 AT&T
Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved
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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.
The RD() function can be called from user, interrupt, or kernel context.
Example 1 Function page reference
See the qreply(9F) function page for an example of RD().
Writing Device Drivers
STREAMS Programming Guide