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Kernel Functions for Drivers

RD(9F)

INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
EXAMPLES
SEE ALSO

NAME

RD, rd - get pointer to the read queue

SYNOPSIS

#include <sys/stream.h> #include <sys/ddi.h> queue_t *RD(queue_t *q);

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).

PARAMETERS

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

DESCRIPTION

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.

RETURN VALUES

The pointer to the read queue.

CONTEXT

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

EXAMPLES

Example 1. Function page reference

See the qreply(9F) function page for an example of RD().