1RD(9F)                   Kernel Functions for Drivers                   RD(9F)
2
3
4

NAME

6       RD, rd - get pointer to the read queue
7

SYNOPSIS

9       #include <sys/stream.h>
10       #include <sys/ddi.h>
11
12
13
14       queue_t *RD(queue_t *q);
15
16

INTERFACE LEVEL

18       Architecture independent level 1 (DDI/DKI).
19

PARAMETERS

21       q    Pointer to the write queue whose read queue is to be returned.
22
23

DESCRIPTION

25       The  RD()  function  accepts  a  write queue pointer as an argument and
26       returns a pointer to the read queue of the same module.
27
28
29       CAUTION: Make sure the argument to this function  is  a  pointer  to  a
30       write  queue.  RD()  will  not check for queue type, and a system panic
31       could result if it is not the right type.
32

RETURN VALUES

34       The pointer to the read queue.
35

CONTEXT

37       The RD() function can be called from user, interrupt,  or  kernel  con‐
38       text.
39

EXAMPLES

41       Example 1 Function page reference
42
43
44       See the qreply(9F) function page for an example of RD().
45
46

SEE ALSO

48       qreply(9F), WR(9F)
49
50
51       Writing Device Drivers
52
53
54       STREAMS Programming Guide
55
56
57
58SunOS 5.11                        16 Jan 2006                           RD(9F)