1qband(9S)                 Data Structures for Drivers                qband(9S)
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NAME

6       qband - STREAMS queue flow control information structure
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SYNOPSIS

9       #include <sys/stream.h>
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INTERFACE LEVEL

13       Architecture independent level 1 (DDI/DKI)
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DESCRIPTION

16       The   qband structure contains flow control information for each prior‐
17       ity band in a queue.
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20       The qband structure is defined as type qband_t.
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STRUCTURE MEMBERS

23         struct        qband*qb_next;     /* next band's info */
24         size_t        qb_count           /* number of bytes in band */
25         struct msgb   *qb_first;         /* start of band's data */
26         struct msgb   *qb_last;          /* end of band's data */
27         size_t        qb_hiwat;          /* band's high water mark */
28         size_t        qb_lowat;          /* band's low water mark */
29         uint_t        qb_flag;           /* see below */
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33       Valid flags are as follows:
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35       QB_FULL      Band is considered full.
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38       QB_WANTW     Someone wants to write to band.
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SEE ALSO

42       strqget(9F), strqset(9F), msgb(9S), queue(9S)
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45       STREAMS Programming Guide
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NOTES

48       All  access  to  this  structure  should  be  through  strqget(9F)  and
49       strqset(9F).  It  is logically part of the queue(9S) and its layout and
50       partitioning with respect to that  structure  might  change  in  future
51       releases.  If  portability  is  a  concern,  do  not  declare  or store
52       instances of or references to this structure.
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56SunOS 5.11                        14 Nov 1996                        qband(9S)