strqget(9f) - osol9

1strqget(9F)              Kernel Functions for Drivers              strqget(9F)
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NAME

6       strqget - get information about a queue or band of the queue
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SYNOPSIS

9       #include <sys/stream.h>
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13       int strqget(queue_t *q, qfields_t what, unsigned char pri, void *valp);
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INTERFACE LEVEL

17       Architecture independent level 1 (DDI/DKI).
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PARAMETERS

20       q       Pointer to the queue.
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23       what    Field  of  the  queue  structure for (or the specified priority
24               band) to return information about. Valid values are one of:
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26               QHIWAT     High water mark.
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29               QLOWAT     Low water mark.
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32               QMAXPSZ    Largest packet accepted.
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35               QMINPSZ    Smallest packet accepted.
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38               QCOUNT     Approximate size (in bytes) of data.
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41               QFIRST     First message.
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44               QLAST      Last message.
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47               QFLAG      Status.
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51       pri     Priority band of interest.
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54       valp    The address of where to store the value of the requested field.
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DESCRIPTION

58       The strqget() function gives drivers and modules a way to get  informa‐
59       tion  about  a  queue  or a particular band of a queue without directly
60       accessing STREAMS data structures, thus insulating them from changes in
61       the implementation of these data structures from release to release.
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RETURN VALUES

64       On  success,  0  is  returned  and  the value of the requested field is
65       stored in the location pointed to by valp. An error number is  returned
66       on failure.
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CONTEXT

69       The  strqget()  function  can be called from user, interrupt, or kernel
70       context.
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