putctl1(9f) - osol9

1putctl1(9F)              Kernel Functions for Drivers              putctl1(9F)
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NAME

6       putctl1 - send a control message with a one-byte parameter to a queue
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SYNOPSIS

9       #include <sys/stream.h>
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13       int putctl1(queue_t *q, int type, int p);
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INTERFACE LEVEL

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

20       q       Queue to which the message is to be sent.
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23       type    Type of message.
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26       p       One-byte parameter.
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DESCRIPTION

30       The  putctl1()  function,  like  putctl(9F), tests the type argument to
31       make sure a data type has not been specified, and attempts to  allocate
32       a  message  block. The p parameter can be used, for example, to specify
33       how long the delay will be when  an  M_DELAY  message  is  being  sent.
34       putctl1()  fails if type is M_DATA, M_PROTO, or M_PCPROTO, or if a mes‐
35       sage block cannot be allocated.  If  successful,  putctl1()  calls  the
36       put(9E)  routine  of the queue pointed to by q with the newly allocated
37       and initialized message.
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RETURN VALUES

40       On success, 1 is returned. 0 is returned if type is a data type, or  if
41       a message block cannot be allocated.
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CONTEXT

44       The  putctl1()  function  can be called from user, interrupt, or kernel
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EXAMPLES

48       See the putctl(9F) function page for an example of putctl1().
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