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qprocsoff(9f)

qprocson(9F)                   Kernel Functions                   qprocson(9F)

NAME
       qprocson, qprocsoff - enable, disable put and service routines

SYNOPSIS
       #include <sys/stream.h>
       #include <sys/ddi.h>

       void qprocson(queue_t *q);


       void qprocsoff(queue_t *q);

INTERFACE LEVEL
       Architecture independent level 1 (DDI/DKI).

PARAMETERS
       q    Pointer to the RD side of a streams queue pair.


DESCRIPTION
       The  qprocson()  enables  the put and service routines of the driver or
       module whose read queue is pointed to by q. Threads  cannot  enter  the
       module  instance  through  the  put and service routines while they are
       disabled.


       The qprocson() function must be called by the open routine of a  driver
       or  module before returning, and after any initialization necessary for
       the proper functioning of the put and service routines.


       The qprocson() function must be called  before  calling  put(9F),  put‐
       next(9F), qbufcall(9F), qtimeout(9F), qwait(9F), or qwait_sig(9F).


       The  qprocsoff() function must be called by the close routine of a dri‐
       ver or module before returning, and before deallocating  any  resources
       necessary  for  the proper functioning of the put and service routines.
       It also removes the queue's service routines from  the  service  queue,
       and blocks until any pending service processing completes.


       The  module  or driver instance is guaranteed to be single-threaded be‐
       fore qprocson() is called and after qprocsoff() is called,  except  for
       threads  executing  asynchronous  events such as interrupt handlers and
       callbacks, which must be handled separately.

CONTEXT
       These routines can be called from user, interrupt, or kernel context.

SEE ALSO
       qbufcall(9F), close(9E),  open(9E),  put(9E),  srv(9E),  put(9F),  put‐
       next(9F), qtimeout(9F), qwait(9F), qwait_sig(9F)


       Writing Device Drivers in Oracle Solaris 11.4


       STREAMS Programming Guide

NOTES
       The caller may not have the stream frozen during either of these calls.

Oracle Solaris 11.4               16 Jan 2006                     qprocson(9F)
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