개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

qtimeout(9f)

qtimeout(9F)                   Kernel Functions                   qtimeout(9F)



NAME
       qtimeout - execute a function after a specified length of time

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

       timeout_id_t qtimeout(queue_t *q, void (*func)(void *),
            void *arg, clock_t ticks);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI).

PARAMETERS
       q        Pointer to STREAMS queue structure.


       func     Kernel function to invoke when the time increment expires.


       arg      Argument to the function.


       ticks    Number  of  clock ticks to wait before the function is called.
                Use drv_usectohz(9F) to convert microseconds to clock ticks.


DESCRIPTION
       The qtimeout() function schedules the specified  function  func  to  be
       called  after  a  specified time interval. func is called with arg as a
       parameter. Control is immediately returned to the caller. This is  use‐
       ful  when  an  event is known to occur within a specific time frame, or
       when you want to wait for I/O processes when an interrupt is not avail‐
       able  or  might  cause problems. The exact time interval over which the
       timeout takes effect cannot be guaranteed, but the  value  given  is  a
       close approximation.


       The  qtimeout()  function  is  tailored  to  be  used with the enhanced
       STREAMS framework interface which is based on the  concept  of  perime‐
       ters. (See mt-streams(9F).) qtimeout() schedules the specified function
       to execute after entering the  perimeters  associated  with  the  queue
       passed  in  as the first parameter to qtimeout(). All outstanding time‐
       outs and bufcalls must  be  cancelled  (using,  respectively,  quntime‐
       out(9F) and qunbufcall(9F)) before a driver close routine can block and
       before the close routine calls qprocsoff(9F).


       The qprocson(9F) function must be called before calling qtimeout().

RETURN VALUES
       The qtimeout() function returns an opaque non-zero  timeout  identifier
       that  can  be  passed to quntimeout(9F) to cancel the request. Note: No
       value is returned from the called function.

CONTEXT
       The qtimeout() function can be called from user, interrupt,  or  kernel
       context.

SEE ALSO
       drv_usectohz(9F),  mt-streams(9F),  qbufcall(9F), qprocson(9F), qunbuf‐
       call(9F), quntimeout(9F)


       Writing Device Drivers in Oracle Solaris 11.4


       STREAMS Programming Guide



Oracle Solaris 11.4               16 Jan 2006                     qtimeout(9F)