unbufcall(9f)

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

6       unbufcall - cancel a pending bufcall request
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SYNOPSIS

9       #include <sys/stream.h>
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13       void unbufcall(bufcall_id_t id);
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INTERFACE LEVEL

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

20       id    Identifier returned from bufcall(9F) or esbbcall(9F).
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DESCRIPTION

24       The  unbufcall  function  cancels  a  pending  bufcall()  or esbbcall()
25       request. The argument id is a non-zero identifier for the request to be
26       cancelled.  id  is  returned  from the bufcall() or esbbcall() function
27       used to issue the request. unbufcall() will not return until the  pend‐
28       ing  callback  is cancelled or has run. Because of this, locks acquired
29       by the callback routine should not be held across the  call  to  unbuf‐
30       call() or deadlock may result.
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RETURN VALUES

33       None.
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CONTEXT

36       The  unbufcall  function  can be called from user, interrupt, or kernel
37       context.
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