Kernel Functions for Drivers                         esbbcall(9F)



NAME
     esbbcall - call function when buffer is available

SYNOPSIS
     #include 



     bufcallidt esbbcall(uintt pri, void (*func)(void *arg),
          void(arg));


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

PARAMETERS
     pri     Priority  of  allocation  request  (to  be  used  by
             allocb(9F) function, called by esbbcall()).


     func    Function to be called when buffer becomes available.


     arg     Argument to func.


DESCRIPTION
     The esbbcall()  function,  like  bufcall(9F),  serves  as  a
     timeout(9F) call of indeterminate length. If esballoc(9F) is
     unable to allocate a message and data  block  header  to  go
     with  its externally supplied data buffer, esbbcall() can be
     used to schedule the routine func, to  be  called  with  the
     argument arg when a buffer becomes available. The func argu-
     ment can be a routine that calls esballoc(9F) or it  may  be
     another kernel function.

RETURN VALUES
     On success, a  bufcall  IDis  returned.  On  failure,  0  is
     returned.  The  value returned from a successful call should
     be saved for possible future use with unbufcall() should  it
     become  necessary  to  cancel  the esbbcall() request (as at
     driver close time).

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

SEE ALSO
     allocb(9F),    bufcall(9F),    esballoc(9F),    timeout(9F),
     datab(9S), unbufcall(9F)





SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                         esbbcall(9F)



     Writing Device Drivers STREAMS Programming Guide






















































SunOS 5.11          Last change: 16 Jan 2006                    2