Manual Pages for UNIX Operating System command usage for man ddi_in_panic

Kernel Functions for Drivers                     ddi_in_panic(9F)



NAME
     ddi_in_panic - determine if system is in panic state

SYNOPSIS
     #include 
     #include 



     int ddi_in_panic(void);


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI).

DESCRIPTION
     Drivers controlling devices on which the system may write  a
     kernel  crash  dump  in  the  event  of  a  panic  can  call
     ddi_in_panic() to determine if the system is panicking.


     When  the  system  is  panicking,  the  calls  of  functions
     scheduled  by  timeout(9F) and ddi_trigger_softintr(9F) will
     never occur. Neither can  delay(9F) be relied upon, since it
     is implemented via  timeout(9F).


     Drivers that need to enforce a time delay such as  SCSI  bus
     reset  delay  time must busy-wait when the system is panick-
     ing.

RETURN VALUES
     ddi_in_panic() returns  1 if the system is in panic,  or   0
     otherwise.

CONTEXT
     ddi_in_panic() may be called from any context.

SEE ALSO
     dump(9E), delay(9F), ddi_trigger_softintr(9F), timeout(9F)


     Writing Device Drivers












SunOS 5.11          Last change: 23 Jun 1997                    1