ddi_in_panic(9F)

NAME

     ddi_in_panic - determine if system is in panic state

SYNOPSIS

     #include <sys/ddi.h>
     #include <sys/sunddi.h>

     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