Current File : //usr/share/man/man9f/ddi_in_panic.9f

'\" te
.\" Copyright (c) 2000, Sun Microsystems, Inc. All Rights Reserved
.TH ddi_in_panic 9F "23 Jun 1997" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
ddi_in_panic \- determine if system is in panic state
.SH SYNOPSIS
.LP
.nf
#include <sys/ddi.h>
#include <sys/sunddi.h>

\fBint\fR \fBddi_in_panic\fR(\fBvoid\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Solaris DDI specific (Solaris DDI).
.SH DESCRIPTION
.sp
.LP
Drivers controlling devices on which the system may write a kernel crash dump in the event of a panic can call \fBddi_in_panic()\fR to determine if the system is panicking. 
.sp
.LP
When the system is panicking, the calls of functions scheduled by \fBtimeout\fR(9F) and \fBddi_trigger_softintr\fR(9F) will never occur. Neither can  \fBdelay\fR(9F) be relied upon, since it is implemented via  \fBtimeout\fR(9F). 
.sp
.LP
Drivers that need to enforce a time delay such as  \fBSCSI \fRbus reset delay time must busy-wait when the system is panicking.
.SH RETURN VALUES
.sp
.LP
\fBddi_in_panic()\fR returns  \fB1\fR if the system is in panic,  or   \fB0\fR otherwise.
.SH CONTEXT
.sp
.LP
\fBddi_in_panic()\fR may be called from any context.
.SH SEE ALSO
.sp
.LP
\fBdump\fR(9E), \fBdelay\fR(9F), \fBddi_trigger_softintr\fR(9F), \fBtimeout\fR(9F) 
.sp
.LP
\fIWriting Device Drivers for Oracle Solaris 11.2\fR