'\" te
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.\" Portions Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved.
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.TH MP_RegisterForObjectVisibilityChanges 3MPAPI "15 Feb 2006" "SunOS 5.11" "Common Multipath Management Library Functions"
.SH NAME
MP_RegisterForObjectVisibilityChanges \- register a client function to be
called
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-lMPAPI\fR [ \fIlibrary\fR\&.\|.\|. ]
#include <mpapi.h>

\fBMP_STATUS\fR \fBMP_RegisterForObjectVisibilityChanges\fR(
     \fBMP_OBJECT_PROPERTY_FN\fR \fIpClientFn\fR, \fBMP_OBJECT_TYPE\fR \fIobjectType\fR,
     \fBvoid\fR \fI*pCallerData\fR, \fBMP_OID\fR \fIpluginOid\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIpClientFn\fR\fR
.ad
.RS 15n
.rt  
A pointer to an object ID that has type \fBMP_OBJECT_VISIBILITY_FN\fR function
defined by the client. With a  successful return, this function is called to
inform the client of objects that have had one or more properties changed.
.RE

.sp
.ne 2
.mk
.na
\fB\fIobjectType\fR\fR
.ad
.RS 15n
.rt  
The type of object the client wishes to register for property change callbacks.
.RE

.sp
.ne 2
.mk
.na
\fB\fIpCallerData\fR\fR
.ad
.RS 15n
.rt  
A pointer that is passed to the callback routine with each event. This might be
used by the caller to correlate the event to the source of the registration.
.RE

.sp
.ne 2
.mk
.na
\fB\fIpluginOid\fR\fR
.ad
.RS 15n
.rt  
If this is a valid plugin object ID, then registration is limited to that
plugin. If this is zero, then the registration is for all plugins.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBMP_RegisterForObjectVisibilityChanges()\fR function registers a client
function to be called whenever the property of an object changes. The function
specified by \fIpClientFn\fR is called whenever objects appear or disappear.
.sp
.LP
It is not an error to re-register a client function. However, a client function
has only one registration. The first call to deregister a client function will
deregister it no matter how many calls to register the function have been made.
.SH RETURN VALUES
.sp
.ne 2
.mk
.na
\fB\fBMP_STATUS_INVALID_OBJECT_TYPE\fR\fR
.ad
.sp .6
.RS 4n
The \fIpluginOid\fR or \fIobjectType\fR does not specify any valid object type.
This is most likely to happen if an uninitialized object ID is passed to the
API.
.RE

.sp
.ne 2
.mk
.na
\fB\fBMP_STATUS_OBJECT_NOT_FOUND\fR\fR
.ad
.sp .6
.RS 4n
The \fIpluginOid\fR owner ID or object sequence number is invalid.
.RE

.sp
.ne 2
.mk
.na
\fB\fBMP_STATUS_INVALID_PARAMETER\fR\fR
.ad
.sp .6
.RS 4n
The \fIpCallerData\fR is null or if the \fIpluginOid\fR has a type subfield
other than \fBMP_OBJECT_TYPE_PLUGIN\fR, or when \fIobjectType\fR is invalid.
.RE

.sp
.ne 2
.mk
.na
\fB\fBMP_STATUS_SUCCESS\fR\fR
.ad
.sp .6
.RS 4n
The operation is successful.
.RE

.sp
.ne 2
.mk
.na
\fB\fBMP_STATUS_FN_REPLACED\fR\fR
.ad
.sp .6
.RS 4n
An existing client function is replaced with the one specified in
\fIpClientFn\fR.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityT{
Standard: ANSI INCITS 412 Multipath Management API
T}
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBlibMPAPI\fR(3LIB), \fBMP_DeregisterForObjectVisibilityChanges\fR(3MPAPI),
\fBattributes\fR(5)
.sp
.LP
\fIMultipath Management API Version 1.0\fR