Current File : //usr/share/man/man3mpapi/MP_RegisterForObjectPropertyChanges.3mpapi

'\" te
.\" Copyright (c) 2004-2006 Storage Networking Industry Association. All Rights Reserved.
.\" Portions Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved.
.TH MP_RegisterForObjectPropertyChanges 3MPAPI "15 Feb 2006" "SunOS 5.11" "Common Multipath Management Library Functions"
.SH NAME
MP_RegisterForObjectPropertyChanges \- 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_RegisterForObjectPropertyChanges\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_PROPERTY_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_RegisterForObjectPropertyChanges()\fR function registers a client function to be called whenever the property of an object changes.
.sp
.LP
The function specified by \fIpClientFn\fR is called whenever the property of an object         changes. For the purposes of this function, a property is defined to be a field in an object's property structure and the object's status. Therefore, the client function is not called if a statistic of the associated object changes. But, it is called when the status changes (e.g., from working to failed) or when a name or other field in a property structure changes.
.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.
.sp
.LP
If multiple properties of an object change simultaneously, a client function can be called only once to be notified that all the changes have occurred.
.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 StabilityCommitted
_
MT-LevelSafe
_
StandardANSI INCITS 412 Multipath Management API
.TE

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