/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include "mp_utils.h"


/*
 *      Called by the common layer to request the plugin to call
 *      a client application's callback (pClientFn) when a visibility change
 *      is detected for the given object type.
 */

MP_STATUS
MP_RegisterForObjectVisibilityChangesPlugin(MP_OBJECT_VISIBILITY_FN pClientFn,
                MP_OBJECT_TYPE objectType,
                void *pCallerData)
{
        MP_BOOL hasFunc = MP_FALSE;


        log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
            " - enter");


        /* Validate the object type passes in within range */
        if (objectType > MP_OBJECT_TYPE_MAX) {

                log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
                    " - objectType is invalid");

                log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
                    " - error exit");

                return (MP_STATUS_INVALID_PARAMETER);
        }

        if (objectType < 1) {

                log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
                    " - objectType is invalid");

                log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
                    " - error exit");

                return (MP_STATUS_INVALID_PARAMETER);
        }

        /* Init sysevents if they have not been initialized yet */
        if (g_SysEventHandle == NULL) {
                if (init_sysevents() != MP_STATUS_SUCCESS)
                        return (MP_STATUS_FAILED);
        }

        /* Check to see if we are going to be replacing */
        (void) pthread_mutex_lock(&g_visa_mutex);
        if (g_Visibility_Callback_List[objectType].pClientFn != NULL) {

                hasFunc = MP_TRUE;
        }

        /* Add the registration */
        g_Visibility_Callback_List[objectType].pClientFn   = pClientFn;
        g_Visibility_Callback_List[objectType].pCallerData = pCallerData;
        (void) pthread_mutex_unlock(&g_visa_mutex);

        if (hasFunc) {

                log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
                    " - returning MP_STATUS_FN_REPLACED");

                return (MP_STATUS_FN_REPLACED);
        }


        log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
            " - exit");

        return (MP_STATUS_SUCCESS);
}