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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is XPCOM.
 *
 * The Initial Developer of the Original Code is Netscape Communications.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */


#include "nsISupports.idl"

/**
 * The nsIServiceManager manager interface provides a means to obtain
 * global services in an application. The service manager depends on the 
 * repository to find and instantiate factories to obtain services.
 *
 * Users of the service manager must first obtain a pointer to the global
 * service manager by calling NS_GetServiceManager. After that, 
 * they can request specific services by calling GetService. When they are
 * finished they can NS_RELEASE() the service as usual.
 *
 * A user of a service may keep references to particular services indefinitely
 * and only must call Release when it shuts down.
 *
 * @status FROZEN
 */

[scriptable, uuid(8bb35ed9-e332-462d-9155-4a002ab5c958)]
interface nsIServiceManager : nsISupports
{
    /**
     * getServiceByContractID
     *
     * Returns the instance that implements aClass or aContractID and the
     * interface aIID.  This may result in the instance being created.
     *
     * @param aClass or aContractID : aClass or aContractID of object 
     *                                instance requested
     * @param aIID : IID of interface requested
     * @param result : resulting service 
     */
    void getService(in nsCIDRef aClass, 
		    in nsIIDRef aIID, 
		    [iid_is(aIID),retval] out nsQIResult result);

    void getServiceByContractID(in string aContractID,
				in nsIIDRef aIID, 
				[iid_is(aIID),retval] out nsQIResult result);

    /**
     * isServiceInstantiated
     *
     * isServiceInstantiated will return a true if the service has already
     * been created, otherwise false
     *
     * @param aClass or aContractID : aClass or aContractID of object 
     *                                instance requested
     * @param aIID : IID of interface requested
     * @param aIID : IID of interface requested
     */
    boolean isServiceInstantiated(in nsCIDRef aClass, in nsIIDRef aIID);
    boolean isServiceInstantiatedByContractID(in string aContractID, in nsIIDRef aIID);
};


%{C++
#define NS_ERROR_SERVICE_NOT_AVAILABLE  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_XPCOM, 22)
/**
 * @status DEPRECATED
 */
#define NS_ERROR_SERVICE_NOT_FOUND      NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_XPCOM, 22)
/**
 * @status DEPRECATED
 */
#define NS_ERROR_SERVICE_IN_USE         NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_XPCOM, 23)

// Observing xpcom autoregistration.  Topics will be 'start' and 'stop'.
#define NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID "xpcom-autoregistration"

#ifdef MOZILLA_INTERNAL_API
#include "nsXPCOM.h"
#include "nsServiceManagerUtils.h"
#include "nsIServiceManagerObsolete.h"
#endif
%}