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/gecko_api/include/nsServiceManagerUtils.h

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C++ Header | 133 lines | 79 code | 16 blank | 38 comment | 0 complexity | 0416a659546a1a0b3088b96f00b21ff3 MD5 | raw file
  1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
  2/* ***** BEGIN LICENSE BLOCK *****
  3 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  4 *
  5 * The contents of this file are subject to the Mozilla Public License Version
  6 * 1.1 (the "License"); you may not use this file except in compliance with
  7 * the License. You may obtain a copy of the License at
  8 * http://www.mozilla.org/MPL/
  9 *
 10 * Software distributed under the License is distributed on an "AS IS" basis,
 11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 12 * for the specific language governing rights and limitations under the
 13 * License.
 14 *
 15 * The Original Code is XPCOM.
 16 *
 17 * The Initial Developer of the Original Code is
 18 * Netscape Communications Corporation.
 19 * Portions created by the Initial Developer are Copyright (C) 1998
 20 * the Initial Developer. All Rights Reserved.
 21 *
 22 * Contributor(s):
 23 *
 24 * Alternatively, the contents of this file may be used under the terms of
 25 * either of the GNU General Public License Version 2 or later (the "GPL"),
 26 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 27 * in which case the provisions of the GPL or the LGPL are applicable instead
 28 * of those above. If you wish to allow use of your version of this file only
 29 * under the terms of either the GPL or the LGPL, and not to allow others to
 30 * use your version of this file under the terms of the MPL, indicate your
 31 * decision by deleting the provisions above and replace them with the notice
 32 * and other provisions required by the GPL or the LGPL. If you do not delete
 33 * the provisions above, a recipient may use your version of this file under
 34 * the terms of any one of the MPL, the GPL or the LGPL.
 35 *
 36 * ***** END LICENSE BLOCK ***** */
 37
 38#ifndef nsServiceManagerUtils_h__
 39#define nsServiceManagerUtils_h__
 40
 41#include "nsIServiceManager.h"
 42#include "nsCOMPtr.h"
 43
 44inline
 45const nsGetServiceByCID
 46do_GetService(const nsCID& aCID)
 47{
 48    return nsGetServiceByCID(aCID);
 49}
 50
 51inline
 52const nsGetServiceByCIDWithError
 53do_GetService(const nsCID& aCID, nsresult* error)
 54{
 55    return nsGetServiceByCIDWithError(aCID, error);
 56}
 57
 58inline
 59const nsGetServiceByContractID
 60do_GetService(const char* aContractID)
 61{
 62    return nsGetServiceByContractID(aContractID);
 63}
 64
 65inline
 66const nsGetServiceByContractIDWithError
 67do_GetService( const char* aContractID, nsresult* error)
 68{
 69    return nsGetServiceByContractIDWithError(aContractID, error);
 70}
 71
 72class nsGetServiceFromCategory : public nsCOMPtr_helper
 73{
 74 public:
 75    nsGetServiceFromCategory(const char* aCategory, const char* aEntry,
 76                             nsresult* aErrorPtr)
 77        : mCategory(aCategory),
 78        mEntry(aEntry),
 79        mErrorPtr(aErrorPtr)
 80        {
 81            // nothing else to do
 82        }
 83    
 84    virtual nsresult NS_FASTCALL operator()( const nsIID&, void** ) const;
 85 protected:
 86    const char*                 mCategory;
 87    const char*                 mEntry;
 88    nsresult*                   mErrorPtr;
 89};
 90
 91inline
 92const nsGetServiceFromCategory
 93do_GetServiceFromCategory( const char* category, const char* entry,
 94                           nsresult* error = 0)
 95{
 96    return nsGetServiceFromCategory(category, entry, error);
 97}
 98
 99NS_COM_GLUE nsresult
100CallGetService(const nsCID &aClass, const nsIID &aIID, void **aResult);
101
102NS_COM_GLUE nsresult
103CallGetService(const char *aContractID, const nsIID &aIID, void **aResult);
104
105// type-safe shortcuts for calling |GetService|
106template <class DestinationType>
107inline
108nsresult
109CallGetService( const nsCID &aClass,
110                DestinationType** aDestination)
111{
112    NS_PRECONDITION(aDestination, "null parameter");
113    
114    return CallGetService(aClass,
115                          NS_GET_TEMPLATE_IID(DestinationType),
116                          reinterpret_cast<void**>(aDestination));
117}
118
119template <class DestinationType>
120inline
121nsresult
122CallGetService( const char *aContractID,
123                DestinationType** aDestination)
124{
125    NS_PRECONDITION(aContractID, "null parameter");
126    NS_PRECONDITION(aDestination, "null parameter");
127    
128    return CallGetService(aContractID,
129                          NS_GET_TEMPLATE_IID(DestinationType),
130                          reinterpret_cast<void**>(aDestination));
131}
132
133#endif