xpcom/glue/nsCOMPtr.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   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 mozilla.org code.
  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  *   Scott Collins <scc@netscape.com>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either of the GNU General Public License Version 2 or later (the "GPL"),
  27  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
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  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsCOMPtr.h"
  40
  41 nsresult
  42 nsQueryInterface::operator()( const nsIID& aIID, void** answer ) const
  43         {
  44                 nsresult status;
  45                 if ( mRawPtr )
  46                         {
  47                                 status = mRawPtr->QueryInterface(aIID, answer);
  48 #ifdef NSCAP_FEATURE_TEST_NONNULL_QUERY_SUCCEEDS
  49                                 NS_ASSERTION(NS_SUCCEEDED(status), "interface not found---were you expecting that?");
  50 #endif
  51                         }
  52                 else
  53                         status = NS_ERROR_NULL_POINTER;
  54
  55                 return status;
  56         }
  57
  58 nsresult
  59 nsQueryInterfaceWithError::operator()( const nsIID& aIID, void** answer ) const
  60         {
  61                 nsresult status;
  62                 if ( mRawPtr )
  63                         {
  64                                 status = mRawPtr->QueryInterface(aIID, answer);
  65 #ifdef NSCAP_FEATURE_TEST_NONNULL_QUERY_SUCCEEDS
  66                                 NS_ASSERTION(NS_SUCCEEDED(status), "interface not found---were you expecting that?");
  67 #endif
  68                         }
  69                 else
  70                         status = NS_ERROR_NULL_POINTER;
  71
  72                 if ( mErrorPtr )
  73                         *mErrorPtr = status;
  74                 return status;
  75         }
  76
  77 nsCOMPtr_base::~nsCOMPtr_base()
  78         {
  79           NSCAP_LOG_RELEASE(this, mRawPtr);
  80                 if ( mRawPtr )
  81                         NSCAP_RELEASE(this, mRawPtr);
  82         }
  83
  84 void
  85 nsCOMPtr_base::assign_with_AddRef( nsISupports* rawPtr )
  86         {
  87     if ( rawPtr )
  88         NSCAP_ADDREF(this, rawPtr);
  89     assign_assuming_AddRef(rawPtr);
  90         }
  91
  92 void
  93 nsCOMPtr_base::assign_from_qi( const nsQueryInterface qi, const nsIID& iid )
  94   {
  95     void* newRawPtr;
  96     if ( NS_FAILED( qi(iid, &newRawPtr) ) )
  97       newRawPtr = 0;
  98     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
  99   }
 100
 101 void
 102 nsCOMPtr_base::assign_from_qi_with_error( const nsQueryInterfaceWithError& qi, const nsIID& iid )
 103   {
 104     void* newRawPtr;
 105     if ( NS_FAILED( qi(iid, &newRawPtr) ) )
 106       newRawPtr = 0;
 107     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 108   }
 109
 110 void
 111 nsCOMPtr_base::assign_from_gs_cid( const nsGetServiceByCID gs, const nsIID& iid )
 112   {
 113     void* newRawPtr;
 114     if ( NS_FAILED( gs(iid, &newRawPtr) ) )
 115       newRawPtr = 0;
 116     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 117   }
 118
 119 void
 120 nsCOMPtr_base::assign_from_gs_cid_with_error( const nsGetServiceByCIDWithError& gs, const nsIID& iid )
 121   {
 122     void* newRawPtr;
 123     if ( NS_FAILED( gs(iid, &newRawPtr) ) )
 124       newRawPtr = 0;
 125     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 126   }
 127
 128 void
 129 nsCOMPtr_base::assign_from_gs_contractid( const nsGetServiceByContractID gs, const nsIID& iid )
 130   {
 131     void* newRawPtr;
 132     if ( NS_FAILED( gs(iid, &newRawPtr) ) )
 133       newRawPtr = 0;
 134     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 135   }
 136
 137 void
 138 nsCOMPtr_base::assign_from_gs_contractid_with_error( const nsGetServiceByContractIDWithError& gs, const nsIID& iid )
 139   {
 140     void* newRawPtr;
 141     if ( NS_FAILED( gs(iid, &newRawPtr) ) )
 142       newRawPtr = 0;
 143     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 144   }
 145
 146 void
 147 nsCOMPtr_base::assign_from_helper( const nsCOMPtr_helper& helper, const nsIID& iid )
 148   {
 149     void* newRawPtr;
 150     if ( NS_FAILED( helper(iid, &newRawPtr) ) )
 151       newRawPtr = 0;
 152     assign_assuming_AddRef(static_cast<nsISupports*>(newRawPtr));
 153   }
 154
 155 void**
 156 nsCOMPtr_base::begin_assignment()
 157   {
 158     assign_assuming_AddRef(0);
 159     return reinterpret_cast<void**>(&mRawPtr);
 160   }