gecko-dev/xpcom/glue/nsCOMPtr.cpp

80 lines
1.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Scott Collins <scc@netscape.com>
*/
#include "nsCOMPtr.h"
nsresult
nsQueryInterface::operator()( const nsIID& aIID, void** answer ) const
{
nsresult status;
if ( mRawPtr )
status = mRawPtr->QueryInterface(aIID, answer);
else
status = NS_ERROR_NULL_POINTER;
if ( mErrorPtr )
*mErrorPtr = status;
return status;
}
#ifdef NSCAP_FEATURE_FACTOR_DESTRUCTOR
nsCOMPtr_base::~nsCOMPtr_base()
{
if ( mRawPtr )
NSCAP_RELEASE(mRawPtr);
}
#endif
void
nsCOMPtr_base::assign_with_AddRef( nsISupports* rawPtr )
{
if ( rawPtr )
NSCAP_ADDREF(rawPtr);
if ( mRawPtr )
NSCAP_RELEASE(mRawPtr);
mRawPtr = rawPtr;
}
void
nsCOMPtr_base::assign_from_helper( const nsCOMPtr_helper& helper, const nsIID& iid )
{
nsISupports* newRawPtr;
if ( !NS_SUCCEEDED( helper(iid, NS_REINTERPRET_CAST(void**, &newRawPtr)) ) )
newRawPtr = 0;
if ( mRawPtr )
NSCAP_RELEASE(mRawPtr);
mRawPtr = newRawPtr;
}
void**
nsCOMPtr_base::begin_assignment()
{
if ( mRawPtr )
{
NSCAP_RELEASE(mRawPtr);
mRawPtr = 0;
}
return NS_REINTERPRET_CAST(void**, &mRawPtr);
}