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114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Places code.
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*
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* The Initial Developer of the Original Code is
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* Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Ryner <bryner@brianryner.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsMaybeWeakPtr.h"
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void*
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nsMaybeWeakPtr_base::GetValueAs(const nsIID &iid) const
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{
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nsresult rv;
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void *ref;
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if (mPtr) {
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rv = mPtr->QueryInterface(iid, &ref);
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if (NS_SUCCEEDED(rv)) {
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return ref;
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}
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}
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nsCOMPtr<nsIWeakReference> weakRef = do_QueryInterface(mPtr);
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if (weakRef) {
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rv = weakRef->QueryReferent(iid, &ref);
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if (NS_SUCCEEDED(rv)) {
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return ref;
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}
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}
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return nsnull;
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}
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nsresult
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NS_AppendWeakElementBase(isupports_array_type *aArray,
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nsISupports *aElement,
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bool aOwnsWeak)
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{
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nsCOMPtr<nsISupports> ref;
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if (aOwnsWeak) {
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nsCOMPtr<nsIWeakReference> weakRef;
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weakRef = do_GetWeakReference(aElement);
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reinterpret_cast<nsCOMPtr<nsISupports>*>(&weakRef)->swap(ref);
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} else {
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ref = aElement;
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}
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if (aArray->IndexOf(ref) != aArray->NoIndex) {
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return NS_ERROR_INVALID_ARG; // already present
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}
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if (!aArray->AppendElement(ref)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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NS_RemoveWeakElementBase(isupports_array_type *aArray,
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nsISupports *aElement)
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{
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PRUint32 index = aArray->IndexOf(aElement);
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if (index != aArray->NoIndex) {
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aArray->RemoveElementAt(index);
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return NS_OK;
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}
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// Don't use do_GetWeakReference; it should only be called if we know
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// the object supports weak references.
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nsCOMPtr<nsISupportsWeakReference> supWeakRef = do_QueryInterface(aElement);
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NS_ENSURE_TRUE(supWeakRef, NS_ERROR_INVALID_ARG);
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nsCOMPtr<nsIWeakReference> weakRef;
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nsresult rv = supWeakRef->GetWeakReference(getter_AddRefs(weakRef));
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NS_ENSURE_SUCCESS(rv, rv);
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index = aArray->IndexOf(weakRef);
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if (index == aArray->NoIndex) {
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return NS_ERROR_INVALID_ARG;
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}
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aArray->RemoveElementAt(index);
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return NS_OK;
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}
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