зеркало из https://github.com/mozilla/gecko-dev.git
81 строка
2.1 KiB
C++
81 строка
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 nullptr;
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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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size_t 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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