зеркало из https://github.com/mozilla/gecko-dev.git
138 строки
3.0 KiB
C++
138 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#define NS_IMPL_IDS
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#include "pratom.h"
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#include "nsIObserverList.h"
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#include "nsObserverList.h"
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#include "nsString.h"
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#include "nsAutoLock.h"
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#define NS_AUTOLOCK(__monitor) nsAutoLock __lock(__monitor)
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static NS_DEFINE_CID(kObserverListCID, NS_OBSERVERLIST_CID);
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////////////////////////////////////////////////////////////////////////////////
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// nsObserverList Implementation
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NS_IMPL_ISUPPORTS1(nsObserverList, nsIObserverList)
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NS_COM nsresult NS_NewObserverList(nsIObserverList** anObserverList)
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{
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if (anObserverList == NULL)
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{
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return NS_ERROR_NULL_POINTER;
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}
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nsObserverList* it = new nsObserverList();
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if (it == 0) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(NS_GET_IID(nsIObserverList), (void **) anObserverList);
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}
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nsObserverList::nsObserverList()
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: mLock(nsnull),
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mObserverList(NULL)
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{
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NS_INIT_REFCNT();
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mLock = PR_NewLock();
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}
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nsObserverList::~nsObserverList(void)
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{
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PR_DestroyLock(mLock);
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NS_IF_RELEASE(mObserverList);
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}
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nsresult nsObserverList::AddObserver(nsIObserver** anObserver)
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{
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nsresult rv;
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PRBool inserted;
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NS_AUTOLOCK(mLock);
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if (anObserver == NULL)
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{
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return NS_ERROR_NULL_POINTER;
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}
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if(!mObserverList) {
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rv = NS_NewISupportsArray(&mObserverList);
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if (NS_FAILED(rv)) return rv;
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}
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if(*anObserver) {
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inserted = mObserverList->AppendElement(*anObserver);
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return inserted ? NS_OK : NS_ERROR_FAILURE;
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}
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return NS_ERROR_FAILURE;
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}
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nsresult nsObserverList::RemoveObserver(nsIObserver** anObserver)
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{
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PRBool removed;
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NS_AUTOLOCK(mLock);
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if (anObserver == NULL)
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{
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return NS_ERROR_NULL_POINTER;
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}
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if(!mObserverList) {
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return NS_ERROR_FAILURE;
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}
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if(*anObserver) {
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removed = mObserverList->RemoveElement(*anObserver);
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return removed ? NS_OK : NS_ERROR_FAILURE;
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}
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP nsObserverList::EnumerateObserverList(nsIEnumerator** anEnumerator)
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{
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NS_AUTOLOCK(mLock);
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if (anEnumerator == NULL)
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{
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return NS_ERROR_NULL_POINTER;
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}
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if(!mObserverList) {
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return NS_ERROR_FAILURE;
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}
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return mObserverList->Enumerate(anEnumerator);
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}
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