зеркало из https://github.com/mozilla/pjs.git
193 строки
6.3 KiB
C++
193 строки
6.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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 the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Pierre Phaneuf <pp@ludusdesign.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "prlog.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsIFactory.h"
|
|
#include "nsIServiceManager.h"
|
|
#include "nsIComponentManager.h"
|
|
#include "nsIObserverService.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsISimpleEnumerator.h"
|
|
#include "nsObserverService.h"
|
|
#include "nsObserverList.h"
|
|
#include "nsHashtable.h"
|
|
#include "nsThreadUtils.h"
|
|
#include "nsIWeakReference.h"
|
|
#include "nsEnumeratorUtils.h"
|
|
|
|
#define NOTIFY_GLOBAL_OBSERVERS
|
|
|
|
#if defined(PR_LOGGING)
|
|
// Log module for nsObserverService logging...
|
|
//
|
|
// To enable logging (see prlog.h for full details):
|
|
//
|
|
// set NSPR_LOG_MODULES=ObserverService:5
|
|
// set NSPR_LOG_FILE=nspr.log
|
|
//
|
|
// this enables PR_LOG_DEBUG level information and places all output in
|
|
// the file nspr.log
|
|
PRLogModuleInfo* observerServiceLog = PR_NewLogModule("ObserverService");
|
|
#define LOG(x) PR_LOG(observerServiceLog, PR_LOG_DEBUG, x)
|
|
#else
|
|
#define LOG(x)
|
|
#endif /* PR_LOGGING */
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsObserverService Implementation
|
|
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS2(nsObserverService, nsIObserverService, nsObserverService)
|
|
|
|
nsObserverService::nsObserverService() :
|
|
mShuttingDown(false)
|
|
{
|
|
mObserverTopicTable.Init();
|
|
}
|
|
|
|
nsObserverService::~nsObserverService(void)
|
|
{
|
|
Shutdown();
|
|
}
|
|
|
|
void
|
|
nsObserverService::Shutdown()
|
|
{
|
|
mShuttingDown = true;
|
|
|
|
if (mObserverTopicTable.IsInitialized())
|
|
mObserverTopicTable.Clear();
|
|
}
|
|
|
|
nsresult
|
|
nsObserverService::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
|
|
{
|
|
LOG(("nsObserverService::Create()"));
|
|
|
|
nsRefPtr<nsObserverService> os = new nsObserverService();
|
|
|
|
if (!os || !os->mObserverTopicTable.IsInitialized())
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return os->QueryInterface(aIID, aInstancePtr);
|
|
}
|
|
|
|
#define NS_ENSURE_VALIDCALL \
|
|
if (!NS_IsMainThread()) { \
|
|
NS_ERROR("Using observer service off the main thread!"); \
|
|
return NS_ERROR_UNEXPECTED; \
|
|
} \
|
|
if (mShuttingDown) { \
|
|
NS_ERROR("Using observer service after XPCOM shutdown!"); \
|
|
return NS_ERROR_ILLEGAL_DURING_SHUTDOWN; \
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsObserverService::AddObserver(nsIObserver* anObserver, const char* aTopic,
|
|
bool ownsWeak)
|
|
{
|
|
LOG(("nsObserverService::AddObserver(%p: %s)",
|
|
(void*) anObserver, aTopic));
|
|
|
|
NS_ENSURE_VALIDCALL
|
|
NS_ENSURE_ARG(anObserver && aTopic);
|
|
|
|
nsObserverList *observerList = mObserverTopicTable.PutEntry(aTopic);
|
|
if (!observerList)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return observerList->AddObserver(anObserver, ownsWeak);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsObserverService::RemoveObserver(nsIObserver* anObserver, const char* aTopic)
|
|
{
|
|
LOG(("nsObserverService::RemoveObserver(%p: %s)",
|
|
(void*) anObserver, aTopic));
|
|
NS_ENSURE_VALIDCALL
|
|
NS_ENSURE_ARG(anObserver && aTopic);
|
|
|
|
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
|
|
if (!observerList)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
/* This death grip is to protect against stupid consumers who call
|
|
RemoveObserver from their Destructor, see bug 485834/bug 325392. */
|
|
nsCOMPtr<nsIObserver> kungFuDeathGrip(anObserver);
|
|
return observerList->RemoveObserver(anObserver);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsObserverService::EnumerateObservers(const char* aTopic,
|
|
nsISimpleEnumerator** anEnumerator)
|
|
{
|
|
NS_ENSURE_VALIDCALL
|
|
NS_ENSURE_ARG(aTopic && anEnumerator);
|
|
|
|
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
|
|
if (!observerList)
|
|
return NS_NewEmptyEnumerator(anEnumerator);
|
|
|
|
return observerList->GetObserverList(anEnumerator);
|
|
}
|
|
|
|
// Enumerate observers of aTopic and call Observe on each.
|
|
NS_IMETHODIMP nsObserverService::NotifyObservers(nsISupports *aSubject,
|
|
const char *aTopic,
|
|
const PRUnichar *someData)
|
|
{
|
|
LOG(("nsObserverService::NotifyObservers(%s)", aTopic));
|
|
|
|
NS_ENSURE_VALIDCALL
|
|
NS_ENSURE_ARG(aTopic);
|
|
|
|
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
|
|
if (observerList)
|
|
observerList->NotifyObservers(aSubject, aTopic, someData);
|
|
|
|
#ifdef NOTIFY_GLOBAL_OBSERVERS
|
|
observerList = mObserverTopicTable.GetEntry("*");
|
|
if (observerList)
|
|
observerList->NotifyObservers(aSubject, aTopic, someData);
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|