mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set sw=2 ts=8 et ft=cpp : */
|
|
/* ***** 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 Code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* The Mozilla Foundation
|
|
* Portions created by the Initial Developer are Copyright (C) 2011
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Justin Lebar <justin.lebar@gmail.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either 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 ***** */
|
|
|
|
#ifndef mozilla_ClearOnShutdown_h
|
|
#define mozilla_ClearOnShutdown_h
|
|
|
|
#include "mozilla/LinkedList.h"
|
|
|
|
/*
|
|
* This header exports one public method in the mozilla namespace:
|
|
*
|
|
* template<class SmartPtr>
|
|
* void ClearOnShutdown(SmartPtr *aPtr)
|
|
*
|
|
* This function takes a pointer to a smart pointer (i.e., nsCOMPtr<T>*,
|
|
* nsRefPtr<T>*, or nsAutoPtr<T>*) and nulls the smart pointer on shutdown.
|
|
*
|
|
* This is useful if you have a global smart pointer object which you don't
|
|
* want to "leak" on shutdown.
|
|
*
|
|
* There is no way to undo a call to ClearOnShutdown, so you can call it only
|
|
* on smart pointers which you know will live until the program shuts down.
|
|
*/
|
|
|
|
namespace mozilla {
|
|
namespace ClearOnShutdown_Internal {
|
|
|
|
class ShutdownObserver : public LinkedListElement<ShutdownObserver>
|
|
{
|
|
public:
|
|
virtual void Shutdown() = 0;
|
|
};
|
|
|
|
template<class SmartPtr>
|
|
class PointerClearer : public ShutdownObserver
|
|
{
|
|
public:
|
|
PointerClearer(SmartPtr *aPtr)
|
|
: mPtr(aPtr)
|
|
{}
|
|
|
|
virtual void Shutdown()
|
|
{
|
|
if (mPtr) {
|
|
*mPtr = NULL;
|
|
}
|
|
}
|
|
|
|
private:
|
|
SmartPtr *mPtr;
|
|
};
|
|
|
|
extern bool sHasShutDown;
|
|
extern LinkedList<ShutdownObserver> sShutdownObservers;
|
|
|
|
} // namespace ClearOnShutdown_Internal
|
|
|
|
template<class SmartPtr>
|
|
inline void ClearOnShutdown(SmartPtr *aPtr)
|
|
{
|
|
using namespace ClearOnShutdown_Internal;
|
|
|
|
MOZ_ASSERT(!sHasShutDown);
|
|
ShutdownObserver *observer = new PointerClearer<SmartPtr>(aPtr);
|
|
sShutdownObservers.insertBack(observer);
|
|
}
|
|
|
|
// Called when XPCOM is shutting down, after all shutdown notifications have
|
|
// been sent and after all threads' event loops have been purged.
|
|
inline void KillClearOnShutdown()
|
|
{
|
|
using namespace ClearOnShutdown_Internal;
|
|
|
|
ShutdownObserver *observer;
|
|
while ((observer = sShutdownObservers.popFirst())) {
|
|
observer->Shutdown();
|
|
delete observer;
|
|
}
|
|
|
|
sHasShutDown = true;
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|