зеркало из https://github.com/mozilla/gecko-dev.git
50 строки
2.0 KiB
C++
50 строки
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsUpdateSyncManager_h__
|
|
#define nsUpdateSyncManager_h__
|
|
|
|
#include "mozilla/AlreadyAddRefed.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsIUpdateService.h"
|
|
#include "MultiInstanceLock.h"
|
|
|
|
// The update sync manager is responsible for making sure that only one
|
|
// instance of the application is running at the time we want to start updating
|
|
// it. It does this by taking a multi-instance lock very early during the
|
|
// application's startup process. Then, when app update tasks are ready to run,
|
|
// the update service asks us whether anything else has also taken that lock,
|
|
// which, if true, would mean another instance of the application is currently
|
|
// running and performing update tasks should be avoided (the update service
|
|
// also runs a timeout and eventually goes ahead with the update in order to
|
|
// prevent an external program from effectively disabling updates).
|
|
class nsUpdateSyncManager final : public nsIUpdateSyncManager,
|
|
public nsIObserver {
|
|
public:
|
|
explicit nsUpdateSyncManager(nsIFile* anAppFile = nullptr);
|
|
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
NS_DECL_NSIUPDATESYNCMANAGER
|
|
NS_DECL_NSIOBSERVER
|
|
|
|
static already_AddRefed<nsUpdateSyncManager> GetSingleton();
|
|
|
|
private:
|
|
~nsUpdateSyncManager();
|
|
|
|
nsUpdateSyncManager(nsUpdateSyncManager&) = delete;
|
|
nsUpdateSyncManager(nsUpdateSyncManager&&) = delete;
|
|
nsUpdateSyncManager& operator=(nsUpdateSyncManager&) = delete;
|
|
nsUpdateSyncManager& operator=(nsUpdateSyncManager&&) = delete;
|
|
|
|
nsresult OpenLock(nsIFile* anAppFile = nullptr);
|
|
void ReleaseLock();
|
|
|
|
mozilla::MultiInstLockHandle mLock = MULTI_INSTANCE_LOCK_HANDLE_ERROR;
|
|
};
|
|
|
|
#endif // nsUpdateSyncManager_h__
|