forked from mirrors/gecko-dev
b8cb45e0e0
We need to avoid the new for each specialization, the GetInstance of the base class does actually not create anything new. If the UserIdleService has been instantiated earlier than shutdown we continue to hand it out via GetInstance to give other things shutting down a chance to remove their observers, but if it has never been instantiated (or it is gone as we are very, very late in shutdown) we won't create a new one. Differential Revision: https://phabricator.services.mozilla.com/D180130
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:expandtab:shiftwidth=4:tabstop=4:
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*/
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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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#ifndef nsUserIdleServiceWin_h__
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#define nsUserIdleServiceWin_h__
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#include "nsUserIdleService.h"
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#include "mozilla/AppShutdown.h"
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/* NOTE: Compare of GetTickCount() could overflow. This corrects for
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* overflow situations.
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***/
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#ifndef SAFE_COMPARE_EVEN_WITH_WRAPPING
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# define SAFE_COMPARE_EVEN_WITH_WRAPPING(A, B) \
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(((int)((long)A - (long)B) & 0xFFFFFFFF))
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#endif
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class nsUserIdleServiceWin : public nsUserIdleService {
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public:
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NS_INLINE_DECL_REFCOUNTING_INHERITED(nsUserIdleServiceWin, nsUserIdleService)
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bool PollIdleTime(uint32_t* aIdleTime) override;
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static already_AddRefed<nsUserIdleServiceWin> GetInstance() {
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RefPtr<nsUserIdleServiceWin> idleService =
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nsUserIdleService::GetInstance().downcast<nsUserIdleServiceWin>();
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if (!idleService) {
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// Avoid late instantiation or resurrection during shutdown.
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if (mozilla::AppShutdown::IsInOrBeyond(
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mozilla::ShutdownPhase::AppShutdownConfirmed)) {
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return nullptr;
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}
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idleService = new nsUserIdleServiceWin();
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}
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return idleService.forget();
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}
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protected:
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nsUserIdleServiceWin() {}
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virtual ~nsUserIdleServiceWin() {}
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};
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#endif // nsUserIdleServiceWin_h__
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