зеркало из https://github.com/mozilla/gecko-dev.git
47 строки
1.4 KiB
C++
47 строки
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/**
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* ShutdownTracker is an imagelib-global service that allows callers to check
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* whether shutdown has started.
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*/
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#ifndef mozilla_image_ShutdownTracker_h
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#define mozilla_image_ShutdownTracker_h
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namespace mozilla {
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namespace image {
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/**
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* ShutdownTracker is an imagelib-global service that allows callers to check
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* whether shutdown has started. It exists to avoid the need for registering
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* many 'xpcom-will-shutdown' notification observers on short-lived objects,
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* which would have an unnecessary performance cost.
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*/
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struct ShutdownTracker
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{
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/**
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* Initialize static data. Called during imagelib module initialization.
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*/
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static void Initialize();
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/**
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* Check whether shutdown has started. Callers can use this to check whether
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* it's safe to access XPCOM services; if shutdown has started, such calls
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* must be avoided.
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*
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* @return true if shutdown has already started.
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*/
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static bool ShutdownHasStarted();
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private:
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virtual ~ShutdownTracker() = 0; // Forbid instantiation.
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_ShutdownTracker_h
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