forked from mirrors/gecko-dev
cd118fb4f9
Depends on D163128 Differential Revision: https://phabricator.services.mozilla.com/D163175
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "mozilla/ClearOnShutdown.h"
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namespace mozilla {
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namespace ClearOnShutdown_Internal {
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Array<StaticAutoPtr<ShutdownList>,
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static_cast<size_t>(ShutdownPhase::ShutdownPhase_Length)>
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sShutdownObservers;
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ShutdownPhase sCurrentClearOnShutdownPhase = ShutdownPhase::NotInShutdown;
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void InsertIntoShutdownList(ShutdownObserver* aObserver, ShutdownPhase aPhase) {
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// Adding a ClearOnShutdown for a "past" phase is an error.
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if (PastShutdownPhase(aPhase)) {
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MOZ_ASSERT(false, "ClearOnShutdown for phase that already was cleared");
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aObserver->Shutdown();
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delete aObserver;
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return;
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}
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if (!(sShutdownObservers[static_cast<size_t>(aPhase)])) {
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sShutdownObservers[static_cast<size_t>(aPhase)] = new ShutdownList();
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}
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sShutdownObservers[static_cast<size_t>(aPhase)]->insertBack(aObserver);
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}
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} // namespace ClearOnShutdown_Internal
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// Called by AdvanceShutdownPhase each time we switch a phase. Will null out
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// pointers added by ClearOnShutdown for all phases up to and including aPhase.
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void KillClearOnShutdown(ShutdownPhase aPhase) {
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using namespace ClearOnShutdown_Internal;
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MOZ_ASSERT(NS_IsMainThread());
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// Shutdown only goes one direction...
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MOZ_ASSERT(!PastShutdownPhase(aPhase));
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// Set the phase before notifying observers to make sure that they can't run
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// any code which isn't allowed to run after the start of this phase.
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sCurrentClearOnShutdownPhase = aPhase;
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// It's impossible to add an entry for a "past" phase; this is blocked in
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// ClearOnShutdown, but clear them out anyways in case there are phases
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// that weren't passed to KillClearOnShutdown.
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for (size_t phase = static_cast<size_t>(ShutdownPhase::First);
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phase <= static_cast<size_t>(aPhase); phase++) {
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if (sShutdownObservers[static_cast<size_t>(phase)]) {
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while (ShutdownObserver* observer =
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sShutdownObservers[static_cast<size_t>(phase)]->popLast()) {
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observer->Shutdown();
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delete observer;
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}
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sShutdownObservers[static_cast<size_t>(phase)] = nullptr;
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}
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}
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}
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} // namespace mozilla
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