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