Bug 1686838 [wpt PR 27194] - [webcodecs] Deprecate VideoFrame.destroy()., a=testonly
[gecko.git] / xpcom / base / ClearOnShutdown.cpp
bloba03dfba044556fef51eac4671aecd94b3350f7c0
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #include "mozilla/ClearOnShutdown.h"
9 namespace mozilla {
10 namespace ClearOnShutdown_Internal {
12 Array<StaticAutoPtr<ShutdownList>,
13 static_cast<size_t>(ShutdownPhase::ShutdownPhase_Length)>
14 sShutdownObservers;
15 ShutdownPhase sCurrentShutdownPhase = ShutdownPhase::NotInShutdown;
17 void InsertIntoShutdownList(ShutdownObserver* aObserver, ShutdownPhase aPhase) {
18 // Adding a ClearOnShutdown for a "past" phase is an error.
19 if (PastShutdownPhase(aPhase)) {
20 MOZ_ASSERT(false, "ClearOnShutdown for phase that already was cleared");
21 aObserver->Shutdown();
22 delete aObserver;
23 return;
26 if (!(sShutdownObservers[static_cast<size_t>(aPhase)])) {
27 sShutdownObservers[static_cast<size_t>(aPhase)] = new ShutdownList();
29 sShutdownObservers[static_cast<size_t>(aPhase)]->insertBack(aObserver);
32 } // namespace ClearOnShutdown_Internal
34 // Called when XPCOM is shutting down, after all shutdown notifications have
35 // been sent and after all threads' event loops have been purged.
36 void KillClearOnShutdown(ShutdownPhase aPhase) {
37 using namespace ClearOnShutdown_Internal;
39 MOZ_ASSERT(NS_IsMainThread());
40 // Shutdown only goes one direction...
41 MOZ_ASSERT(!PastShutdownPhase(aPhase));
43 // Set the phase before notifying observers to make sure that they can't run
44 // any code which isn't allowed to run after the start of this phase.
45 sCurrentShutdownPhase = aPhase;
47 // It's impossible to add an entry for a "past" phase; this is blocked in
48 // ClearOnShutdown, but clear them out anyways in case there are phases
49 // that weren't passed to KillClearOnShutdown.
50 for (size_t phase = static_cast<size_t>(ShutdownPhase::First);
51 phase <= static_cast<size_t>(aPhase); phase++) {
52 if (sShutdownObservers[static_cast<size_t>(phase)]) {
53 while (ShutdownObserver* observer =
54 sShutdownObservers[static_cast<size_t>(phase)]->popLast()) {
55 observer->Shutdown();
56 delete observer;
58 sShutdownObservers[static_cast<size_t>(phase)] = nullptr;
63 } // namespace mozilla