/* -*- 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 sCurrentShutdownPhase = ShutdownPhase::NotInShutdown;

} // namespace ClearOnShutdown_Internal

// Called when XPCOM is shutting down, after all shutdown notifications have

// been sent and after all threads' event loops have been purged.

void

KillClearOnShutdown(ShutdownPhase aPhase)

{

  using namespace ClearOnShutdown_Internal;

  MOZ_ASSERT(NS_IsMainThread());

  // Shutdown only goes one direction...

  MOZ_ASSERT(static_cast<size_t>(sCurrentShutdownPhase) < static_cast<size_t>(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)]->popFirst()) {

        observer->Shutdown();

        delete observer;

      }

      sShutdownObservers[static_cast<size_t>(phase)] = nullptr;

    }

  }

}

} // namespace mozilla