1 files changed, 45 insertions, 0 deletions
diff --git a/xpcom/base/ClearOnShutdown.cpp b/xpcom/base/ClearOnShutdown.cpp
new file mode 100644
index 0000000000..bfb3142bc3
--- /dev/null
+++ b/xpcom/base/ClearOnShutdown.cpp
@@ -0,0 +1,45 @@
+/* -*- 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