import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/cache/nsCacheUtils.h

@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set sw=2 ts=8 et 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/. */
+
+#ifndef _nsCacheUtils_h_
+#define _nsCacheUtils_h_
+
+#include "nsThreadUtils.h"
+#include "nsCOMPtr.h"
+#include "mozilla/Monitor.h"
+
+class nsIThread;
+
+/**
+ * A class with utility methods for shutting down nsIThreads easily.
+  */
+class nsShutdownThread : public mozilla::Runnable {
+public:
+  explicit nsShutdownThread(nsIThread *aThread);
+  ~nsShutdownThread();
+
+  NS_IMETHOD Run();
+
+/**
+ * Shutdown ensures that aThread->Shutdown() is called on a main thread
+ */
+  static nsresult Shutdown(nsIThread *aThread);
+
+/**
+ * BlockingShutdown ensures that by the time it returns, aThread->Shutdown() has
+ * been called and no pending events have been processed on the current thread.
+ */
+  static nsresult BlockingShutdown(nsIThread *aThread);
+
+private:
+  mozilla::Monitor    mMonitor;
+  bool                mShuttingDown;
+  nsCOMPtr<nsIThread> mThread;
+};
+
+#endif