diff -r 000000000000 -r 6474c204b198 netwerk/cache2/CacheIOThread.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/cache2/CacheIOThread.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,101 @@
+/* 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 CacheIOThread__h__
+#define CacheIOThread__h__
+
+#include "nsIThreadInternal.h"
+#include "nsISupportsImpl.h"
+#include "prthread.h"
+#include "nsTArray.h"
+#include "nsAutoPtr.h"
+#include "mozilla/Monitor.h"
+
+class nsIRunnable;
+
+namespace mozilla {
+namespace net {
+
+class CacheIOThread : public nsIThreadObserver
+{
+public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSITHREADOBSERVER
+
+  CacheIOThread();
+  virtual ~CacheIOThread();
+
+  enum ELevel {
+    OPEN_PRIORITY,
+    READ_PRIORITY,
+    OPEN,
+    READ,
+    MANAGEMENT,
+    WRITE,
+    CLOSE,
+    INDEX,
+    EVICT,
+    LAST_LEVEL,
+
+    // This is actually executed as the first level, but we want this enum
+    // value merely as an indicator while other values are used as indexes
+    // to the queue array.  Hence put at end and not as the first.
+    XPCOM_LEVEL
+  };
+
+  nsresult Init();
+  nsresult Dispatch(nsIRunnable* aRunnable, uint32_t aLevel);
+  // Makes sure that any previously posted event to OPEN or OPEN_PRIORITY
+  // levels (such as file opennings and dooms) are executed before aRunnable
+  // that is intended to evict stuff from the cache.
+  nsresult DispatchAfterPendingOpens(nsIRunnable* aRunnable);
+  bool IsCurrentThread();
+
+  /**
+   * Callable only on this thread, checks if there is an event waiting in
+   * the event queue with a higher execution priority.  If so, the result
+   * is true and the current event handler should break it's work and return
+   * from Run() method immediately.  The event handler will be rerun again
+   * when all more priority events are processed.  Events pending after this
+   * handler (i.e. the one that called YieldAndRerun()) will not execute sooner
+   * then this handler is executed w/o a call to YieldAndRerun().
+   */
+  static bool YieldAndRerun()
+  {
+    return sSelf ? sSelf->YieldInternal() : false;
+  }
+
+  nsresult Shutdown();
+  already_AddRefed<nsIEventTarget> Target();
+
+  // Memory reporting
+  size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
+
+private:
+  static void ThreadFunc(void* aClosure);
+  void ThreadFunc();
+  void LoopOneLevel(uint32_t aLevel);
+  bool EventsPending(uint32_t aLastLevel = LAST_LEVEL);
+  nsresult DispatchInternal(nsIRunnable* aRunnable, uint32_t aLevel);
+  bool YieldInternal();
+
+  static CacheIOThread* sSelf;
+
+  mozilla::Monitor mMonitor;
+  PRThread* mThread;
+  nsCOMPtr<nsIThread> mXPCOMThread;
+  uint32_t mLowestLevelWaiting;
+  uint32_t mCurrentlyExecutingLevel;
+  nsTArray<nsRefPtr<nsIRunnable> > mEventQueue[LAST_LEVEL];
+
+  bool mHasXPCOMEvents;
+  bool mRerunCurrentEvent;
+  bool mShutdown;
+};
+
+} // net
+} // mozilla
+
+#endif