import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/components/filewatcher/NativeFileWatcherWin.h

@@ -0,0 +1,50 @@
+/* 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 mozilla_nativefilewatcher_h__
+#define mozilla_nativefilewatcher_h__
+
+#include "nsINativeFileWatcher.h"
+#include "nsIObserver.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsThreadUtils.h"
+
+// We need to include this header here for HANDLE definition.
+#include <windows.h>
+
+namespace mozilla {
+
+class NativeFileWatcherService final : public nsINativeFileWatcherService,
+                                       public nsIObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSINATIVEFILEWATCHERSERVICE
+  NS_DECL_NSIOBSERVER
+
+  NativeFileWatcherService();
+
+  nsresult Init();
+
+private:
+  // The |HANDLE| to the I/O Completion Port, owned by the main thread.
+  HANDLE mIOCompletionPort;
+  nsCOMPtr<nsIThread> mIOThread;
+
+  // The instance of the runnable dealing with the I/O.
+  nsCOMPtr<nsIRunnable> mWorkerIORunnable;
+
+  nsresult Uninit();
+  void WakeUpWorkerThread();
+
+  // Make the dtor private to make this object only deleted via its ::Release() method.
+  ~NativeFileWatcherService();
+  NativeFileWatcherService(const NativeFileWatcherService& other) = delete;
+  void operator=(const NativeFileWatcherService& other) = delete;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_nativefilewatcher_h__