Added

git-svn-id: svn://10.0.0.236/trunk@32093 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpcom/threads/nsEventQueueService.h

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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#ifndef nsEventQueueService_h__
+#define nsEventQueueService_h__
+
+#include "nsIEventQueueService.h"
+#include "nsHashtable.h"
+
+class nsIEventQueue;
+
+////////////////////////////////////////////////////////////////////////////////
+
+// XXX move to nsID.h or nsHashtable.h? (copied from nsComponentManager.cpp)
+class ThreadKey: public nsHashKey {
+private:
+  const PRThread* id;
+  
+public:
+  ThreadKey(const PRThread* aID) {
+    id = aID;
+  }
+  
+  PRUint32 HashValue(void) const {
+    return (PRUint32)id;
+  }
+
+  PRBool Equals(const nsHashKey *aKey) const {
+    return (id == ((const ThreadKey *) aKey)->id);
+  }
+
+  nsHashKey *Clone(void) const {
+    return new ThreadKey(id);
+  }
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+/* This class is used with the EventQueueEntries to allow us to nest
+   event queues */
+class EventQueueStack
+{
+public:
+	EventQueueStack(EventQueueStack* next = NULL);
+	~EventQueueStack();
+
+	nsIEventQueue* GetEventQueue();
+	EventQueueStack* GetNext();
+  void SetNext(EventQueueStack* aStack);
+
+private:
+	nsIEventQueue* mEventQueue;
+	EventQueueStack* mNextQueue;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+/*
+ * This class maintains the data associated with each entry in the EventQueue
+ * service's hash table...
+ *
+ * It derives from nsISupports merely as a convienence since the entries are
+ * reference counted...
+ */
+class EventQueueEntry : public nsISupports 
+{
+public:
+  EventQueueEntry();
+  virtual ~EventQueueEntry();
+
+  // nsISupports interface...
+  NS_DECL_ISUPPORTS
+
+  nsIEventQueue* GetEventQueue(void);
+  
+	void PushQueue(void);
+  void PopQueue(void);
+
+private: 
+	EventQueueStack* mQueueStack;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+class nsEventQueueServiceImpl : public nsIEventQueueService
+{
+public:
+  nsEventQueueServiceImpl();
+  virtual ~nsEventQueueServiceImpl();
+
+  static NS_METHOD
+  Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);
+
+  // nsISupports interface...
+  NS_DECL_ISUPPORTS
+
+  // nsIEventQueueService interface...
+  NS_IMETHOD CreateThreadEventQueue(void);
+  NS_IMETHOD DestroyThreadEventQueue(void);
+  NS_IMETHOD GetThreadEventQueue(PRThread* aThread, nsIEventQueue** aResult);
+
+  NS_IMETHOD CreateFromPLEventQueue(PLEventQueue* aPLEventQueue, nsIEventQueue** aResult);
+
+  NS_IMETHOD PushThreadEventQueue(void);
+  NS_IMETHOD PopThreadEventQueue(void);
+
+#ifdef XP_MAC
+  NS_IMETHOD ProcessEvents();
+#endif // XP_MAC
+
+private:
+  nsHashtable* mEventQTable;
+  PRMonitor*   mEventQMonitor;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+#endif // nsEventQueueService_h__