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k3resolverworkerbase.h

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00001 /*  -*- C++ -*-
00002  *  Copyright (C) 2003-2005 Thiago Macieira <thiago@kde.org>
00003  *
00004  *
00005  *  Permission is hereby granted, free of charge, to any person obtaining
00006  *  a copy of this software and associated documentation files (the
00007  *  "Software"), to deal in the Software without restriction, including
00008  *  without limitation the rights to use, copy, modify, merge, publish,
00009  *  distribute, sublicense, and/or sell copies of the Software, and to
00010  *  permit persons to whom the Software is furnished to do so, subject to
00011  *  the following conditions:
00012  *
00013  *  The above copyright notice and this permission notice shall be included 
00014  *  in all copies or substantial portions of the Software.
00015  *
00016  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00017  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00018  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00019  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00020  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00021  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00022  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00023  */
00024 
00025 #ifndef KRESOLVERWORKERBASE_H
00026 #define KRESOLVERWORKERBASE_H
00027 
00028 #include "k3resolver.h"
00029 
00030 // forward declarations
00031 class QString;
00032 template <class T> class QValueList;
00033 
00034 namespace KNetwork {
00035 
00036   namespace Internal
00037   {
00038     class KResolverThread;
00039     struct InputData;
00040   }
00041 
00064 class KResolverWorkerBase
00065 {
00066 public:
00067 
00074   class ResolverLocker
00075   {
00076   public:
00080     ResolverLocker(KResolverWorkerBase* parent)
00081       : parent( parent ) 
00082     {
00083       parent->acquireResolver();
00084     }
00085 
00089     ~ResolverLocker() 
00090     {
00091       parent->releaseResolver();
00092     }
00093 
00099     void openClose() 
00100     {
00101       parent->releaseResolver();
00102       parent->acquireResolver();
00103     }
00104 
00105   private:
00107     KResolverWorkerBase* parent;
00108   };
00109 private:
00110   // this will be like our d pointer
00111   KNetwork::Internal::KResolverThread *th;
00112   const KNetwork::Internal::InputData *input;
00113   friend class KNetwork::Internal::KResolverThread;
00114   friend class KNetwork::Internal::KResolverManager;
00115   friend class KResolverWorkerBase::ResolverLocker;
00116 
00117   int m_finished : 1;
00118   int m_reserved : 31;      // reserved
00119 
00120 public:
00128   KResolverResults results;
00129 
00130 public:
00131   // default constructor
00132   KResolverWorkerBase();
00133 
00134   // virtual destructor
00135   virtual ~KResolverWorkerBase();
00136 
00140   QString nodeName() const;
00141 
00145   QString serviceName() const;
00146 
00150   int flags() const;
00151 
00155   int familyMask() const;
00156 
00160   int socketType() const;
00161 
00165   int protocol() const;
00166 
00170   QByteArray protocolName() const;
00171 
00178   void finished();
00179 
00180 protected:
00181   // like a QThread
00194   virtual bool run() = 0;
00195 
00215   virtual bool preprocess() = 0;
00216 
00225   virtual bool postprocess();
00226 
00230   inline void setError(int errorcode, int syserror = 0)
00231   { results.setError(errorcode, syserror); }
00232 
00248   bool enqueue(KResolver* other);
00249 
00253   bool enqueue(KResolverWorkerBase* worker);
00254 
00261   bool checkResolver();
00262 
00272   void acquireResolver();
00273 
00278   void releaseResolver();
00279 
00280 };
00281 
00291 class KResolverWorkerFactoryBase
00292 {
00293 public:
00294   virtual ~KResolverWorkerFactoryBase() {}
00295   virtual KResolverWorkerBase* create() const = 0;
00301   static void registerNewWorker(KResolverWorkerFactoryBase* factory);
00302 };
00303 
00313 template<class Worker>
00314 class KResolverWorkerFactory: public KResolverWorkerFactoryBase
00315 {
00316 public:
00317   virtual KResolverWorkerBase* create() const
00318   { return new Worker; }
00319 };
00320 
00321 }               // namespace KNetwork
00322 
00323 #endif

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