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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef MessageSender_h
     27 #define MessageSender_h
     28 
     29 #include <wtf/Assertions.h>
     30 #include "Connection.h"
     31 
     32 namespace CoreIPC {
     33 
     34 template<typename T> class MessageSender {
     35 public:
     36     template<typename U> bool send(const U& message)
     37     {
     38         return send(message, static_cast<T*>(this)->destinationID());
     39     }
     40 
     41     template<typename U> bool send(const U& message, uint64_t destinationID)
     42     {
     43         OwnPtr<ArgumentEncoder> argumentEncoder = ArgumentEncoder::create(destinationID);
     44         argumentEncoder->encode(message);
     45 
     46         return static_cast<T*>(this)->sendMessage(MessageID(U::messageID), argumentEncoder.release());
     47     }
     48 
     49     bool sendMessage(MessageID messageID, PassOwnPtr<ArgumentEncoder> argumentEncoder)
     50     {
     51         Connection* connection = static_cast<T*>(this)->connection();
     52         ASSERT(connection);
     53 
     54         return connection->sendMessage(messageID, argumentEncoder);
     55     }
     56 
     57     template<typename U> bool sendSync(const U& message, const typename U::Reply& reply, double timeout = Connection::NoTimeout)
     58     {
     59         return sendSync(message, reply, static_cast<T*>(this)->destinationID(), timeout);
     60     }
     61 
     62     template<typename U> bool sendSync(const U& message, const typename U::Reply& reply, uint64_t destinationID, double timeout = Connection::NoTimeout)
     63     {
     64         Connection* connection = static_cast<T*>(this)->connection();
     65         ASSERT(connection);
     66 
     67         return connection->sendSync(message, reply, destinationID, timeout);
     68     }
     69 };
     70 
     71 } // namespace CoreIPC
     72 
     73 #endif // MessageSender_h
     74