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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 ThreadLauncher_h
     27 #define ThreadLauncher_h
     28 
     29 #include "Connection.h"
     30 #include "PlatformProcessIdentifier.h"
     31 #include <wtf/RefPtr.h>
     32 #include <wtf/Threading.h>
     33 
     34 #if PLATFORM(QT)
     35 class QLocalSocket;
     36 #endif
     37 
     38 namespace WebKit {
     39 
     40 class ThreadLauncher : public ThreadSafeRefCounted<ThreadLauncher> {
     41 public:
     42     class Client {
     43     public:
     44         virtual ~Client() { }
     45         virtual void didFinishLaunching(ThreadLauncher*, CoreIPC::Connection::Identifier) = 0;
     46     };
     47 
     48     static PassRefPtr<ThreadLauncher> create(Client* client)
     49     {
     50         return adoptRef(new ThreadLauncher(client));
     51     }
     52 
     53     bool isLaunching() const { return m_isLaunching; }
     54 
     55     void invalidate();
     56 
     57 private:
     58     explicit ThreadLauncher(Client*);
     59 
     60     void launchThread();
     61     void didFinishLaunchingThread(CoreIPC::Connection::Identifier);
     62 
     63     static CoreIPC::Connection::Identifier createWebThread();
     64 
     65     bool m_isLaunching;
     66     Client* m_client;
     67 };
     68 
     69 } // namespace WebKit
     70 
     71 #endif // ThreadLauncher_h
     72