SelectEngine.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
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00030 *******************************************************************************/
00031 
00032 
00038 #include "blocxx/BLOCXX_config.h"
00039 #include "blocxx/SelectEngine.hpp"
00040 #include "blocxx/Select.hpp"
00041 #include "blocxx/ExceptionIds.hpp"
00042 
00043 namespace BLOCXX_NAMESPACE
00044 {
00045 
00046 BLOCXX_DEFINE_EXCEPTION_WITH_ID(Select);
00048 void
00049 SelectEngine::addSelectableObject(const SelectableIFCRef& obj,
00050    const SelectableCallbackIFCRef& cb)
00051 {
00052    m_selectableObjs.push_back(obj);
00053    m_callbacks.push_back(cb);
00054 }
00056 void
00057 SelectEngine::go()
00058 {
00059    m_stopFlag = false;
00060    do
00061    {
00062       SelectTypeArray selObjs;
00063       for (size_t i = 0; i < m_selectableObjs.size(); ++i)
00064       {
00065          selObjs.push_back(m_selectableObjs[i]->getSelectObj());
00066       }
00067       int selected = Select::select(selObjs);
00068       if (selected == Select::SELECT_ERROR)
00069       {
00070          BLOCXX_THROW(SelectException, "Select Error");
00071       }
00072       else if (selected == Select::SELECT_TIMEOUT
00073              || selected == Select::SELECT_INTERRUPTED)
00074       {
00075          continue;
00076       }
00077       else
00078       {
00079          m_callbacks[selected]->selected(m_selectableObjs[selected]);
00080       }
00081    } while (!m_stopFlag);
00082 }
00084 void
00085 SelectEngine::stop()
00086 {
00087    m_stopFlag = true;
00088 }
00089 
00091 SelectEngineStopper::SelectEngineStopper(SelectEngine& engine)
00092    : SelectableCallbackIFC()
00093    , m_engine(engine)
00094 {
00095 }
00096 
00098 void 
00099 SelectEngineStopper::doSelected(SelectableIFCRef& selectedObject)
00100 {
00101    m_engine.stop();
00102 }
00103 
00104 } // end namespace BLOCXX_NAMESPACE
00105 

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