OW_Select.hpp

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00030 
00036 #ifndef OW_SELECT_HPP_
00037 #define OW_SELECT_HPP_
00038 #include "OW_config.h"
00039 #include "OW_Types.hpp"
00040 #include "OW_Array.hpp"
00041 #include "OW_SelectableIFC.hpp"
00042 
00043 // The classes and functions defined in this file are not meant for general
00044 // use, they are internal implementation details.  They may change at any time.
00045 
00046 namespace OW_NAMESPACE
00047 {
00048 
00049 typedef Array<Select_t> SelectTypeArray;
00050 namespace Select
00051 {
00055    const int SELECT_TIMEOUT = -2;
00059    const int SELECT_ERROR = -1;
00063    const int SELECT_INTERRUPTED = -3;
00067    const int SELECT_NOT_IMPLEMENTED = -4;
00071    const UInt32 INFINITE_TIMEOUT = ~0U;
00072    
00086    OW_COMMON_API int select(const SelectTypeArray& selarray, UInt32 ms = INFINITE_TIMEOUT);
00087 
00088    struct SelectObject
00089    {
00090       SelectObject(Select_t s_)
00091       : s(s_)
00092       , waitForRead(false)
00093       , waitForWrite(false)
00094       , readAvailable(false)
00095       , writeAvailable(false)
00096       , wasError(false)
00097       {
00098       }
00099 
00100       Select_t s;
00102       bool waitForRead; 
00104       bool waitForWrite; 
00106       bool readAvailable;
00108       bool writeAvailable;
00110       bool wasError;
00111    };
00112    typedef Array<SelectObject> SelectObjectArray;
00113 
00128    OW_COMMON_API int selectRW(SelectObjectArray& selarray, UInt32 ms = INFINITE_TIMEOUT);
00129 
00130 } // end namespace Select
00131 
00132 } // end namespace OW_NAMESPACE
00133 
00134 #endif // OW_SELECT_HPP_

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