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keep_alive.h

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#ifndef header_keepalive
#define header_keepalive

class CL_KeepAlive
//: Keep alive callback interface.
// <p>If you want to add something that gets called in a
// CL_System::keep_alive() call, inherit this class and create an instance
// of it.</p>
{
public:
        CL_KeepAlive();
        // Constructs and registers the object as a keep_alive listener.
        
        virtual ~CL_KeepAlive();
        // Unregisters the object as a keep_alive listener.

        virtual void keep_alive()=0;
        // Called when CL_System::keep_alive() is called.
};

#endif

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