vlSelectParamW.h

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/*********************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
*********************************************************************/
#pragma once

#ifdef DtUSE_UTILITIES_NAMESPACE
namespace DtUSE_UTILITIES_NAMESPACE
{
#endif


class DtSelectParamWithWrite 
{
   public:
      DtSelectParamWithWrite();

      int select(DtTime timeout);
      void addRead(int fd);
      void delRead(int fd);
      int canRead(int fd);
      void addWrite(int fd);
      void clearWrite();
      
   protected:
      int myMaxFD;
      fd_set myRead0, myRead;
      fd_set myWrite0, myWrite;
};

inline 
DtSelectParamWithWrite::DtSelectParamWithWrite() 
{
   FD_ZERO(&myRead0);
   FD_ZERO(&myWrite0);
   myRead = myRead0;
   myWrite = myWrite0;
   myMaxFD = -1; 
}

inline int 
DtSelectParamWithWrite::select(DtTime timeout) 
{
   myRead = myRead0;
   myWrite = myWrite0;
   return DtSelect(myMaxFD+1, &myRead, &myWrite, NULL, timeout);
}

inline void 
DtSelectParamWithWrite::addRead(int fd) 
{ 
   FD_SET((unsigned int) fd, &myRead0); 
   myMaxFD = DtMax(myMaxFD, fd);
}

inline void 
DtSelectParamWithWrite::delRead(int fd) 
{ 
   FD_CLR((unsigned int) fd, &myRead0); 
}

inline int 
DtSelectParamWithWrite::canRead(int fd) 
{      
   return ((int)(FD_ISSET((unsigned int) fd, &myRead)));
}

inline void 
DtSelectParamWithWrite::addWrite(int fd) 
{ 
   FD_SET((unsigned int) fd, &myWrite0); 
   myMaxFD = DtMax(myMaxFD, fd);
}

inline void 
DtSelectParamWithWrite::clearWrite() { 
   FD_ZERO(&myWrite0);
}

#ifdef DtUSE_UTILITIES_NAMESPACE
} 
#endif