Re: Template class Compile problem

From:
Mark <mnbayazit@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 31 Jan 2008 00:55:16 -0800 (PST)
Message-ID:
<f037aa2c-ddd2-4dc3-9e56-99c0dbf7c54b@l1g2000hsa.googlegroups.com>
On Jan 31, 12:21 am, hyderabadblues <sirishku...@gmail.com> wrote:

I have created a timer class which is a template, but when I tried to
to create an object , I am getting following compile time error

template<class T>class prefetcher_tclTimer
{
   typedef tVoid (T::*PMEMFUNC)();

   private:
      T* m_poClient; // Pointer to calling class
      PMEMFUNC m_pMemFunc;
      tU32 _u32Timeout;
      tU32 _u32TimerInterval;
      static void vOnTimeout( tPVoid arg );
      tclTrace *m_poTrace;

   public:
      // Public functions
      // connstructor / destructor
      prefetcher_tclTimer ( );
      ~prefetcher_tclTimer( );

      tBool Create( tU32 u32TimerMSec, tU32 u32TimerIntervalMSec,
                       T* _poClient, PMEMFUNC _pMemFunc );
      tBool bStart( );
      tBool bReset( );
      tBool bStop ( );

};

I have defined the function bStart as

tBool prefetcher_tclTimer::bStart( )
{
   tS32 s32RetVal;

   if( _phTimerHandle != INVALID_HANDLE )
   {
      m_poTrace->vInfo(" prefetcher_tclTimer::bStart "):

      s32RetVal = s32TimerSetTime( _phTimerHandle, _u32Timeout,
                                        _u32TimerInterval );
      if( s32RetVal != OK )
      {
         m_poTrace->vInfo("prefetcher_tclTimer::bStart( ), Timer Set
Failed");
      }
   }
   else
   {
      m_poTrace->vInfo("prefetcher_tclTimer::bStart( ), Invalid Timer
Handler");
      s32RetVal = FALSE;
   }
   return (tBool)s32RetVal;

}

I am getting an error as when tried to to compile it, I am creating
the template object with parameter tclUsbDataBuffer

Error: L6218E: Undefined symbol
prefetcher_tclTimer<tclUsbDataBuffer>::bStart() (referred from
usbDataBuffer.o).


The simple answer is to put the entire function (including
definitions) in the .h file. There's a reason for this, but I'd
probably screw up the explanation quite horribly and you're better to
google it.

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