Compilation error

[BeerFizz]

Hi,

I am trying to incorporate several classes I got off of Code-project (which I think were originally written for Visual C++6.0) into a dialog application under Microsoft Visual C++ .NET 2003.

I am having an issue with a particular call and after spending several hour at this, I am still unable to get it to compile correctly and get the following error:

error C2664: 'myThread::myThread(LPTHREAD_START_ROUTINE,LPVOID,DWORD,DWORD,BOOL)' : cannot convert parameter 1 from 'DWORD (LPVOID)' to 'LPTHREAD_START_ROUTINE'

this is the line which is calling causing the issue (i contains a reference to a function)

myThread* serverThread = new myThread(serverHandleThread,(void*)serverArgument);

This is the function prototype:

DWORD WINAPI serverHandleThread(LPVOID threadInfo);

This is the prototype of the 'class' myThread

	myThread(
		LPTHREAD_START_ROUTINE pThreadFunc,    // address of thread callback
		LPVOID pThreadFuncParameter=NULL,      // address of callback's parameter,
		DWORD  exeFlags=0,                     // creation flag
		DWORD  sSize=0,                        // stack size
		BOOL   inheritable=FALSE               // inheritable
	);

What is wrong and how do I fix this (explicitly)

Thanks for all help
Phil

 

[ArkM]

Thread starting routine should have no return value. It seems the serverHandleThread can't be a thread start routine (it returns DWORD). No legal conversion between DWORD(*)(LPVOID) and VOID(*)(LPVOID) function pointers.

 

[cpjust]

I'm using VC++ 2005 express and this code compiles fine for me:

#include <windows.h>

DWORD WINAPI serverHandleThread( LPVOID threadInfo )
{
    return 0;
}

class myThread
{
private:
	LPTHREAD_START_ROUTINE	m_pThreadFunc;
	LPVOID					m_pThreadFuncParameter;
	DWORD					m_exeFlags;
	DWORD					m_sSize;
	BOOL					m_inheritable;

public:
	myThread(
				LPTHREAD_START_ROUTINE pThreadFunc,    // address of thread callback
				LPVOID pThreadFuncParameter=NULL,      // address of callback's parameter,
				DWORD  exeFlags=0,                     // creation flag
				DWORD  sSize=0,                        // stack size
				BOOL   inheritable=FALSE               // inheritable
			)
	:	m_pThreadFunc( pThreadFunc ),
		m_pThreadFuncParameter( pThreadFuncParameter ),
		m_exeFlags( exeFlags ),
		m_sSize( sSize ),
		m_inheritable( inheritable )
	{}
};

int main( int argc, char* argv[] )
{
	LPVOID serverArgument = NULL;
	myThread* serverThread = new myThread( serverHandleThread, (void*)serverArgument );

	return 0;
}

See if that simplified program still gives you compile errors.
You can try casting serverHandleThread to LPTHREAD_START_ROUTINE, but that shouldn't be necessary.

 

[cpjust]

Thread starting routine should have no return value.

On my system, LPTHREAD_START_ROUTINE looks like this:

typedef [b]DWORD[/b] (WINAPI *PTHREAD_START_ROUTINE)(
    LPVOID lpThreadParameter
    );
typedef PTHREAD_START_ROUTINE LPTHREAD_START_ROUTINE;