Application crash and use of mixed calling conventions ...

[VipulPathak]

Hi Everyone,

I have a DLL in my application that exports 5 functions. This DLL internally uses a few C++ classes and finally provide the functionality to DLL client applications by means of those exposed 5 functions.

The application has started crashing when the DLL started using C++ classes to implement functionality. The code inside C++ classes, when added a simple C code, then the crash doesn't happen.

I am aware of calling conventions, like- __stdcall and __cdecl etc. But not aware, how to use use both __cdecl and __stdcall in the same DLL.

Any suggestion from anyone ?

Any help is greatly appreciated.

[Paul McKenzie]

I am aware of calling conventions, like- __stdcall and __cdecl etc. But not aware, how to use use both __cdecl and __stdcall in the same DLL.

You explicitly specify "__cdecl" or "__stdcall" when declaring each function in the DLL.

Regards,

Paul McKenzie

[Igor Vartanov]

not aware, how to use use both __cdecl and __stdcall in the same DLL

There's no any magic in that, you just need to specify the convention explicitly.

[VipulPathak]

Thanks Paul and Igor,

Could you please give an example.

Consider the following code snippet as an example:

BOOL WINAPI GetServerInfo(OUT LPTSTR *lpInfo)
{
    .   .   .
    .   .   .

    string sServerIpAddress = SysUtils::GetServerAddress() ;
    string sServerName = SysUtils::GetThisComputerName() ;

    .   .   .
    .   .   .

    {
        ProgressLog objProgressLog( sCodeProgessLogFileName ) ;
        objProgressLog.AddInfoLine( TEXT("Returning IP and Name ...") ) ;
    }

}

Here ProgressLog and SysUtils are C++ classes. GetServerInfo() is a DLL function.

Did you meant that I should put __cdecl in fron of every method in Header files of ProgressLog and SysUtils ?

Should I also put __cdecl in CPP files ?

Please elaborate.

[Amleto]

Thanks Paul and Igor,

Could you please give an example.

Consider the following code snippet as an example:

BOOL WINAPI GetServerInfo(OUT LPTSTR *lpInfo)
{
    .   .   .
    .   .   .

    string sServerIpAddress = SysUtils::GetServerAddress() ;
    string sServerName = SysUtils::GetThisComputerName() ;

    .   .   .
    .   .   .

    {
        ProgressLog objProgressLog( sCodeProgessLogFileName ) ;
        objProgressLog.AddInfoLine( TEXT("Returning IP and Name ...") ) ;
    }

}

Here ProgressLog and SysUtils are C++ classes. GetServerInfo() is a DLL function.

Did you meant that I should put __cdecl in fron of every method in Header files of ProgressLog and SysUtils ?

Should I also put __cdecl in CPP files ?

Please elaborate.

http://lmgtfy.com/?q=calling+convent...on+declaration