Application crash and use of mixed calling conventions ...

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.

Quote:

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Originally Posted by VipulPathak

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.

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

Regards,

Paul McKenzie

Quote:

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

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

Thanks Paul and Igor,

Could you please give an example.

Consider the following code snippet as an example:

Code:

---

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.

Quote:

---

Originally Posted by VipulPathak

Thanks Paul and Igor,

Could you please give an example.

Consider the following code snippet as an example:

Code:

---

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.

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