Java HotSpot Virtual Machine

Hi folks,

Not sure whether this is a Windows forum question or not. I'm writing some simple JNI methods that call into Windows OS routines such as GetComputerName and GetSystemDirectory. The following is a sample method I've written that currently works:

JNIEXPORT jstring JNICALL Java_org_adym_MSInfoXample001_getComputerName ( 
     JNIEnv *   ljvmEnv 
    ,jobject    ljavaClass
) {
    size_t      i;
    wchar_t     lbufInfo[INFO_BUFFER_SIZE];
    DWORD       llngCount = INFO_BUFFER_SIZE;
    char        *lbufConverted = (char *)malloc( INFO_BUFFER_SIZE );
     
    // Get and display the name of the computer. 
    //
    llngCount = INFO_BUFFER_SIZE;
    if( !GetComputerName( lbufInfo, &llngCount ) ) { 
        printf( "GetComputerName Failed!!!\n" ); 
    }

    // Convert the string...
    //
    wcstombs_s ( 
         &i
        ,lbufConverted
        ,(size_t)INFO_BUFFER_SIZE
        ,lbufInfo
        ,(size_t)INFO_BUFFER_SIZE 
    );

    // Free multibyte character buffer
    //if ( lbufConverted ) {
    //    free( lbufConverted );
    //}

    //ljvmEnv->ReleaseStringUTFChars( lbufConverted, str );
    return ljvmEnv->NewStringUTF( lbufConverted );

}

I got the conversion code off the M$ website as an example of how to use the wcstombs_s() function. The only way to interface with these types of OS functions is with a TCHAR or wchar_t. From other post in other forums, the newer (supported) way is wchar_t. Then I needed to convert those wchar_t strings over to char* in order to pass them back to Java. My C/C++ is rusty, especially with regards to Windows...In fact, I've never really written C/C++ to Windows before.

My question is, how do I release/free up the char* I created with malloc?

I've tried a couple of different ways, see commented code before the return statement, but nothing seems to work. If I use the free() before the return, I get garbage on the Java side...no big surprise there. The other ReleaseStringUTFChars() function call I haven't tried, only because I can't really see calling it "before" the call to NewStringUTF()...

Any help would be appreciated...

P.S. If you know a better way to do the conversion please tell me...I'm open to any kind of help at this point.

tia,

adym