I'm wrapping unmanaged C++ classes using the standard managed C++ approach.
i.e. a __gc class that contains an internal pointer to an unmanaged class.
The purpose is to generate a .NET class library from our unmanaged class
library.
There are static unmanaged classes in this library, so I'm following the
MSFT approach of creating static functions that call __crt_dll_initi alize at
startup and __crt_dll_termi nate at the end of the calling application. My
problem occurs when I call the __crt_dll_termi nate function at the end of my
test application. Immediately after this function gets called, the garbage
collector cleans up wrapper classes.
WrapperClass::~ WrapperClass(){
if(m_ptr) delete m_ptr; //delete internal unmanaged class
m_ptr=NULL;
}
The wrapper class finalizer throws a NullPointer exception when I attempt to
delete the internal pointer. If I remove the call to __crt_dll_termi nate,
everything works fine. I guess I'm confused as to what to do about this.
Thanks for any help in advance,
-steve 1 1500
If you write your own destructor you must suppress the GC finalizer.
So In your Wrapper class, override Dispose method:
public void Dispose()
{ // ... do your clean up
GC.SuppressFina lize(this);
}
--
This posting is provided "AS IS" with no warranties, and confers no rights.
"Steve Baer" <st***@nospam.o rg> wrote in message
news:10******** *****@corp.supe rnews.com... I'm wrapping unmanaged C++ classes using the standard managed C++ approach. i.e. a __gc class that contains an internal pointer to an unmanaged class. The purpose is to generate a .NET class library from our unmanaged class library.
There are static unmanaged classes in this library, so I'm following the MSFT approach of creating static functions that call __crt_dll_initi alize at startup and __crt_dll_termi nate at the end of the calling application. My problem occurs when I call the __crt_dll_termi nate function at the end of my test application. Immediately after this function gets called, the garbage collector cleans up wrapper classes.
WrapperClass::~ WrapperClass(){ if(m_ptr) delete m_ptr; //delete internal unmanaged class m_ptr=NULL; }
The wrapper class finalizer throws a NullPointer exception when I attempt to delete the internal pointer. If I remove the call to __crt_dll_termi nate, everything works fine. I guess I'm confused as to what to do about this.
Thanks for any help in advance, -steve
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