How to save reference to an native-object (c++)

[Cengiz]

Hi,
what i do in my program:
I have a class in Java. Some Methods of this class call another global
native-method written in c++ (in a DLL). This method in c++ instances
a class. How can i do it, that at the next invocation i can use the
same instance without instantiate it new ?

 

[pete kirkham]

Hi,
what i do in my program:
I have a class in Java. Some Methods of this class call another global
native-method written in c++ (in a DLL). This method in c++ instances
a class. How can i do it, that at the next invocation i can use the
same instance without instantiate it new ?

Have a field in the Java class which is wide enough to contain the
address of the native object's pointer, which is passed as an argument
to/accessed inside the native method.


Pete

 

[Joseph Millar]

Hi,
what i do in my program:
I have a class in Java. Some Methods of this class call another global
native-method written in c++ (in a DLL). This method in c++ instances
a class. How can i do it, that at the next invocation i can use the
same instance without instantiate it new ?

Including Pete's approach (which I have used myself on
several ocassions), you can set a static field in the
C++ class and just retrieve it on entry to get the
instance pointer. Or set a DLL global variable.

In all of these instances, be sure you take thread
safety into consideration.

--Joe