Dynamic-linked DLL needs to share a global variable with its caller.
- by Fabian Wickborn
I have a static library libStatic that defines a global variable like this
Header file libStatic/globals.h:
extern int globvar;
Code file libStatic/globals.cpp:
int globvar = 42;
The DLL libDynamic and the executable runner are using this global variable. Furtheron, libDynamic is linked at run-time into runner (via LoadLibrary(), GetProcAddress(), and the works...)
I understand this will lead to globvar being created twice, once in the heap of runner and once in the heap of libDynamic, which is of course very undesirable.
Is there a good away around this? How can I ensure that libDynamic and runner are using the same globvar?