DLL thread safety

Question

I am developing a DLL in MS VC express c++ that will be loaded in multiple client applications at the same time, the DLL has a shared memory space created using data_seg(\

Answer 1

Looks like you need a system-wide mutex that will protect your critical section of code (the code that mustn't run simultaneously). Making the function static has nothing to do with it, because it doesn't prevent different applications from running it at the same time.