Sharing struct between C and C++

[Yadrif]

I am attempting to use C code from C++ and am having trouble sharing a struct between the two languages.

Currently I am able to get everything to compile by defining the struct in both the C++ file and the C code. For example:

MyFile.cpp

extern "C" {
struct SomeStruct {
    short   One[904];
    short   two;
};
extern struct SomeStruct theStruct;
}
.
.
theStruct.two = 1;

defines.h

struct SomeStruct {
    short   One[904];
    short   two;
};
extern struct SomeStruct theStruct;

SomeCode.c

struct SomeStruct theStruct;
.
.
theStruct.two = 0;

There are other C files that use theStruct and they have

extern struct SomeStruct theStruct;

in them.

These snippets are from the real code with names changed but it shows what I currently have. I want to access the same variable of the struct type from both C++ and C.

I have been struggling with this for a while now and can get it to compile doing it this way but I am unsure if it is the correct way to do this.

Any help is greatly appreciated.

Thanks.