C++: extern and inline functions

Question

I have a couple of files written in C, and I want them to be C++-compatible, so for my C headers I use;

#ifdef __cplusplus
extern "C" {
#endif

at the beginning of the file and of course

#ifdef __cplusplus
}
#endif

...at the end. But it seems to create problems with the 'inline' keyword. My solution is to simply remove the inline keyword for C++, but I guess it could have a bad effect on C++ programs (these functions are called gazillions of times).

Is there a better solution ?

Answer 1

If I understand correctly, I would do:

 #ifdef __cplusplus
 #define D_INLINE static
 extern "C" {
 #else
 #define D_INLINE inline
 #endif

And use the D_INLINE for the functions that I think should need inline. As delnan said, the compiler will optimize it anyway and the inline keyword is just a hint to the compiler that the programmer thinks that the compiler should inline the function. It doesn't force the compiler to inline the function.