CODEWITHSUNDEEP
c++optimization
Antonin GAVREL
Antonin GAVREL

Reputation: 11219

What is 'really_inline' exactly?

While browsing github I stumbled on "really_inline" keyword and I was wondering what is it exactly?

Obviously, if it lives by its name, it makes 100% sure to embed the function and remove the caller/callee in the assembly output, but I want to know if it is specific to any compiler or else and how is this done.

Upvotes: 1

Views: 252

Answers (1)

anthony sottile
anthony sottile

Reputation: 69864

in this case it's a macro -- simdjson defines it conditionally on whether it is msvc:

here (msvc):

  #define really_inline __forceinline

and here (not msvc):

  #define really_inline inline __attribute__((always_inline, unused))

Upvotes: 3

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