Does it makes sense to define an inline function which makes calls to other function(s)?

Question

From what I know an inline function is an optimization to enhance performance, thus it should run as fast as a macro. Inline function's code should be as short as possible.

I wonder if it make sense to embed functions calls inside an inline function. If the answer is yes, in which context and what are the restrictions?

Actually, I am asking this question because I looked at a code of someone who is calling functions such as "socket()", "sendto()" and "memset()" from inline functions; something that overrides the purpose of an inline function in my opinion.

Note: In the code I have there is no use of any conditional calls to the functions, the inline function just passes arguments to the called functions.

Answer 1

I wonder if it make sense to embed functions calls inside an inline function.

Of course it does. Inlining a call to your function is still an optimisation, removing the cost of that function call and allowing further optimisations in the context of the calling function, whether or not it in turn calls other functions.

in which context and what are the restrictions?

I've no idea what you mean by "context"; but there are no restrictions on what you can do in an inline function. The only semantic effects of declaring a function inline are to allow multiple identical definitions of the, and require a definition in any translation unit that uses the function. In all other respects, it's the same as any other function definition.