As I know, C inline function body should be defined in .h file because it causes an error 'function-name used but never defined" if body defined in .c file.
Is this the regular way? Or how to define inline function body in .c file?
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A:
Each .c file is compiled independently into .o output. If you define the inline function in a .c file, other source files cannot see such function, so that cannot be inlined.
Therefore the inline function should be in the .h file to allow the code to be shared.
KennyTM
2010-05-02 06:25:23
Thanks! You're saving me a lot :)
Eonil
2010-05-02 06:27:27
Have you profiled your code to see if that function **needs** to be inlined, or is this a case of http://goo.gl/bquz ?
JUST MY correct OPINION
2010-05-02 06:30:32
@ttmrichter: (off topic) This is not twitter, there's no need to Premature Shorten the URL.
KennyTM
2010-05-02 06:40:21
@Eonil: Note that if an inline function is only ever used within one .c file then it can be defined as `static inline` within that .c file rather than in a .h file. Otherwise, as already stated, it needs to me made visible in a .h file.
Paul R
2010-05-02 07:36:49
@KennyTM: I'm sure that is a good witticism, but I'm not positive what you mean. (I don't do the twitting thing, so if it relies on knowing specifics of twitting it will definitely fly over my head.)
JUST MY correct OPINION
2010-05-02 11:13:54
@ttmrichter: What I mean is you can enter 600 characters here so you can just post the whole URL http://c2.com/cgi/wiki?PrematureOptimization.
KennyTM
2010-05-02 12:00:56
@KennyTM: Ah. I see what you mean. I do the whole URL-squishing thing by default these days because so many URLs are hundreds of characters long. It's just motor memory. :)
JUST MY correct OPINION
2010-05-02 12:35:44