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Re: [ts-7000] PEEK/POKE why inline?

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Subject: Re: [ts-7000] PEEK/POKE why inline?
From: David Hawkins <>
Date: Fri, 14 Sep 2007 16:25:43 -0700
Hiya,

> OK, this may be a dumb question, but why are the
> PEEK/POKE functions inline?

If they're single line functions, then thats why;
eliminate function call overhead.

> Would anything terrible happen if they weren't?

If they were defined as an inline function rather
than a macro, then you'd get both types depending
on compiler optimization; function call for no,
or minimal optimization, inline for higher optimization
(I think, or perhaps you need --noinline or something
like that).

> Could I stuff them into a library, for example, and
> use them elsewhere or do I to keep #include'ing as source?

Regardless you need a #include to pick-up a macro,
inline function, or function call. So not much
difference.

You will however get a performance hit for using
functions; just try a toggle I/O loop that uses
a function (with prolog and epilog) versus the
inlined calls. Actually, there's no need, its pretty
obvious that the function call will be slower.

Of course, if you turn optimization on the compiler
will probably inline it anyway ...

:)

Cheers,
Dave


 
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