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Re: win32: Why exports of JNI_* symbols from _exe_ files
Danny Smith wrote:
>>>Removing __declspec(dllimport) from the declaration of foo in main.c fixes.
>>>Also, even if foo() does live in dll and has the __imp__ prefix, the
>>>dllimport attribute is not necessary and the fixup will occur in the dll.
>>
>>Yes, but isn't there a performance penalty to this?
>
>
> One thunk from foo to __imp__foo in the dll. How often
> are these functions called? If they were calls to some
> math function in the inner loop of extensive matrix math, I
> might be concerned. There is also a penalty for using the
> attribute: the address of *_imp__foo is not a constant, so can't
> be used in file scope initializers
BTW, these functions are used to intialise and query
JVMs. So they are not called that often (probably only
once).
Ranjit.
--
Ranjit Mathew Email: rmathew AT hotmail DOT com
Bangalore, INDIA. Web: http://ranjitmathew.tripod.com/