Re: [PATCH v2 1/1] Win32: simplify loading of DLL functions

> Dynamic loading of DLL functions is duplicated in several places in Git
> for Windows' source code.
>
> This patch adds a pair of macros to simplify the process: the
> DECLARE_PROC_ADDR(<dll>, <return-type>, <function-name>,
> ...<function-parameter-types>...) macro to be used at the beginning of a
> code block, and the INIT_PROC_ADDR(<function-name>) macro to call before
> using the declared function. The return value of the INIT_PROC_ADDR()
> call has to be checked; If it is NULL, the function was not found in the
> specified DLL.
>
> Example:
>
>         DECLARE_PROC_ADDR(kernel32.dll, BOOL, CreateHardLinkW,
>                           LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
>
>         if (!INIT_PROC_ADDR(CreateHardLinkW))
>                 return error("Could not find CreateHardLinkW() function";
>
> 	if (!CreateHardLinkW(source, target, NULL))
> 		return error("could not create hardlink from %S to %S",
> 			     source, target);
> 	return 0;
>
> Signed-off-by: Karsten Blees <blees@dcon.de>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>