Re: [Mingw-users] Porting localtime_r and gmtime_r

["Tor Lillqvist" <tml@xxxxxx>]

>  http://msdn2.microsoft.com/en-us/library/aa246456(VS.60).aspx

>   > gmtime, mktime, and localtime all use a single statically allocated tm
>   > structure for the conversion. Each call to one of these routines
>   > destroys the result of the previous call.

That is misleading. Even in the C runtime sources included with the
venerable MSVC6, gmtime uses thread-local storage for their buffer in
the multithreaded versions of the C runtime (i.e., including
msvcrt.dll). (localtime calls gmtime, and mktime calls gmtime and
localtime, they don't use any static or thread-local buffer of their
own as far as I could see.)

I would be surprised if this had been changed in some later version of
msvcrt.dll, or one of the other runtimes like msvcr80.dll. Certainly
in the C runtime sources included with MSVS8 and the Platform SDK "for
Windows Server 2003 R2" gmtime still uses thread-local storage.

--tml

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