Re: Collation patch's handling of wcstombs/mbstowcs is sheerest fantasy

On lör, 2011-04-23 at 11:37 -0400, Tom Lane wrote:
> I wrote:
> > * Where they're not, install the locale_t with uselocale(), do
> > mbstowcs or wcstombs, and revert to the former locale_t setting.
> > This is ugly as sin, and not thread-safe, but of course lots of
> > the backend is not thread-safe.
>
> I've been corrected on that: uselocale() *is* thread safe, at least in
> glibc (it only affects the locale used by the current thread). And it's
> "only a few instructions" according to Jakub Jelinek. So a temporary
> setting via uselocale is exactly what you're supposed to do for any
> locale-sensitive function that hasn't got a *_l variant.

Good to know. It was certainly very strange, this gap in the API.