[Python-Dev] Threading and callbacks - missing documentation

Thomas Heller thomas.heller@ion-tof.com
Fri, 12 Apr 2002 19:58:42 +0200

From: "Martin v. Loewis" <martin@v.loewis.de>
> "Thomas Heller" <thomas.heller@ion-tof.com> writes:
> > Can't you at least partly combine the advantages of 1 and 2 by using
> > thread local storage for the global variable? I have no idea if there
> > is a portable way to do this...
> That would work, but, as you already guess: there is no portable way
> to do this. If you can accept platform-specific code, this is a good
> idea.
[in another message]
> The pthreads equivalent of Windows TLS is
> pthread_getspecific/setspecific, so you could cover pthreads and Win32.

Normally I don't care too much about portable code, but in this case
(storing and retriving the current threadstate between calls to C code
and callbacks from C-code into Python code) the most benefits could
only be gained if the Python core and hopefully also extension developers
cooperated and used this method.

could be changed to store the threadstate in a global TLS area for
Windows and pthreads platforms?