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From: Michael Glassford (glassfordm_at_[hidden])
Date: 2004-08-04 09:50:47

Roland wrote:

> On Wed, 04 Aug 2004 08:51:35 -0400 Michael Glassford <glassfordm_at_[hidden]> wrote:
>>Thanks, that did turn out to be the problem. It works fine, now, which
>>is really good news.
> Fine.
> I am currently trying to unify both versions (7 and 6). This also seems to be necessary,
> because Aarons code while paving the way yet has some minor problems (also on vc7):
> While it is very interesting, that it is not mainCRTStartup which is the very first function
> of the executable that receives control, it may be problematic in our case.
> I disbelieve that the threading library is prepared to be the very first in town (not
> even the EXE's entry point has been called yet!) and so I think it is much safer to
> initalize everything after the runtime system is up, but before main.

Having experimented a bit and thought a bit, here's my take on how this
could work:

1) Functions on_process_enter() and on_thread_enter() are unnecessary.

2) DllMain() and tls_callback() are needed only to call on_thread_exit().

3) Function at_thread_exit() schedules a tss cleanup task that needs to
be run for a thread that uses tss. The first time it is executed it also


to schedule cleanup for the main thread before destructors of global
objects are run and to schedule on_process_exit() (which calls TlsFree()).

4) In addition, to provide some cleanup support for compilers that don't
yet have tls_callback() support, the thread class continues to call
on_thread_exit() after the thread function exits for threads created by

This should make unification of the VC++ 7.1 and 6 versions easier; the
only difference would be the startup code needed to call
on_tls_prepare(), I believe.


Also, I was wondering: has anyone tried this on VC++ 7.0?


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