Boost.Threads - once functions

From: williamkempf_at_[hidden]
Date: 2001-07-31 15:55:39

I've been reworking the tss type in Boost.Threads to be type safe (no 
void*) and manage the data lifetimes internally.  This is a royal 
pain on Win32 platforms for many reasons :(.

Any way, the implementation is going to require some initialization 
code that needs to be run only once even if multiple threads access 
the data after it's initialized.  POSIX uses pthread_once to do this, 
but there's no Win32 equivalent.  Instead, Win32 programmers are 
expected to make use of DllMain to handle this sort of initialization 
and tear down stuff.  There's obvious drawbacks to this approach and 
it's not portable in any event.  So the question is, does 
Boost.Threads need once functions, and if so what sort of interface 
should we put on it?

Bill Kempf