Started playing with Wineserver on mingw/cygwin again

[Ulrich Weigand]

Eric Pouech wrote:

> among the things we have to take care of:
> - signals: signal, in current implementation, is sent to a thread. in 
> nptl, it's sent to the process. So, lots of thread control has to be 
> rewritten
> - in the same type of issues, getpid() now returns the same pid for all 
> threads in a same process. Most of Wine code relies on having a 
> different pid for each thread (this fix is needed, IIRC, for some 
> Solaris port)

I think this is mostly used to implement SuspendThread / ResumeThread, 
which cannot be portably implemented using the pthreads interface.  
I do not know how to solve this issue without relying on implementation
details ...

> from what I've seen, the LDT/GDT with nptl should be easier:
> - for Win32 processes, as Ulrich already wrote, we could got rid of LDT 
> (and only rely on GDT) for %fs and TEB allocation
> - for Win16 processes, we would still require LDT sharing across 
> pthreads, which I don't how it's handled right now

LDT sharing should not be a problem (there were bugs in kernels 2.0.x
w.r.t. that issue, but those are long since fixed).  The core problem 
with the LDT was that the LinuxThreads implementation used to allocate
entries with modify_ldt, and Wine would do the same, without any 
coordination between the two.  This is no longer a problem as the new
ntpl thread library does not use the LDT at all anymore.

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  weigand at informatik.uni-erlangen.de