* DevNotes: Add entry cgf-000017.

* _cygtls.cc (_cygtls::call2): Use new exit_thread function in place of
ExitThread.
* miscfuncs.cc (thread_wrapper): Ditto.
* thread.cc (pthread::exit): Ditto.
(pthread_mutex::unlock): Set tid to NULL rather than 0.
(pthread_spinlock::unlock): Ditto.
* pinfo.cc (commune_process): Actually call lock_process constructor.
* sigproc.cc (exit_thread): New function.
(wait_sig): Handle __SIGTHREADEXIT case.  Don't just block rather than
returning from this function.
* sigproc.h (__SIGTHREADEXIT): New enum.
(exit_thread): Declare.
* sync.cc (muto::release): Accept a tls command-line argument.
* sync.h (muto::release): Accept a tls command-line parameter.  Default to
&_my_tls.

winsup/cygwin/sync.cc

@@ -4,7 +4,8 @@
    which is intended to operate similarly to a mutex but attempts to
    avoid making expensive calls to the kernel.
 
-   Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2010 Red Hat, Inc.
+   Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2010, 2011, 2012
+   Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -109,10 +110,8 @@ muto::acquired ()
 
 /* Return the muto lock.  Needs to be called once per every acquire. */
 int
-muto::release ()
+muto::release (_cygtls *this_tls)
 {
-  void *this_tls = &_my_tls;
-
   if (tls != this_tls || !visits)
     {
       SetLastError (ERROR_NOT_OWNER);	/* Didn't have the lock. */