nanogui: Thread: thread safety

:  It is my opinion that having the pthreads dependency is something that
: may come back and haunt us.  Thats why I would recommend biting the
: bullet and doing it ourselves.

There is no pthreads dependency.  As I mentioned, the version 
I just checked into CVS uses pthread_mutex_lock and
pthread_mutex_unlock, which are in glibc.

Also, src/include/lock.h defines three macros which can be used
to implement locks any way desired - just redefine the macros.

Regards,

Greg