* pthread_stop_world.c (GC_suspend_handler): Redirect to suspension
routine if signal is received and thread is flagged SUSPENDED.
(suspend_self): New function.
(GC_suspend_thread): New function.
(GC_resume_thread): New function.
* include/gc.h (GC_suspend_thread): Declare.
(GC_resumet_thread): Declare.
* include/private/pthread_support.h (SUSPENDED): New GC_thread
flag.
From-SVN: r114869