2010-10-06 Ivan Maidanski <ivmai@mail.ru>

2010-10-06  Ivan Maidanski <ivmai@mail.ru>

	* darwin_stop_world.c (FindTopOfStack): Change return type to
	ptr_t (from long); make GC_INNER; add GC_ prefix.
	* darwin_stop_world.c (GC_push_all_stacks): Add thread_blocked
	local variable (initialized from the corresponding GC_thread
	field unless GC_query_task_threads); add assertion that our
	thread is not blocked; prefix FindTopOfStack with GC_ and remove
	no longer needed cast to ptr_t of the result; handle thread
	blocked case (and remove FIXME); use GC_push_all_stack_sections
	unless GC_query_task_threads (and remove FIXME).
	* pthread_support.c (GC_FindTopOfStack): Declare (if needed).
	* pthread_support.c (GC_do_blocking_inner): Call
	GC_save_regs_in_stack (if needed) before acquiring the lock.
	* win32_threads.c (GC_do_blocking_inner): Ditto.
	* pthread_support.c (GC_do_blocking_inner): Set/clear topOfStack
	field of GC_thread (Darwin only).
	* include/private/pthread_support.h (GC_thread): Add topOfStack
	field for Darwin (unless DARWIN_DONT_PARSE_STACK).