2007-02-19  Dave Brolley  <brolley@redhat.com>

	* sidblockingutil.h (sidutil::blocking_component): Remove
	child_resume_mutex, child_stopped_mutex, chiuld_resume_condition and
	child_stopped_condition. Use a single mutex/condition pair:
	child_sync_mutex and child_sync_condition. Handle spontaneous returns
	from pthread_cond_wait.
	(control_status): Now volatile.