2012-06-11 Pedro Alves <palves@redhat.com>

2012-06-11  Pedro Alves  <palves@redhat.com>

	* ser-base.c (run_async_handler_and_reschedule): New.
	(fd_event, push_event): Use it.
	* serial.c (serial_open, serial_fdopen_ops): Set the initial
	reference count to 1.
	(do_serial_close): Set the bufp field to NULL.  Use serial_unref
	instead of xfree.
	(serial_is_open, serial_ref, serial_unref): New.
	* serial.h (serial_open): Adjust comment.
	(serial_is_open): Declare.
	(serial_close): Adjust comment.
	(serial_ref, serial_unref) Declare.
	(struct serial): New field 'refcnt'.