hg: dio/dev: 8055674: OUTPUT_BUFFER_EMPTY event does not fire

[jen.dority at oracle.com]

Changeset: 44692fd6565d
Author:    jld
Date:      2014-08-27 10:14 -0400
URL:       http://hg.openjdk.java.net/dio/dev/rev/44692fd6565d

8055674: OUTPUT_BUFFER_EMPTY event does not fire
Summary: Fixed OUTPUT_BUFFER_EMPTY to fire even when writing an empty buffer. Fixed other issues keeping uart events from working properly.
Reviewed-by: alkonsta

! src/se/classes/com/oracle/dio/uart/impl/UARTEventHandler.java
! src/se/native/com/oracle/dio/uart/impl/jni_signal_dispatcher.cpp
! src/se/native/com/oracle/dio/uart/impl/jni_uart.cpp
! src/share/linux/native/com/oracle/dio/uart/serial.c
! src/share/linux/native/com/oracle/dio/uart/uart.c