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* dcrt0.cc (do_exit): Just set exit_state to ES_EVENTS_TERMINATE and nuke call to events_terminate which just set a superfluous flag. * sigproc.cc (signal_exit_code): New variable. (setup_signal_exit): Define new function. (_cygtls::signal_exit): Remove accommodations for closing the signal pipe handle. (exit_thread): Just sleep if we're exiting. (wait_sig): If signal_exit_code is set, just handle bookkeeping signals and exit ReadFile loop if there is nothing more to process. Call signal_exit at end if signal_exit_code is non-zero. * sigproc.h (setup_signal_exit): Declare new function. * exceptions.cc (sigpacket::process): Use setup_signal_exit to control exiting due to a signal. (exception::handle): Ditto. Query exit_state rather than defunct exit_already to determine if we are exiting. * globals.cc (ES_SIGNAL_EXIT): New enum. * sync.h (lock_process::release): New function for explicitly unlocking muto. (lock_process::~lock_process): Use release method.
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