Fix race condition when waiting for a signal
* cygtls.h (_cygtls::wait_signal_arrived): Renamed from set_signal_arrived. (_cygtls::set_signal_arrived): New function signalling signal_arrived. (_cygtls::reset_signal_arrived): Don't reset will_wait_for_signal. (_cygtls::unwait_signal_arrived): New function only resetting will_wait_for_signal. (class wait_signal_arrived): Rename from set_signal_arrived. Accommodate name change throughout Cygwin. (wait_signal_arrived::~wait_signal_arrived): Call _cygtls::unwait_signal_arrived. Add comment. * cygserver_ipc.h (ipc_set_proc_info): Fetch signal_arrived handle via call to _cygtls::get_signal_arrived. * exceptions.cc (_cygtls::interrupt_setup): Signal signal_arrived via call to _cygtls::set_signal_arrived. (_cygtls::handle_SIGCONT): Ditto. * fhandler_socket.cc (fhandler_socket::wait_for_events): Generate WSAEVENT array prior to entering wait loop. Add cancel event object if available. Remove calls to pthread_testcancel and just call pthread::static_cancel_self if the cancel event object is signalled. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
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@ -40,7 +40,7 @@ cygwait (HANDLE object, PLARGE_INTEGER timeout, unsigned mask)
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if (object)
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wait_objects[num++] = object;
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set_signal_arrived thread_waiting (is_cw_sig_handle, wait_objects[num]);
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wait_signal_arrived thread_waiting (is_cw_sig_handle, wait_objects[num]);
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debug_only_printf ("object %p, thread waiting %d, signal_arrived %p", object, (int) thread_waiting, _my_tls.signal_arrived);
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DWORD sig_n;
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if (!thread_waiting)
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