start move to interruption of blocking calls, PIThread and PIEthernet

libs/main/thread/pithread.cpp

@@ -23,6 +23,9 @@
 #ifndef MICRO_PIP
 #  include "pisystemtests.h"
 #endif
+#ifdef WINDOWS
+#  include <ioapiset.h>
+#endif
 #include <signal.h>
 #if defined(WINDOWS)
 #  define __THREAD_FUNC_RET__ uint __stdcall
@@ -591,6 +594,26 @@ PIThread::~PIThread() {
 }
 
 
+#ifdef WINDOWS
+NTAPI void winThreadAPC(ULONG_PTR) {
+	//piCout << "APC";
+}
+#endif
+
+void PIThread::interrupt() {
+	if (PRIVATE->thread == 0) return;
+	piCout << "PIThread::interrupt";
+#ifdef WINDOWS
+	CancelSynchronousIo(PRIVATE->thread);
+	QueueUserAPC(winThreadAPC, PRIVATE->thread, 0);
+#else
+#  ifdef POSIX_SIGNALS
+	pthread_kill(PRIVATE->thread, SIGUSR2);
+#  endif
+#endif
+}
+
+
 void PIThread::stop(bool wait) {
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "stop ..." << running_ << wait;
 	terminating = true;