Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Foundation/include/Poco/Event_POSIX.h

@@ -0,0 +1,77 @@
+//
+// Event_POSIX.h
+//
+// Library: Foundation
+// Package: Threading
+// Module:  Event
+//
+// Definition of the EventImpl class for POSIX Threads.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_Event_POSIX_INCLUDED
+#define Foundation_Event_POSIX_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/Exception.h"
+#include <pthread.h>
+#include <errno.h>
+
+
+namespace Poco {
+
+
+class Foundation_API EventImpl
+{
+protected:
+	EventImpl(bool autoReset);		
+	~EventImpl();
+	void setImpl();
+	void waitImpl();
+	bool waitImpl(long milliseconds);
+	void resetImpl();
+	
+private:
+	bool            _auto;
+	volatile bool   _state;
+	pthread_mutex_t _mutex;
+	pthread_cond_t  _cond;
+};
+
+
+//
+// inlines
+//
+inline void EventImpl::setImpl()
+{
+	if (pthread_mutex_lock(&_mutex))	
+		throw SystemException("cannot signal event (lock)");
+	_state = true;
+	if (pthread_cond_broadcast(&_cond))
+	{
+		pthread_mutex_unlock(&_mutex);
+		throw SystemException("cannot signal event");
+	}
+	pthread_mutex_unlock(&_mutex);
+}
+
+
+inline void EventImpl::resetImpl()
+{
+	if (pthread_mutex_lock(&_mutex))	
+		throw SystemException("cannot reset event");
+	_state = false;
+	pthread_mutex_unlock(&_mutex);
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_Event_POSIX_INCLUDED