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/ActiveResult.h

@@ -0,0 +1,495 @@
+//
+// ActiveResult.h
+//
+// Library: Foundation
+// Package: Threading
+// Module:  ActiveObjects
+//
+// Definition of the ActiveResult class.
+//
+// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_ActiveResult_INCLUDED
+#define Foundation_ActiveResult_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/Mutex.h"
+#include "Poco/Event.h"
+#include "Poco/RefCountedObject.h"
+#include "Poco/Exception.h"
+#include <algorithm>
+
+
+namespace Poco {
+
+
+template <class ResultType>
+class ActiveResultHolder: public RefCountedObject
+	/// This class holds the result of an asynchronous method
+	/// invocation. It is used to pass the result from the
+	/// execution thread back to the invocation thread. 
+	/// The class uses reference counting for memory management.
+	/// Do not use this class directly, use ActiveResult instead.
+{
+public:
+	ActiveResultHolder():
+		_pData(0),
+		_pExc(0),
+		_event(Event::EVENT_MANUALRESET)
+		/// Creates an ActiveResultHolder.
+	{
+	}
+		
+	ResultType& data()
+		/// Returns a reference to the actual result.
+	{
+		poco_check_ptr(_pData);
+		return *_pData;
+	}
+	
+	void data(ResultType* pData)
+	{
+		delete _pData;
+		_pData = pData;
+	}
+	
+	void wait()
+		/// Pauses the caller until the result becomes available.
+	{
+		_event.wait();
+	}
+	
+	bool tryWait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Returns true if the result became
+		/// available, false otherwise.
+	{
+		return _event.tryWait(milliseconds);
+	}
+	
+	void wait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Throws a TimeoutException if the
+		/// result did not became available.
+	{
+		_event.wait(milliseconds);
+	}
+	
+	void notify()
+		/// Notifies the invoking thread that the result became available.
+	{
+		_event.set();
+	}
+	
+	bool failed() const
+		/// Returns true if the active method failed (and threw an exception).
+		/// Information about the exception can be obtained by calling error().
+	{
+		return _pExc != 0;
+	}
+	
+	std::string error() const
+		/// If the active method threw an exception, a textual representation
+		/// of the exception is returned. An empty string is returned if the
+		/// active method completed successfully.
+	{
+		if (_pExc)
+			return _pExc->message();
+		else
+			return std::string();
+	}
+	
+	Exception* exception() const
+		/// If the active method threw an exception, a clone of the exception
+		/// object is returned, otherwise null.
+	{
+		return _pExc;
+	}
+	
+	void error(const Exception& exc)
+		/// Sets the exception.
+	{
+		delete _pExc;
+		_pExc = exc.clone();
+	}
+	
+	void error(const std::string& msg)
+		/// Sets the exception.
+	{
+		delete _pExc;
+		_pExc = new UnhandledException(msg);
+	}
+
+protected:
+	~ActiveResultHolder()
+	{
+		delete _pData;
+		delete _pExc;
+	}
+
+private:
+	ResultType* _pData;
+	Exception*  _pExc;
+	Event       _event;
+};
+
+
+
+template <>
+class ActiveResultHolder<void>: public RefCountedObject
+{
+public:
+	ActiveResultHolder():
+		_pExc(0),
+		_event(Event::EVENT_MANUALRESET)
+		/// Creates an ActiveResultHolder.
+	{
+	}
+	
+	void wait()
+		/// Pauses the caller until the result becomes available.
+	{
+		_event.wait();
+	}
+	
+	bool tryWait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Returns true if the result became
+		/// available, false otherwise.
+	{
+		return _event.tryWait(milliseconds);
+	}
+	
+	void wait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Throws a TimeoutException if the
+		/// result did not became available.
+	{
+		_event.wait(milliseconds);
+	}
+	
+	void notify()
+		/// Notifies the invoking thread that the result became available.
+	{
+		_event.set();
+	}
+	
+	bool failed() const
+		/// Returns true if the active method failed (and threw an exception).
+		/// Information about the exception can be obtained by calling error().
+	{
+		return _pExc != 0;
+	}
+	
+	std::string error() const
+		/// If the active method threw an exception, a textual representation
+		/// of the exception is returned. An empty string is returned if the
+		/// active method completed successfully.
+	{
+		if (_pExc)
+			return _pExc->message();
+		else
+			return std::string();
+	}
+	
+	Exception* exception() const
+		/// If the active method threw an exception, a clone of the exception
+		/// object is returned, otherwise null.
+	{
+		return _pExc;
+	}
+	
+	void error(const Exception& exc)
+		/// Sets the exception.
+	{
+		delete _pExc;
+		_pExc = exc.clone();
+	}
+	
+	void error(const std::string& msg)
+		/// Sets the exception.
+	{
+		delete _pExc;
+		_pExc = new UnhandledException(msg);
+	}
+
+protected:
+	~ActiveResultHolder()
+	{
+		delete _pExc;
+	}
+
+private:
+	Exception*  _pExc;
+	Event       _event;
+};
+
+
+template <class RT>
+class ActiveResult
+	/// This class holds the result of an asynchronous method
+	/// invocation (see class ActiveMethod). It is used to pass the 
+	/// result from the execution thread back to the invocation thread. 
+{
+public:
+	typedef RT ResultType;
+	typedef ActiveResultHolder<ResultType> ActiveResultHolderType;
+
+	ActiveResult(ActiveResultHolderType* pHolder):
+		_pHolder(pHolder)
+		/// Creates the active result. For internal use only.
+	{
+		poco_check_ptr (pHolder);
+	}
+	
+	ActiveResult(const ActiveResult& result)
+		/// Copy constructor.
+	{
+		_pHolder = result._pHolder;
+		_pHolder->duplicate();
+	}
+	
+	~ActiveResult()
+		/// Destroys the result.
+	{
+		_pHolder->release();
+	}
+	
+	ActiveResult& operator = (const ActiveResult& result)
+		/// Assignment operator.
+	{
+		ActiveResult tmp(result);
+		swap(tmp);
+		return *this;
+	}
+	
+	void swap(ActiveResult& result)
+	{
+		using std::swap;
+		swap(_pHolder, result._pHolder);
+	}
+	
+	ResultType& data() const
+		/// Returns a reference to the result data.
+	{
+		return _pHolder->data();
+	}
+	
+	void data(ResultType* pValue)
+	{
+		_pHolder->data(pValue);
+	}
+	
+	void wait()
+		/// Pauses the caller until the result becomes available.
+	{
+		_pHolder->wait();
+	}
+	
+	bool tryWait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Returns true if the result became
+		/// available, false otherwise.
+	{
+		return _pHolder->tryWait(milliseconds);
+	}
+	
+	void wait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Throws a TimeoutException if the
+		/// result did not became available.
+	{
+		_pHolder->wait(milliseconds);
+	}
+	
+	bool available() const
+		/// Returns true if a result is available.
+	{
+		return _pHolder->tryWait(0);
+	}
+	
+	bool failed() const
+		/// Returns true if the active method failed (and threw an exception).
+		/// Information about the exception can be obtained by calling error().
+	{
+		return _pHolder->failed();
+	}
+	
+	std::string error() const
+		/// If the active method threw an exception, a textual representation
+		/// of the exception is returned. An empty string is returned if the
+		/// active method completed successfully.
+	{
+		return _pHolder->error();
+	}
+
+	Exception* exception() const
+		/// If the active method threw an exception, a clone of the exception
+		/// object is returned, otherwise null.
+	{
+		return _pHolder->exception();
+	}
+
+	void notify()
+		/// Notifies the invoking thread that the result became available.
+		/// For internal use only.
+	{
+		_pHolder->notify();
+	}
+	
+	ResultType& data()
+		/// Returns a non-const reference to the result data. For internal
+		/// use only.
+	{
+		return _pHolder->data();
+	}
+	
+	void error(const std::string& msg)
+		/// Sets the failed flag and the exception message.
+	{
+		_pHolder->error(msg);
+	}
+
+	void error(const Exception& exc)
+		/// Sets the failed flag and the exception message.
+	{
+		_pHolder->error(exc);
+	}
+	
+private:
+	ActiveResult();
+
+	ActiveResultHolderType* _pHolder;
+};
+
+
+
+template <>
+class ActiveResult<void>
+	/// This class holds the result of an asynchronous method
+	/// invocation (see class ActiveMethod). It is used to pass the 
+	/// result from the execution thread back to the invocation thread. 
+{
+public:
+	typedef ActiveResultHolder<void> ActiveResultHolderType;
+
+	ActiveResult(ActiveResultHolderType* pHolder):
+		_pHolder(pHolder)
+		/// Creates the active result. For internal use only.
+	{
+		poco_check_ptr (pHolder);
+	}
+	
+	ActiveResult(const ActiveResult& result)
+		/// Copy constructor.
+	{
+		_pHolder = result._pHolder;
+		_pHolder->duplicate();
+	}
+	
+	~ActiveResult()
+		/// Destroys the result.
+	{
+		_pHolder->release();
+	}
+	
+	ActiveResult& operator = (const ActiveResult& result)
+		/// Assignment operator.
+	{
+		ActiveResult tmp(result);
+		swap(tmp);
+		return *this;
+	}
+	
+	void swap(ActiveResult& result)
+	{
+		using std::swap;
+		swap(_pHolder, result._pHolder);
+	}
+	
+	void wait()
+		/// Pauses the caller until the result becomes available.
+	{
+		_pHolder->wait();
+	}
+	
+	bool tryWait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Returns true if the result became
+		/// available, false otherwise.
+	{
+		return _pHolder->tryWait(milliseconds);
+	}
+	
+	void wait(long milliseconds)
+		/// Waits up to the specified interval for the result to
+		/// become available. Throws a TimeoutException if the
+		/// result did not became available.
+	{
+		_pHolder->wait(milliseconds);
+	}
+	
+	bool available() const
+		/// Returns true if a result is available.
+	{
+		return _pHolder->tryWait(0);
+	}
+	
+	bool failed() const
+		/// Returns true if the active method failed (and threw an exception).
+		/// Information about the exception can be obtained by calling error().
+	{
+		return _pHolder->failed();
+	}
+	
+	std::string error() const
+		/// If the active method threw an exception, a textual representation
+		/// of the exception is returned. An empty string is returned if the
+		/// active method completed successfully.
+	{
+		return _pHolder->error();
+	}
+
+	Exception* exception() const
+		/// If the active method threw an exception, a clone of the exception
+		/// object is returned, otherwise null.
+	{
+		return _pHolder->exception();
+	}
+
+	void notify()
+		/// Notifies the invoking thread that the result became available.
+		/// For internal use only.
+	{
+		_pHolder->notify();
+	}
+	
+	void error(const std::string& msg)
+		/// Sets the failed flag and the exception message.
+	{
+		_pHolder->error(msg);
+	}
+
+	void error(const Exception& exc)
+		/// Sets the failed flag and the exception message.
+	{
+		_pHolder->error(exc);
+	}
+	
+private:
+	ActiveResult();
+
+	ActiveResultHolderType* _pHolder;
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_ActiveResult_INCLUDED