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/Thread.h

@@ -0,0 +1,385 @@
+//
+// Thread.h
+//
+// Library: Foundation
+// Package: Threading
+// Module:  Thread
+//
+// Definition of the Thread class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_Thread_INCLUDED
+#define Foundation_Thread_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/Event.h"
+#include "Poco/Mutex.h"
+
+
+#if defined(POCO_OS_FAMILY_WINDOWS)
+#if defined(_WIN32_WCE)
+#include "Poco/Thread_WINCE.h"
+#else
+#include "Poco/Thread_WIN32.h"
+#endif
+#elif defined(POCO_VXWORKS)
+#include "Poco/Thread_VX.h"
+#else
+#include "Poco/Thread_POSIX.h"
+#endif
+
+
+namespace Poco {
+
+
+class Runnable;
+class ThreadLocalStorage;
+
+
+class Foundation_API Thread: private ThreadImpl
+	/// This class implements a platform-independent
+	/// wrapper to an operating system thread.
+	///
+	/// Every Thread object gets a unique (within
+	/// its process) numeric thread ID.
+	/// Furthermore, a thread can be assigned a name.
+	/// The name of a thread can be changed at any time.
+{
+public:
+	typedef ThreadImpl::TIDImpl TID;
+
+	using ThreadImpl::Callable;
+
+	enum Priority
+		/// Thread priorities.
+	{
+		PRIO_LOWEST  = PRIO_LOWEST_IMPL, /// The lowest thread priority.
+		PRIO_LOW     = PRIO_LOW_IMPL,    /// A lower than normal thread priority.
+		PRIO_NORMAL  = PRIO_NORMAL_IMPL, /// The normal thread priority.
+		PRIO_HIGH    = PRIO_HIGH_IMPL,   /// A higher than normal thread priority.
+		PRIO_HIGHEST = PRIO_HIGHEST_IMPL /// The highest thread priority.
+	};
+
+	enum Policy
+	{
+		POLICY_DEFAULT = POLICY_DEFAULT_IMPL
+	};
+
+	Thread();
+		/// Creates a thread. Call start() to start it.
+
+	Thread(const std::string& name);
+		/// Creates a named thread. Call start() to start it.
+
+	~Thread();
+		/// Destroys the thread.
+
+	int id() const;
+		/// Returns the unique thread ID of the thread.
+
+	TID tid() const;
+		/// Returns the native thread ID of the thread.
+
+	std::string name() const;
+		/// Returns the name of the thread.
+
+	std::string getName() const;
+		/// Returns the name of the thread.
+
+	void setName(const std::string& name);
+		/// Sets the name of the thread.
+
+	void setPriority(Priority prio);
+		/// Sets the thread's priority.
+		///
+		/// Some platform only allow changing a thread's priority
+		/// if the process has certain privileges.
+
+	Priority getPriority() const;
+		/// Returns the thread's priority.
+
+	void setOSPriority(int prio, int policy = POLICY_DEFAULT);
+		/// Sets the thread's priority, using an operating system specific
+		/// priority value. Use getMinOSPriority() and getMaxOSPriority() to
+		/// obtain mininum and maximum priority values. Additionally,
+		/// a scheduling policy can be specified. The policy is currently
+		/// only used on POSIX platforms where the values SCHED_OTHER (default),
+		/// SCHED_FIFO and SCHED_RR are supported.
+
+	int getOSPriority() const;
+		/// Returns the thread's priority, expressed as an operating system
+		/// specific priority value.
+		///
+		/// May return 0 if the priority has not been explicitly set.
+
+	static int getMinOSPriority(int policy = POLICY_DEFAULT);
+		/// Returns the minimum operating system-specific priority value,
+		/// which can be passed to setOSPriority() for the given policy.
+
+	static int getMaxOSPriority(int policy = POLICY_DEFAULT);
+		/// Returns the maximum operating system-specific priority value,
+		/// which can be passed to setOSPriority() for the given policy.
+
+	void setStackSize(int size);
+		/// Sets the thread's stack size in bytes.
+		/// Setting the stack size to 0 will use the default stack size.
+		/// Typically, the real stack size is rounded up to the nearest
+		/// page size multiple.
+
+	int getStackSize() const;
+		/// Returns the thread's stack size in bytes.
+		/// If the default stack size is used, 0 is returned.
+
+	void start(Runnable& target);
+		/// Starts the thread with the given target.
+		///
+		/// Note that the given Runnable object must remain
+		/// valid during the entire lifetime of the thread, as
+		/// only a reference to it is stored internally.
+
+	void start(Poco::SharedPtr<Runnable> pTarget);
+		/// Starts the thread with the given target.
+		///
+		/// The Thread ensures that the given target stays
+		/// alive while the thread is running.
+
+	void start(Callable target, void* pData = 0);
+		/// Starts the thread with the given target and parameter.
+
+	template <class Functor>
+	void startFunc(const Functor& fn)
+		/// Starts the thread with the given functor object or lambda.
+	{
+		startImpl(new FunctorRunnable<Functor>(fn));
+	}
+
+	template <class Functor>
+	void startFunc(Functor&& fn)
+		/// Starts the thread with the given functor object or lambda.
+	{
+		startImpl(new FunctorRunnable<Functor>(std::move(fn)));
+	}
+
+	void join();
+		/// Waits until the thread completes execution.
+		/// If multiple threads try to join the same
+		/// thread, the result is undefined.
+
+	void join(long milliseconds);
+		/// Waits for at most the given interval for the thread
+		/// to complete. Throws a TimeoutException if the thread
+		/// does not complete within the specified time interval.
+
+	bool tryJoin(long milliseconds);
+		/// Waits for at most the given interval for the thread
+		/// to complete. Returns true if the thread has finished,
+		/// false otherwise.
+
+	bool isRunning() const;
+		/// Returns true if the thread is running.
+
+	static bool trySleep(long milliseconds);
+		/// Starts an interruptible sleep. When trySleep() is called,
+		/// the thread will remain suspended until:
+		///   - the timeout expires or
+		///   - wakeUp() is called
+		///
+		/// Function returns true if sleep attempt was completed, false
+		/// if sleep was interrupted by a wakeUp() call.
+		/// A frequent scenario where trySleep()/wakeUp() pair of functions
+		/// is useful is with threads spending most of the time idle,
+		/// with periodic activity between the idle times; trying to sleep
+		/// (as opposed to sleeping) allows immediate ending of idle thread
+		/// from the outside.
+		///
+		/// The trySleep() and wakeUp() calls should be used with
+		/// understanding that the suspended state is not a true sleep,
+		/// but rather a state of waiting for an event, with timeout
+		/// expiration. This makes order of calls significant; calling
+		/// wakeUp() before calling trySleep() will prevent the next
+		/// trySleep() call to actually suspend the thread (which, in
+		/// some scenarios, may be desirable behavior).
+
+	void wakeUp();
+		/// Wakes up the thread which is in the state of interruptible
+		/// sleep. For threads that are not suspended, calling this
+		/// function has the effect of preventing the subsequent
+		/// trySleep() call to put thread in a suspended state.
+
+	static void sleep(long milliseconds);
+		/// Suspends the current thread for the specified
+		/// amount of time.
+
+	static void yield();
+		/// Yields cpu to other threads.
+
+	static Thread* current();
+		/// Returns the Thread object for the currently active thread.
+		/// If the current thread is the main thread, 0 is returned.
+
+ 	static TID currentTid();
+ 		/// Returns the native thread ID for the current thread.
+
+protected:
+	ThreadLocalStorage& tls();
+		/// Returns a reference to the thread's local storage.
+
+	void clearTLS();
+		/// Clears the thread's local storage.
+
+	std::string makeName();
+		/// Creates a unique name for a thread.
+
+	static int uniqueId();
+		/// Creates and returns a unique id for a thread.
+
+	template <class Functor>
+	class FunctorRunnable: public Runnable
+	{
+	public:
+		FunctorRunnable(const Functor& functor):
+			_functor(functor)
+		{
+		}
+
+		FunctorRunnable(Functor&& functor):
+			_functor(std::move(functor))
+		{
+		}
+
+		~FunctorRunnable()
+		{
+		}
+
+		void run()
+		{
+			_functor();
+		}
+
+	private:
+		Functor _functor;
+	};
+
+private:
+	Thread(const Thread&);
+	Thread& operator = (const Thread&);
+
+	int                 _id;
+	std::string         _name;
+	ThreadLocalStorage* _pTLS;
+	Event               _event;
+	mutable FastMutex   _mutex;
+
+	friend class ThreadLocalStorage;
+	friend class PooledThread;
+};
+
+
+//
+// inlines
+//
+inline Thread::TID Thread::tid() const
+{
+	return tidImpl();
+}
+
+
+inline int Thread::id() const
+{
+	return _id;
+}
+
+
+inline std::string Thread::name() const
+{
+	FastMutex::ScopedLock lock(_mutex);
+
+	return _name;
+}
+
+
+inline std::string Thread::getName() const
+{
+	FastMutex::ScopedLock lock(_mutex);
+
+	return _name;
+}
+
+
+inline bool Thread::isRunning() const
+{
+	return isRunningImpl();
+}
+
+
+inline void Thread::sleep(long milliseconds)
+{
+	sleepImpl(milliseconds);
+}
+
+
+inline void Thread::yield()
+{
+	yieldImpl();
+}
+
+
+inline Thread* Thread::current()
+{
+	return static_cast<Thread*>(currentImpl());
+}
+
+
+inline void Thread::setOSPriority(int prio, int policy)
+{
+	setOSPriorityImpl(prio, policy);
+}
+
+
+inline int Thread::getOSPriority() const
+{
+	return getOSPriorityImpl();
+}
+
+
+inline int Thread::getMinOSPriority(int policy)
+{
+	return ThreadImpl::getMinOSPriorityImpl(policy);
+}
+
+
+inline int Thread::getMaxOSPriority(int policy)
+{
+	return ThreadImpl::getMaxOSPriorityImpl(policy);
+}
+
+
+inline void Thread::setStackSize(int size)
+{
+	setStackSizeImpl(size);
+}
+
+
+inline int Thread::getStackSize() const
+{
+	return getStackSizeImpl();
+}
+
+
+inline Thread::TID Thread::currentTid()
+{
+	return currentTidImpl();
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_Thread_INCLUDED