initial import of sqlitex

dlls/sqlite/thread/BaseWorker.cpp

@@ -0,0 +1,249 @@
+#include "BaseWorker.h"
+
+BaseWorker::BaseWorker() : 
+	m_perFrame(SM_DEFAULT_THREADS_PER_FRAME),
+	m_state(Worker_Stopped)
+{
+}
+
+BaseWorker::~BaseWorker()
+{
+	if (m_state != Worker_Stopped || m_state != Worker_Invalid)
+		Stop(true);
+
+	if (m_ThreadQueue.size())
+		Flush(true);
+}
+
+void BaseWorker::MakeThread(IThread *pThread)
+{
+	ThreadParams pt;
+
+	pt.flags = Thread_AutoRelease;
+	pt.prio = ThreadPrio_Normal;
+
+	MakeThread(pThread, &pt);
+}
+
+IThreadHandle *BaseWorker::MakeThread(IThread *pThread, ThreadFlags flags)
+{
+	ThreadParams pt;
+
+	pt.flags = flags;
+	pt.prio = ThreadPrio_Normal;
+
+	return MakeThread(pThread, &pt);
+}
+
+IThreadHandle *BaseWorker::MakeThread(IThread *pThread, const ThreadParams *params)
+{
+	if (m_state != Worker_Running)
+		return NULL;
+
+	SWThreadHandle *swt = new SWThreadHandle(this, params, pThread);
+
+	AddThreadToQueue(swt);
+
+	return swt;
+}
+
+void BaseWorker::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
+{
+	max = ThreadPrio_Normal;
+	min = ThreadPrio_Normal;
+}
+
+unsigned int BaseWorker::Flush(bool flush_cancel)
+{
+	SWThreadHandle *swt;
+	unsigned int num = 0;
+
+	while ((swt=PopThreadFromQueue()) != NULL)
+	{
+		swt->m_state = Thread_Done;
+		if (!flush_cancel)
+			swt->pThread->RunThread(swt);
+		swt->pThread->OnTerminate(swt, flush_cancel);
+		if (swt->m_params.flags & Thread_AutoRelease)
+			delete swt;
+		num++;
+	}
+
+	return num;
+}
+
+SWThreadHandle *BaseWorker::PopThreadFromQueue()
+{
+	if (!m_ThreadQueue.size())
+		return NULL;
+
+	SourceHook::List<SWThreadHandle *>::iterator begin;
+	SWThreadHandle *swt;
+
+	begin = m_ThreadQueue.begin();
+	swt = (*begin);
+	m_ThreadQueue.erase(begin);
+
+	return swt;
+}
+
+void BaseWorker::AddThreadToQueue(SWThreadHandle *pHandle)
+{
+	m_ThreadQueue.push_back(pHandle);
+}
+
+unsigned int BaseWorker::GetMaxThreadsPerFrame()
+{
+	return m_perFrame;
+}
+
+WorkerState BaseWorker::GetStatus(unsigned int *threads)
+{
+	if (threads)
+		*threads = m_perFrame;
+
+	return m_state;
+}
+
+unsigned int BaseWorker::RunFrame()
+{
+	unsigned int done = 0;
+	unsigned int max = GetMaxThreadsPerFrame();
+	SWThreadHandle *swt = NULL;
+	IThread *pThread = NULL;
+
+	while (done < max)
+	{
+		if ((swt=PopThreadFromQueue()) == NULL)
+			break;
+		pThread = swt->pThread;
+		swt->m_state = Thread_Running;
+		pThread->RunThread(swt);
+		swt->m_state = Thread_Done;
+		pThread->OnTerminate(swt, false);
+		if (swt->m_params.flags & Thread_AutoRelease)
+			delete swt;
+		done++;
+	}
+
+	return done;
+}
+
+void BaseWorker::SetMaxThreadsPerFrame(unsigned int threads)
+{
+	m_perFrame = threads;
+}
+
+bool BaseWorker::Start()
+{
+	if (m_state != Worker_Invalid && m_state != Worker_Stopped)
+	{
+		return false;
+	}
+
+	m_state = Worker_Running;
+
+    return true;
+}
+
+bool BaseWorker::Stop(bool flush_cancel)
+{
+	if (m_state == Worker_Invalid || m_state == Worker_Stopped)
+		return false;
+
+	if (m_state == Worker_Paused)
+	{
+		if (!Unpause())
+			return false;
+	}
+
+	m_state = Worker_Stopped;
+	Flush(flush_cancel);
+
+	return true;
+}
+
+bool BaseWorker::Pause()
+{
+	if (m_state != Worker_Running)
+		return false;
+
+	m_state = Worker_Paused;
+
+	return true;
+}
+
+
+bool BaseWorker::Unpause()
+{
+	if (m_state != Worker_Paused)
+		return false;
+
+	m_state = Worker_Running;
+
+	return true;
+}
+
+/***********************
+ * THREAD HANDLE STUFF *
+ ***********************/
+
+void SWThreadHandle::DestroyThis()
+{
+	delete this;
+}
+
+void SWThreadHandle::GetParams(ThreadParams *p)
+{
+	*p = m_params;
+}
+
+ThreadPriority SWThreadHandle::GetPriority()
+{
+	return m_params.prio;
+}
+
+ThreadState SWThreadHandle::GetState()
+{
+	return m_state;
+}
+
+IThreadCreator *SWThreadHandle::Parent()
+{
+	return m_parent;
+}
+
+bool SWThreadHandle::SetPriority(ThreadPriority prio)
+{
+	if (m_params.prio != ThreadPrio_Normal)
+		return false;
+
+	m_params.prio = prio;
+
+	return true;
+}
+
+bool SWThreadHandle::Unpause()
+{
+	if (m_state != Thread_Paused)
+		return false;
+
+	m_state = Thread_Running;
+
+	return true;
+}
+
+bool SWThreadHandle::WaitForThread()
+{
+	return false;
+}
+
+SWThreadHandle::SWThreadHandle(IThreadCreator *parent, const ThreadParams *p, IThread *thread) : 
+	m_parent(parent), m_params(*p), pThread(thread), m_state(Thread_Paused)
+{
+}
+
+IThread *SWThreadHandle::GetThread()
+{
+	return pThread;
+}

dlls/sqlite/thread/BaseWorker.h

@@ -0,0 +1,72 @@
+#ifndef _INCLUDE_SOURCEMOD_BASEWORKER_H
+#define _INCLUDE_SOURCEMOD_BASEWORKER_H
+
+#include "sh_list.h"
+#include "ThreadSupport.h"
+
+#define SM_DEFAULT_THREADS_PER_FRAME	1
+
+class BaseWorker;
+
+//SW = Simple Wrapper
+class SWThreadHandle : public IThreadHandle
+{
+	friend class BaseWorker;
+public:
+	SWThreadHandle(IThreadCreator *parent, const ThreadParams *p, IThread *thread);
+	IThread *GetThread();
+public:
+	//NOTE: We don't support this by default.
+	//It's specific usage that'd require many mutexes
+	virtual bool WaitForThread();
+public:
+	virtual void DestroyThis();
+	virtual IThreadCreator *Parent();
+	virtual void GetParams(ThreadParams *ptparams);
+public:
+	//Priorities not supported by default.
+	virtual ThreadPriority GetPriority();
+	virtual bool SetPriority(ThreadPriority prio);
+public:
+	virtual ThreadState GetState();
+	virtual bool Unpause();
+private:
+	ThreadState m_state;
+	ThreadParams m_params;
+	IThreadCreator *m_parent;
+	IThread *pThread;
+};
+
+class BaseWorker : public IWorker
+{
+public:
+	BaseWorker();
+	virtual ~BaseWorker();
+public:	//IWorker
+	virtual unsigned int RunFrame();
+	//Controls the worker
+	virtual bool Pause();
+	virtual bool Unpause();
+	virtual bool Start();
+	virtual bool Stop(bool flush_cancel);
+	//Flushes out any remaining threads
+	virtual unsigned int Flush(bool flush_cancel);
+	//returns status and number of threads in queue
+	virtual WorkerState GetStatus(unsigned int *numThreads);
+public:	//IThreadCreator
+	virtual void MakeThread(IThread *pThread);
+	virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags);
+	virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params);
+	virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min);
+public:	//BaseWorker
+	virtual void AddThreadToQueue(SWThreadHandle *pHandle);
+	virtual SWThreadHandle *PopThreadFromQueue();
+	virtual void SetMaxThreadsPerFrame(unsigned int threads);
+	virtual unsigned int GetMaxThreadsPerFrame();
+protected:
+	SourceHook::List<SWThreadHandle *> m_ThreadQueue;
+	unsigned int m_perFrame;
+	volatile WorkerState m_state;
+};
+
+#endif //_INCLUDE_SOURCEMOD_BASEWORKER_H

dlls/sqlite/thread/IThreader.h

@@ -0,0 +1,222 @@
+#ifndef _INCLUDE_SOURCEMOD_THREADER_H
+#define _INCLUDE_SOURCEMOD_THREADER_H
+
+namespace SourceMod
+{
+	enum ThreadFlags
+	{
+		Thread_Default = 0,
+		//auto release handle on finish
+		//you are not guaranteed the handle for this is valid after
+		// calling MakeThread(), so never use it until OnTerminate is called.
+		Thread_AutoRelease = 1,
+		//Thread is created "suspended", meaning
+		// it is inactive until unpaused.
+		Thread_CreateSuspended = 2,
+	};
+
+	enum ThreadPriority
+	{
+		ThreadPrio_Minimum = -8,
+		ThreadPrio_Low = -3,
+		ThreadPrio_Normal = 0,
+		ThreadPrio_High = 3,
+		ThreadPrio_Maximum = 8,
+	};
+
+	enum ThreadState
+	{
+		Thread_Running = 0,
+		Thread_Paused = 1,
+		Thread_Done = 2,
+	};
+
+	struct ThreadParams
+	{
+		ThreadParams() : 
+			flags(Thread_Default), 
+			prio(ThreadPrio_Normal)
+		{
+		};
+		ThreadFlags flags;
+		ThreadPriority prio;
+	};
+
+	class IThreadCreator;
+
+	/**
+	 * Describes a handle to a thread
+	 */
+	class IThreadHandle
+	{
+	public:
+		virtual ~IThreadHandle() { };
+	public:
+		/**
+		 * Pauses parent thread until this thread completes.
+		 */
+		virtual bool WaitForThread() =0;
+		/**
+		 * Destroys the thread handle.
+		 * This will not necessarily cancel the thread.
+		 */
+		virtual void DestroyThis() =0;
+		/**
+		 * Returns the parent threader.
+		 */
+		virtual IThreadCreator *Parent() =0;
+		/**
+		 * Returns the thread states.
+		 */
+		virtual void GetParams(ThreadParams *ptparams) =0;
+		/**
+		 * Returns priority
+		 */
+		virtual ThreadPriority GetPriority() =0;
+		/**
+		 * Sets thread priority
+		 */
+		virtual bool SetPriority(ThreadPriority prio) =0;
+		/**
+		 * Gets thread state
+		 */
+		virtual ThreadState GetState() =0;
+		/**
+		 * Attempts to unpause a paused thread.
+		 */
+		virtual bool Unpause() =0;
+	};
+
+	/**
+	 * Describes a single unit of execution/context flow
+	 */
+	class IThread
+	{
+	public:
+		//Called when the thread runs
+		virtual void RunThread(IThreadHandle *pHandle) =0;
+		//Called when the thread terminates.
+		//"Cancel" is true if the thread did not finish
+		//(this could mean suspended or terminated abruptly)
+		virtual void OnTerminate(IThreadHandle *pHandle, bool cancel) =0;
+	};
+
+
+	/**
+	 * Describes a thread creator
+	 */
+	class IThreadCreator
+	{
+	public:
+		//Makes a thread and cleans up the handle for you
+		virtual void MakeThread(IThread *pThread) =0;
+		//Makes a thread with flag specified
+		virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags) =0;
+		//Makes a thread, full options can be specified
+		virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params) =0;
+		//Return priority bounds
+		virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min) =0;
+	};
+
+	/**
+	 * Basic Mutex
+	 */
+	class IMutex
+	{
+	public:
+		virtual ~IMutex() { };
+	public:
+		/**
+		 * Attempts to lock, but returns instantly.
+		 */
+		virtual bool TryLock() =0;
+		/**
+ 		 * Attempts to lock by waiting for release.
+		 */
+		virtual void Lock() =0;
+		/**
+		 * Unlocks mutex.
+		 */
+		virtual void Unlock() =0;
+		/**
+		 * Frees the mutex handle.
+		 */
+		virtual void DestroyThis() =0;
+	};
+
+
+	class IEventSignal
+	{
+	public:
+		/**
+		 * Waits for the signal.
+		 */
+		virtual void Wait() =0;
+		/** 
+		 * Triggers the signal.
+		 * Resets the signals after triggering.
+		 */
+		virtual void Signal() =0;
+		/**
+		 * Frees the signal handle.
+		 */
+		virtual void DestroyThis() =0;
+	};
+
+	/**
+	 * Describes a threading system
+	 */
+	class IThreader : public IThreadCreator
+	{
+	public:
+		virtual IMutex *MakeMutex() =0;
+		virtual void MakeThread(IThread *pThread) =0;
+		virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags) =0;
+		virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params) =0;
+		virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min) =0;
+		virtual void ThreadSleep(unsigned int ms) =0;
+		/**
+		 * Creates a non-signalled event.
+		 */
+		virtual IEventSignal *MakeEventSignal() =0;
+	};
+
+	enum WorkerState
+	{
+		Worker_Invalid = -3,
+		Worker_Stopped = -2,
+		Worker_Paused = -1,
+		Worker_Running,
+	};
+
+	/**
+	 * This is an extension of the threader that is implemented.
+	 * It "simulates" threading in a queue, and processes the queue whenever
+	 *  RunFrame is called (leaving it up to the implementation).
+	 * Worker may or may not be started upon instantiation.
+	 */
+	class IWorker : public IThreadCreator
+	{
+	public:
+		virtual unsigned int RunFrame() =0;
+		virtual void MakeThread(IThread *pThread) =0;
+		virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags) =0;
+		virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params) =0;
+		virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min) =0;
+	public:
+		//Controls the worker
+		virtual bool Pause() =0;
+		virtual bool Unpause() =0;
+		virtual bool Start() =0;
+		//If flush is true, all remaining tasks will be cancelled.
+		//Otherwise, it will wait until the tasks have been depleted, then
+		// end.
+		virtual bool Stop(bool flush_cancel) =0;
+		//Flushes out any remaining threads
+		virtual unsigned int Flush(bool flush_cancel) =0;
+		//returns status and number of threads in queue
+		virtual WorkerState GetStatus(unsigned int *numThreads) =0;
+	};
+};
+
+#endif //_INCLUDE_SOURCEMOD_THREADER_H

dlls/sqlite/thread/PosixThreads.cpp

@@ -0,0 +1,263 @@
+#include <unistd.h>
+#include "PosixThreads.h"
+
+void PosixThreader::ThreadSleep(unsigned int ms)
+{
+	usleep( ms * 1000 );
+}
+
+void PosixThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
+{
+	max = ThreadPrio_Normal;
+	min = ThreadPrio_Normal;
+}
+
+IMutex *PosixThreader::MakeMutex()
+{
+	pthread_mutex_t mutex;
+
+	if (pthread_mutex_init(&mutex, NULL) != 0)
+		return NULL;
+
+	PosixMutex *pMutex = new PosixMutex(mutex);
+
+	return pMutex;
+}
+
+
+void PosixThreader::MakeThread(IThread *pThread)
+{
+	ThreadParams defparams;
+
+	defparams.flags = Thread_AutoRelease;
+	defparams.prio = ThreadPrio_Normal;
+
+	MakeThread(pThread, &defparams);
+}
+
+IThreadHandle *PosixThreader::MakeThread(IThread *pThread, ThreadFlags flags)
+{
+	ThreadParams defparams;
+
+	defparams.flags = flags;
+	defparams.prio = ThreadPrio_Normal;
+
+	return MakeThread(pThread, &defparams);
+}
+
+void *Posix_ThreadGate(void *param)
+{
+	PosixThreader::ThreadHandle *pHandle = 
+		reinterpret_cast<PosixThreader::ThreadHandle *>(param);
+
+	//Block this thread from being started initially.
+	pthread_mutex_lock(&pHandle->m_runlock);
+	//if we get here, we've obtained the lock and are allowed to run.
+	//unlock and continue.
+	pthread_mutex_unlock(&pHandle->m_runlock);
+
+	pHandle->m_run->RunThread(pHandle);
+
+	ThreadParams params;
+	pthread_mutex_lock(&pHandle->m_statelock);
+	pHandle->m_state = Thread_Done;
+	pHandle->GetParams(&params);
+	pthread_mutex_unlock(&pHandle->m_statelock);
+
+	pHandle->m_run->OnTerminate(pHandle, false);
+	if (params.flags & Thread_AutoRelease)
+		delete pHandle;
+
+	return 0;
+}
+
+ThreadParams g_defparams;
+IThreadHandle *PosixThreader::MakeThread(IThread *pThread, const ThreadParams *params)
+{
+	if (params == NULL)
+		params = &g_defparams;
+
+	PosixThreader::ThreadHandle *pHandle = 
+		new PosixThreader::ThreadHandle(this, pThread, params);
+
+	pthread_mutex_lock(&pHandle->m_runlock);
+
+	int err;
+	err = pthread_create(&pHandle->m_thread, NULL, Posix_ThreadGate, (void *)pHandle);	
+
+	if (err != 0)
+	{
+		pthread_mutex_unlock(&pHandle->m_runlock);
+		delete pHandle;
+		return NULL;
+	}
+
+	//Don't bother setting priority...
+
+	if (!(pHandle->m_params.flags & Thread_CreateSuspended))
+	{
+		pHandle->m_state = Thread_Running;
+		err = pthread_mutex_unlock(&pHandle->m_runlock);
+		if (err != 0)
+			pHandle->m_state = Thread_Paused;
+	}
+
+	return pHandle;
+}
+
+IEventSignal *PosixThreader::MakeEventSignal()
+{
+	return new PosixEventSignal();
+}
+
+/*****************
+**** Mutexes ****
+*****************/
+
+PosixThreader::PosixMutex::~PosixMutex()
+{
+	pthread_mutex_destroy(&m_mutex);
+}
+
+bool PosixThreader::PosixMutex::TryLock()
+{
+	int err = pthread_mutex_trylock(&m_mutex);
+
+	return (err == 0);
+}
+
+void PosixThreader::PosixMutex::Lock()
+{
+	pthread_mutex_lock(&m_mutex);
+}
+
+void PosixThreader::PosixMutex::Unlock()
+{
+	pthread_mutex_unlock(&m_mutex);
+}
+
+void PosixThreader::PosixMutex::DestroyThis()
+{
+	delete this;
+}
+
+/******************
+* Thread Handles *
+******************/
+
+PosixThreader::ThreadHandle::ThreadHandle(IThreader *parent, IThread *run, const ThreadParams *params) : 
+	m_parent(parent), m_run(run), m_params(*params), m_state(Thread_Paused)
+{
+	pthread_mutex_init(&m_runlock, NULL);
+	pthread_mutex_init(&m_statelock, NULL);
+}
+
+PosixThreader::ThreadHandle::~ThreadHandle()
+{
+	pthread_mutex_destroy(&m_runlock);
+	pthread_mutex_destroy(&m_statelock);
+}
+
+bool PosixThreader::ThreadHandle::WaitForThread()
+{
+	void *arg;
+	
+	if (pthread_join(m_thread, &arg) != 0)
+		return false;
+
+	return true;
+}
+
+ThreadState PosixThreader::ThreadHandle::GetState()
+{
+	ThreadState state;
+
+	pthread_mutex_lock(&m_statelock);
+	state = m_state;
+	pthread_mutex_unlock(&m_statelock);
+
+	return state;
+}
+
+IThreadCreator *PosixThreader::ThreadHandle::Parent()
+{
+	return m_parent;
+}
+
+void PosixThreader::ThreadHandle::DestroyThis()
+{
+	if (m_params.flags & Thread_AutoRelease)
+		return;
+
+	delete this;
+}
+
+void PosixThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
+{
+	if (!ptparams)
+		return;
+
+	*ptparams = m_params;
+}
+
+ThreadPriority PosixThreader::ThreadHandle::GetPriority()
+{
+	return ThreadPrio_Normal;
+}
+
+bool PosixThreader::ThreadHandle::SetPriority(ThreadPriority prio)
+{
+	return (prio == ThreadPrio_Normal);
+}
+
+bool PosixThreader::ThreadHandle::Unpause()
+{
+	if (m_state != Thread_Paused)
+		return false;
+
+	m_state = Thread_Running;
+
+	if (pthread_mutex_unlock(&m_runlock) != 0)
+	{
+		m_state = Thread_Paused;
+		return false;
+	}
+
+	return true;
+}
+
+/*****************
+ * EVENT SIGNALS *
+ *****************/
+
+PosixThreader::PosixEventSignal::PosixEventSignal()
+{
+	pthread_cond_init(&m_cond, NULL);
+	pthread_mutex_init(&m_mutex, NULL);
+}
+
+PosixThreader::PosixEventSignal::~PosixEventSignal()
+{
+	pthread_cond_destroy(&m_cond);
+	pthread_mutex_destroy(&m_mutex);
+}
+
+void PosixThreader::PosixEventSignal::Wait()
+{
+	pthread_mutex_lock(&m_mutex);
+	pthread_cond_wait(&m_cond, &m_mutex);
+	pthread_mutex_unlock(&m_mutex);
+}
+
+void PosixThreader::PosixEventSignal::Signal()
+{
+	pthread_mutex_lock(&m_mutex);
+	pthread_cond_broadcast(&m_cond);
+	pthread_mutex_unlock(&m_mutex);
+}
+
+void PosixThreader::PosixEventSignal::DestroyThis()
+{
+        delete this;
+}
+

dlls/sqlite/thread/PosixThreads.h

@@ -0,0 +1,82 @@
+#ifndef _INCLUDE_POSIXTHREADS_H_
+#define _INCLUDE_POSIXTHREADS_H_
+
+#include <pthread.h>
+#include "IThreader.h"
+
+using namespace SourceMod;
+
+void *Posix_ThreadGate(void *param);
+
+class PosixThreader : public IThreader
+{
+public:
+	class ThreadHandle : public IThreadHandle
+	{
+		friend class PosixThreader;
+		friend void *Posix_ThreadGate(void *param);
+	public:
+		ThreadHandle(IThreader *parent, IThread *run, const ThreadParams *params);
+		virtual ~ThreadHandle();
+	public:
+		virtual bool WaitForThread();
+		virtual void DestroyThis();
+		virtual IThreadCreator *Parent();
+		virtual void GetParams(ThreadParams *ptparams);
+		virtual ThreadPriority GetPriority();
+		virtual bool SetPriority(ThreadPriority prio);
+		virtual ThreadState GetState();
+		virtual bool Unpause();
+	protected:
+		IThreader *m_parent;		//Parent handle
+		pthread_t m_thread;			//Windows HANDLE	
+		ThreadParams m_params;		//Current Parameters
+		IThread *m_run;	//Runnable context
+		pthread_mutex_t m_statelock;
+		pthread_mutex_t m_runlock;
+		ThreadState m_state;		//internal state
+	};
+	class PosixMutex : public IMutex
+	{
+	public:
+		PosixMutex(pthread_mutex_t m) : m_mutex(m)
+		{
+		};
+		virtual ~PosixMutex();
+	public:
+		virtual bool TryLock();
+		virtual void Lock();
+		virtual void Unlock();
+		virtual void DestroyThis();
+	protected:
+		pthread_mutex_t m_mutex;
+	};
+	class PosixEventSignal : public IEventSignal
+	{
+	public:
+		PosixEventSignal();
+		virtual ~PosixEventSignal();
+	public:
+		virtual void Wait();
+		virtual void Signal();
+		virtual void DestroyThis();
+	protected:
+		pthread_cond_t m_cond;
+		pthread_mutex_t m_mutex;
+	};
+public:
+	virtual IMutex *MakeMutex();
+	virtual void MakeThread(IThread *pThread);
+	virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags);
+	virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params);
+	virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min);
+	virtual void ThreadSleep(unsigned int ms);
+	virtual IEventSignal *MakeEventSignal();
+};
+
+#if defined SM_DEFAULT_THREADER && !defined SM_MAIN_THREADER
+#define SM_MAIN_THREADER PosixThreader;
+typedef class PosixThreader MainThreader;
+#endif
+
+#endif //_INCLUDE_POSIXTHREADS_H_

dlls/sqlite/thread/ThreadSupport.h

@@ -0,0 +1,10 @@
+#ifndef _INCLUDE_SOURCEMOD_THREAD_SUPPORT_H
+#define _INCLUDE_SOURCEMOD_THREAD_SUPPORT_H
+
+#if defined __linux__
+#include "PosixThreads.h"
+#elif defined WIN32
+#include "WinThreads.h"
+#endif
+
+#endif //_INCLUDE_SOURCEMOD_THREAD_SUPPORT_H

dlls/sqlite/thread/ThreadWorker.cpp

@@ -0,0 +1,245 @@
+#include "ThreadWorker.h"
+
+ThreadWorker::ThreadWorker() : 
+	m_Threader(NULL),
+	m_QueueLock(NULL),
+	m_StateLock(NULL),
+	m_PauseSignal(NULL),
+	m_AddSignal(NULL),
+	me(NULL),
+	m_think_time(DEFAULT_THINK_TIME_MS)
+{
+	m_state = Worker_Invalid;
+}
+
+ThreadWorker::ThreadWorker(IThreader *pThreader, unsigned int thinktime) : 
+	m_Threader(pThreader),
+	m_QueueLock(NULL),
+	m_StateLock(NULL),
+	m_PauseSignal(NULL),
+	m_AddSignal(NULL),
+	me(NULL),
+	m_think_time(thinktime)
+{
+	if (m_Threader)
+	{
+		m_state = Worker_Stopped;
+	} else {
+		m_state = Worker_Invalid;
+	}
+}
+
+ThreadWorker::~ThreadWorker()
+{
+	if (m_state != Worker_Stopped || m_state != Worker_Invalid)
+		Stop(true);
+
+	if (m_ThreadQueue.size())
+		Flush(true);
+}
+
+void ThreadWorker::OnTerminate(IThreadHandle *pHandle, bool cancel)
+{
+	//we don't particularly care
+	return;
+}
+
+void ThreadWorker::RunThread(IThreadHandle *pHandle)
+{
+	WorkerState this_state = Worker_Running;
+	size_t num;
+    
+	while (true)
+	{
+		/**
+		 * Check number of items in the queue
+		 */
+		if (this_state != Worker_Stopped)
+		{
+			m_QueueLock->Lock();
+			num = m_ThreadQueue.size();
+			if (!num)
+			{
+				/** 
+				 * if none, wait for an item
+				 */
+				m_Waiting = true;
+				m_QueueLock->Unlock();
+				m_AddSignal->Wait();
+				m_Waiting = false;
+			} else {
+				m_QueueLock->Unlock();
+			}
+		}
+		m_StateLock->Lock();
+		this_state = m_state;
+		m_StateLock->Unlock();
+		if (this_state != Worker_Running)
+		{
+			if (this_state == Worker_Paused || this_state == Worker_Stopped)
+			{
+				//wait until the lock is cleared.
+				if (this_state == Worker_Paused)
+					m_PauseSignal->Wait();
+				if (this_state == Worker_Stopped)
+				{
+					//if we're supposed to flush cleanrly, 
+					// run all of the remaining frames first.
+					if (!m_FlushType)
+					{
+						while (m_ThreadQueue.size())
+							RunFrame();
+					}
+					break;
+				}
+			}
+		}
+		/**
+		 * Run the frame.
+		 */
+		RunFrame();
+
+		/**
+		 * wait in between threads if specified
+		 */
+		if (m_think_time)
+			m_Threader->ThreadSleep(m_think_time);
+	}
+}
+
+SWThreadHandle *ThreadWorker::PopThreadFromQueue()
+{
+	if (m_state <= Worker_Stopped && !m_QueueLock)
+		return NULL;
+
+	SWThreadHandle *swt;
+	m_QueueLock->Lock();
+	swt = BaseWorker::PopThreadFromQueue();
+	m_QueueLock->Unlock();
+
+	return swt;
+}
+
+void ThreadWorker::AddThreadToQueue(SWThreadHandle *pHandle)
+{
+	if (m_state <= Worker_Stopped)
+		return;
+
+	m_QueueLock->Lock();
+	BaseWorker::AddThreadToQueue(pHandle);
+	if (m_Waiting)
+	{
+		m_AddSignal->Signal();
+	}
+	m_QueueLock->Unlock();
+}
+
+WorkerState ThreadWorker::GetStatus(unsigned int *threads)
+{
+	WorkerState state;
+
+	m_StateLock->Lock();
+	state = BaseWorker::GetStatus(threads);
+	m_StateLock->Unlock();
+
+	return state;
+}
+
+bool ThreadWorker::Start()
+{
+	if (m_state == Worker_Invalid)
+	{
+		if (m_Threader == NULL)
+			return false;
+	} else if (m_state != Worker_Stopped) {
+		return false;
+	}
+
+	m_Waiting = false;
+	m_QueueLock = m_Threader->MakeMutex();
+	m_StateLock = m_Threader->MakeMutex();
+	m_PauseSignal = m_Threader->MakeEventSignal();
+	m_AddSignal = m_Threader->MakeEventSignal();
+	m_state = Worker_Running;
+	ThreadParams pt;
+	pt.flags = Thread_Default;
+	pt.prio = ThreadPrio_Normal;
+	me = m_Threader->MakeThread(this, &pt);
+
+	return true;
+}
+
+bool ThreadWorker::Stop(bool flush_cancel)
+{
+	if (m_state == Worker_Invalid || m_state == Worker_Stopped)
+		return false;
+
+	WorkerState oldstate;
+
+	//set new state
+	m_StateLock->Lock();
+	oldstate = m_state;
+	m_state = Worker_Stopped;
+	m_FlushType = flush_cancel;
+	m_StateLock->Unlock();
+
+	if (oldstate == Worker_Paused)
+	{
+		Unpause();
+	} else {
+		m_AddSignal->Signal();
+		Pause();
+		Unpause();
+	}
+
+	me->WaitForThread();
+	//destroy it
+	me->DestroyThis();
+	//flush all remaining events
+	Flush(true);
+
+	//free mutex locks
+	m_QueueLock->DestroyThis();
+	m_StateLock->DestroyThis();
+	m_PauseSignal->DestroyThis();
+	m_AddSignal->DestroyThis();
+
+	//invalidizzle
+	m_QueueLock = NULL;
+	m_StateLock = NULL;
+	m_PauseSignal = NULL;
+	m_AddSignal = NULL;
+	me = NULL;
+
+	return true;
+}
+
+bool ThreadWorker::Pause()
+{
+	if (m_state != Worker_Running)
+		return false;
+
+	m_StateLock->Lock();
+	m_state = Worker_Paused;
+	m_StateLock->Unlock();
+
+	return true;
+}
+
+
+bool ThreadWorker::Unpause()
+{
+	if (m_state != Worker_Paused)
+		return false;
+
+	m_StateLock->Lock();
+	m_state = Worker_Running;
+	m_StateLock->Unlock();
+	m_PauseSignal->Signal();
+	if (m_Waiting)
+	{
+		m_AddSignal->Signal();
+	}
+
+	return true;
+}

dlls/sqlite/thread/ThreadWorker.h

@@ -0,0 +1,40 @@
+#ifndef _INCLUDE_SOURCEMOD_THREADWORKER_H
+#define _INCLUDE_SOURCEMOD_THREADWORKER_H
+
+#include "BaseWorker.h"
+
+#define DEFAULT_THINK_TIME_MS	500
+
+class ThreadWorker : public BaseWorker, public IThread
+{
+public:
+	ThreadWorker();
+	ThreadWorker(IThreader *pThreader, unsigned int thinktime=DEFAULT_THINK_TIME_MS);
+	virtual ~ThreadWorker();
+public:	//IThread
+	virtual void OnTerminate(IThreadHandle *pHandle, bool cancel);
+	virtual void RunThread(IThreadHandle *pHandle);
+public:	//IWorker
+	//Controls the worker
+	virtual bool Pause();
+	virtual bool Unpause();
+	virtual bool Start();
+	virtual bool Stop(bool flush_cancel);
+	//returns status and number of threads in queue
+	virtual WorkerState GetStatus(unsigned int *numThreads);
+public:	//BaseWorker
+	virtual void AddThreadToQueue(SWThreadHandle *pHandle);
+	virtual SWThreadHandle *PopThreadFromQueue();
+protected:
+	IThreader *m_Threader;
+	IMutex *m_QueueLock;
+	IMutex *m_StateLock;
+	IEventSignal *m_PauseSignal;
+	IEventSignal *m_AddSignal;
+	IThreadHandle *me;
+	unsigned int m_think_time;
+	volatile bool m_Waiting;
+	volatile bool m_FlushType;
+};
+
+#endif //_INCLUDE_SOURCEMOD_THREADWORKER_H

dlls/sqlite/thread/WinThreads.cpp

@@ -0,0 +1,289 @@
+#include "WinThreads.h"
+
+void WinThreader::ThreadSleep(unsigned int ms)
+{
+	Sleep((DWORD)ms);
+}
+
+IMutex *WinThreader::MakeMutex()
+{
+	HANDLE mutex = CreateMutexA(NULL, FALSE, NULL);
+
+	if (mutex == NULL)
+		return NULL;
+
+	WinMutex *pMutex = new WinMutex(mutex);
+
+	return pMutex;
+}
+
+IThreadHandle *WinThreader::MakeThread(IThread *pThread, ThreadFlags flags)
+{
+	ThreadParams defparams;
+
+	defparams.flags = flags;
+	defparams.prio = ThreadPrio_Normal;
+
+	return MakeThread(pThread, &defparams);
+}
+
+void WinThreader::MakeThread(IThread *pThread)
+{
+	ThreadParams defparams;
+
+	defparams.flags = Thread_AutoRelease;
+	defparams.prio = ThreadPrio_Normal;
+
+	MakeThread(pThread, &defparams);
+}
+
+DWORD WINAPI Win32_ThreadGate(LPVOID param)
+{
+	WinThreader::ThreadHandle *pHandle = 
+		reinterpret_cast<WinThreader::ThreadHandle *>(param);
+
+	pHandle->m_run->RunThread(pHandle);
+
+	ThreadParams params;
+	EnterCriticalSection(&pHandle->m_crit);
+	pHandle->m_state = Thread_Done;
+	pHandle->GetParams(&params);
+	LeaveCriticalSection(&pHandle->m_crit);
+
+	pHandle->m_run->OnTerminate(pHandle, false);
+	if (params.flags & Thread_AutoRelease)
+		delete pHandle;
+
+	return 0;
+}
+
+void WinThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
+{
+	max = ThreadPrio_Maximum;
+	min = ThreadPrio_Minimum;
+}
+
+ThreadParams g_defparams;
+IThreadHandle *WinThreader::MakeThread(IThread *pThread, const ThreadParams *params)
+{
+	if (params == NULL)
+		params = &g_defparams;
+
+	WinThreader::ThreadHandle *pHandle = 
+		new WinThreader::ThreadHandle(this, NULL, pThread, params);
+
+	DWORD tid;
+	pHandle->m_thread = 
+		CreateThread(NULL, 0, &Win32_ThreadGate, (LPVOID)pHandle, CREATE_SUSPENDED, &tid);
+
+	if (!pHandle->m_thread)
+	{
+		delete pHandle;
+		return NULL;
+	}
+
+	if (pHandle->m_params.prio != ThreadPrio_Normal)
+	{
+		pHandle->SetPriority(pHandle->m_params.prio);
+	}
+
+	if (!(pHandle->m_params.flags & Thread_CreateSuspended))
+	{
+		pHandle->Unpause();
+	}
+
+	return pHandle;
+}
+
+IEventSignal *WinThreader::MakeEventSignal()
+{
+	HANDLE event = CreateEventA(NULL, FALSE, FALSE, NULL);
+
+	if (!event)
+		return NULL;
+
+	WinEvent *pEvent = new WinEvent(event);
+
+	return pEvent;
+}
+
+/*****************
+ **** Mutexes ****
+ *****************/
+
+WinThreader::WinMutex::~WinMutex()
+{
+	if (m_mutex)
+	{
+		CloseHandle(m_mutex);
+		m_mutex = NULL;
+	}
+}
+
+bool WinThreader::WinMutex::TryLock()
+{
+	if (!m_mutex)
+		return false;
+
+	if (WaitForSingleObject(m_mutex, 0) != WAIT_FAILED)
+		return true;
+
+	return false;
+}
+
+void WinThreader::WinMutex::Lock()
+{
+	if (!m_mutex)
+		return;
+
+	WaitForSingleObject(m_mutex, INFINITE);
+}
+
+void WinThreader::WinMutex::Unlock()
+{
+	if (!m_mutex)
+		return;
+
+	ReleaseMutex(m_mutex);
+}
+
+void WinThreader::WinMutex::DestroyThis()
+{
+	delete this;
+}
+
+/******************
+ * Thread Handles *
+ ******************/
+
+WinThreader::ThreadHandle::ThreadHandle(IThreader *parent, HANDLE hthread, IThread *run, const ThreadParams *params) : 
+	m_parent(parent), m_thread(hthread), m_run(run), m_params(*params),
+	m_state(Thread_Paused)
+{
+	InitializeCriticalSection(&m_crit);
+}
+
+WinThreader::ThreadHandle::~ThreadHandle()
+{
+	if (m_thread)
+	{
+		CloseHandle(m_thread);
+		m_thread = NULL;
+	}
+	DeleteCriticalSection(&m_crit);
+}
+
+bool WinThreader::ThreadHandle::WaitForThread()
+{
+	if (m_thread == NULL)
+		return false;
+
+	if (WaitForSingleObject(m_thread, INFINITE) != 0)
+		return false;
+
+	return true;
+}
+
+ThreadState WinThreader::ThreadHandle::GetState()
+{
+	ThreadState state;
+
+	EnterCriticalSection(&m_crit);
+	state = m_state;
+	LeaveCriticalSection(&m_crit);
+
+	return state;
+}
+
+IThreadCreator *WinThreader::ThreadHandle::Parent()
+{
+	return m_parent;
+}
+
+void WinThreader::ThreadHandle::DestroyThis()
+{
+	if (m_params.flags & Thread_AutoRelease)
+		return;
+
+	delete this;
+}
+
+void WinThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
+{
+	if (!ptparams)
+		return;
+
+	*ptparams = m_params;
+}
+
+ThreadPriority WinThreader::ThreadHandle::GetPriority()
+{
+	return m_params.prio;
+}
+
+bool WinThreader::ThreadHandle::SetPriority(ThreadPriority prio)
+{
+	if (!m_thread)
+		return false;
+
+	BOOL res = FALSE;
+
+	if (prio >= ThreadPrio_Maximum)
+		res = SetThreadPriority(m_thread, THREAD_PRIORITY_HIGHEST);
+	else if (prio <= ThreadPrio_Minimum)
+		res = SetThreadPriority(m_thread, THREAD_PRIORITY_LOWEST);
+	else if (prio == ThreadPrio_Normal)
+		res = SetThreadPriority(m_thread, THREAD_PRIORITY_NORMAL);
+	else if (prio == ThreadPrio_High)
+		res = SetThreadPriority(m_thread, THREAD_PRIORITY_ABOVE_NORMAL);
+	else if (prio == ThreadPrio_Low)
+		res = SetThreadPriority(m_thread, THREAD_PRIORITY_BELOW_NORMAL);
+
+	m_params.prio = prio;
+
+	return (res != FALSE);
+}
+
+bool WinThreader::ThreadHandle::Unpause()
+{
+	if (!m_thread)
+		return false;
+
+	if (m_state != Thread_Paused)
+		return false;
+
+	m_state = Thread_Running;
+
+	if (ResumeThread(m_thread) == -1)
+	{
+		m_state = Thread_Paused;
+		return false;
+	}
+
+	return true;
+}
+
+/*****************
+ * EVENT SIGNALS *
+ *****************/
+
+WinThreader::WinEvent::~WinEvent()
+{
+	CloseHandle(m_event);
+}
+
+void WinThreader::WinEvent::Wait()
+{
+	WaitForSingleObject(m_event, INFINITE);
+}
+
+void WinThreader::WinEvent::Signal()
+{
+	SetEvent(m_event);
+}
+
+void WinThreader::WinEvent::DestroyThis()
+{
+	delete this;
+}
+

dlls/sqlite/thread/WinThreads.h

@@ -0,0 +1,82 @@
+#ifndef _INCLUDE_WINTHREADS_H_
+#define _INCLUDE_WINTHREADS_H_
+
+#include <windows.h>
+#include "IThreader.h"
+
+using namespace SourceMod;
+
+DWORD WINAPI Win32_ThreadGate(LPVOID param);
+
+class WinThreader : public IThreader
+{
+public:
+	class ThreadHandle : public IThreadHandle
+	{
+		friend class WinThreader;
+		friend DWORD WINAPI Win32_ThreadGate(LPVOID param);
+	public:
+		ThreadHandle(IThreader *parent, HANDLE hthread, IThread *run, const ThreadParams *params);
+		virtual ~ThreadHandle();
+	public:
+		virtual bool WaitForThread();
+		virtual void DestroyThis();
+		virtual IThreadCreator *Parent();
+		virtual void GetParams(ThreadParams *ptparams);
+		virtual ThreadPriority GetPriority();
+		virtual bool SetPriority(ThreadPriority prio);
+		virtual ThreadState GetState();
+		virtual bool Unpause();
+	protected:
+		IThreader *m_parent;		//Parent handle
+		HANDLE m_thread;			//Windows HANDLE	
+		ThreadParams m_params;		//Current Parameters
+		IThread *m_run;	//Runnable context
+		ThreadState m_state;		//internal state
+		CRITICAL_SECTION m_crit;
+	};
+	class WinMutex : public IMutex
+	{
+	public:
+		WinMutex(HANDLE mutex) : m_mutex(mutex)
+		{
+		};
+		virtual ~WinMutex();
+	public:
+		virtual bool TryLock();
+		virtual void Lock();
+		virtual void Unlock();
+		virtual void DestroyThis();
+	protected:
+		HANDLE m_mutex;
+	};
+	class WinEvent : public IEventSignal
+	{
+	public:
+		WinEvent(HANDLE event) : m_event(event)
+		{
+		};
+		virtual ~WinEvent();
+	public:
+		virtual void Wait();
+		virtual void Signal();
+		virtual void DestroyThis();
+	public:
+		HANDLE m_event;
+	};
+public:
+	virtual IMutex *MakeMutex();
+	virtual void MakeThread(IThread *pThread);
+	virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags);
+	virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params);
+	virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min);
+	virtual void ThreadSleep(unsigned int ms);
+	virtual IEventSignal *MakeEventSignal();
+};
+
+#if defined SM_DEFAULT_THREADER && !defined SM_MAIN_THREADER
+#define SM_MAIN_THREADER WinThreader;
+typedef class WinThreader MainThreader;
+#endif
+
+#endif //_INCLUDE_WINTHREADS_H_