ds@1952: /**
ds@1952:  * vim: set ts=4 :
ds@1952:  * =============================================================================
ds@1952:  * SourceMod
ds@1952:  * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.
ds@1952:  * =============================================================================
ds@1952:  *
ds@1952:  * This program is free software; you can redistribute it and/or modify it under
ds@1952:  * the terms of the GNU General Public License, version 3.0, as published by the
ds@1952:  * Free Software Foundation.
ds@1952:  * 
ds@1952:  * This program is distributed in the hope that it will be useful, but WITHOUT
ds@1952:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
ds@1952:  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
ds@1952:  * details.
ds@1952:  *
ds@1952:  * You should have received a copy of the GNU General Public License along with
ds@1952:  * this program.  If not, see <http://www.gnu.org/licenses/>.
ds@1952:  *
ds@1952:  * As a special exception, AlliedModders LLC gives you permission to link the
ds@1952:  * code of this program (as well as its derivative works) to "Half-Life 2," the
ds@1952:  * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
ds@1952:  * by the Valve Corporation.  You must obey the GNU General Public License in
ds@1952:  * all respects for all other code used.  Additionally, AlliedModders LLC grants
ds@1952:  * this exception to all derivative works.  AlliedModders LLC defines further
ds@1952:  * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
ds@1952:  * or <http://www.sourcemod.net/license.php>.
ds@1952:  *
ds@1952:  * Version: $Id$
ds@1952:  */
ds@1952: 
ds@1952: #define _WIN32_WINNT 0x0400
ds@1952: #include "WinThreads.h"
ds@1952: #include "ThreadWorker.h"
ds@1952: 
ds@1952: IThreadWorker *WinThreader::MakeWorker(IThreadWorkerCallbacks *hooks, bool threaded)
ds@1952: {
ds@1952: 	if (threaded)
ds@1952: 	{
ds@1952: 		return new ThreadWorker(hooks, this, DEFAULT_THINK_TIME_MS);
ds@1952: 	} else {
ds@1952: 		return new BaseWorker(hooks);
ds@1952: 	}
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::DestroyWorker(IThreadWorker *pWorker)
ds@1952: {
ds@1952: 	delete pWorker;
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::ThreadSleep(unsigned int ms)
ds@1952: {
ds@1952: 	Sleep((DWORD)ms);
ds@1952: }
ds@1952: 
ds@1952: IMutex *WinThreader::MakeMutex()
ds@1952: {
ds@1952: 	WinMutex *pMutex = new WinMutex();
ds@1952: 
ds@1952: 	return pMutex;
ds@1952: }
ds@1952: 
ds@1952: IThreadHandle *WinThreader::MakeThread(IThread *pThread, ThreadFlags flags)
ds@1952: {
ds@1952: 	ThreadParams defparams;
ds@1952: 
ds@1952: 	defparams.flags = flags;
ds@1952: 	defparams.prio = ThreadPrio_Normal;
ds@1952: 
ds@1952: 	return MakeThread(pThread, &defparams);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::MakeThread(IThread *pThread)
ds@1952: {
ds@1952: 	ThreadParams defparams;
ds@1952: 
ds@1952: 	defparams.flags = Thread_AutoRelease;
ds@1952: 	defparams.prio = ThreadPrio_Normal;
ds@1952: 
ds@1952: 	MakeThread(pThread, &defparams);
ds@1952: }
ds@1952: 
ds@1952: DWORD WINAPI Win32_ThreadGate(LPVOID param)
ds@1952: {
ds@1952: 	WinThreader::ThreadHandle *pHandle = 
ds@1952: 		reinterpret_cast<WinThreader::ThreadHandle *>(param);
ds@1952: 
ds@1952: 	pHandle->m_run->RunThread(pHandle);
ds@1952: 
ds@1952: 	ThreadParams params;
ds@1952: 	EnterCriticalSection(&pHandle->m_crit);
ds@1952: 	pHandle->m_state = Thread_Done;
ds@1952: 	pHandle->GetParams(&params);
ds@1952: 	LeaveCriticalSection(&pHandle->m_crit);
ds@1952: 
ds@1952: 	pHandle->m_run->OnTerminate(pHandle, false);
ds@1952: 	if (params.flags & Thread_AutoRelease)
ds@1952: 		delete pHandle;
ds@1952: 
ds@1952: 	return 0;
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
ds@1952: {
ds@1952: 	max = ThreadPrio_Maximum;
ds@1952: 	min = ThreadPrio_Minimum;
ds@1952: }
ds@1952: 
ds@1952: ThreadParams g_defparams;
ds@1952: IThreadHandle *WinThreader::MakeThread(IThread *pThread, const ThreadParams *params)
ds@1952: {
ds@1952: 	if (params == NULL)
ds@1952: 		params = &g_defparams;
ds@1952: 
ds@1952: 	WinThreader::ThreadHandle *pHandle = 
ds@1952: 		new WinThreader::ThreadHandle(this, NULL, pThread, params);
ds@1952: 
ds@1952: 	DWORD tid;
ds@1952: 	pHandle->m_thread = 
ds@1952: 		CreateThread(NULL, 0, &Win32_ThreadGate, (LPVOID)pHandle, CREATE_SUSPENDED, &tid);
ds@1952: 
ds@1952: 	if (!pHandle->m_thread)
ds@1952: 	{
ds@1952: 		delete pHandle;
ds@1952: 		return NULL;
ds@1952: 	}
ds@1952: 
ds@1952: 	if (pHandle->m_params.prio != ThreadPrio_Normal)
ds@1952: 	{
ds@1952: 		pHandle->SetPriority(pHandle->m_params.prio);
ds@1952: 	}
ds@1952: 
ds@1952: 	if (!(pHandle->m_params.flags & Thread_CreateSuspended))
ds@1952: 	{
ds@1952: 		pHandle->Unpause();
ds@1952: 	}
ds@1952: 
ds@1952: 	return pHandle;
ds@1952: }
ds@1952: 
ds@1952: IEventSignal *WinThreader::MakeEventSignal()
ds@1952: {
ds@1952: 	HANDLE event = CreateEventA(NULL, FALSE, FALSE, NULL);
ds@1952: 
ds@1952: 	if (!event)
ds@1952: 		return NULL;
ds@1952: 
ds@1952: 	WinEvent *pEvent = new WinEvent(event);
ds@1952: 
ds@1952: 	return pEvent;
ds@1952: }
ds@1952: 
ds@1952: /*****************
ds@1952:  **** Mutexes ****
ds@1952:  *****************/
ds@1952: 
ds@1952: WinThreader::WinMutex::WinMutex()
ds@1952: {
ds@1952: 	InitializeCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: WinThreader::WinMutex::~WinMutex()
ds@1952: {
ds@1952: 	DeleteCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: bool WinThreader::WinMutex::TryLock()
ds@1952: {
ds@1952: 	return (TryEnterCriticalSection(&m_crit) != FALSE);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinMutex::Lock()
ds@1952: {
ds@1952: 	EnterCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinMutex::Unlock()
ds@1952: {
ds@1952: 	LeaveCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinMutex::DestroyThis()
ds@1952: {
ds@1952: 	delete this;
ds@1952: }
ds@1952: 
ds@1952: /******************
ds@1952:  * Thread Handles *
ds@1952:  ******************/
ds@1952: 
ds@1952: WinThreader::ThreadHandle::ThreadHandle(IThreader *parent, HANDLE hthread, IThread *run, const ThreadParams *params) : 
ds@1952: 	m_parent(parent), m_thread(hthread), m_run(run), m_params(*params),
ds@1952: 	m_state(Thread_Paused)
ds@1952: {
ds@1952: 	InitializeCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: WinThreader::ThreadHandle::~ThreadHandle()
ds@1952: {
ds@1952: 	if (m_thread)
ds@1952: 	{
ds@1952: 		CloseHandle(m_thread);
ds@1952: 		m_thread = NULL;
ds@1952: 	}
ds@1952: 	DeleteCriticalSection(&m_crit);
ds@1952: }
ds@1952: 
ds@1952: bool WinThreader::ThreadHandle::WaitForThread()
ds@1952: {
ds@1952: 	if (m_thread == NULL)
ds@1952: 		return false;
ds@1952: 
ds@1952: 	if (WaitForSingleObject(m_thread, INFINITE) != 0)
ds@1952: 		return false;
ds@1952: 
ds@1952: 	return true;
ds@1952: }
ds@1952: 
ds@1952: ThreadState WinThreader::ThreadHandle::GetState()
ds@1952: {
ds@1952: 	ThreadState state;
ds@1952: 
ds@1952: 	EnterCriticalSection(&m_crit);
ds@1952: 	state = m_state;
ds@1952: 	LeaveCriticalSection(&m_crit);
ds@1952: 
ds@1952: 	return state;
ds@1952: }
ds@1952: 
ds@1952: IThreadCreator *WinThreader::ThreadHandle::Parent()
ds@1952: {
ds@1952: 	return m_parent;
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::ThreadHandle::DestroyThis()
ds@1952: {
ds@1952: 	if (m_params.flags & Thread_AutoRelease)
ds@1952: 		return;
ds@1952: 
ds@1952: 	delete this;
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
ds@1952: {
ds@1952: 	if (!ptparams)
ds@1952: 		return;
ds@1952: 
ds@1952: 	*ptparams = m_params;
ds@1952: }
ds@1952: 
ds@1952: ThreadPriority WinThreader::ThreadHandle::GetPriority()
ds@1952: {
ds@1952: 	return m_params.prio;
ds@1952: }
ds@1952: 
ds@1952: bool WinThreader::ThreadHandle::SetPriority(ThreadPriority prio)
ds@1952: {
ds@1952: 	if (!m_thread)
ds@1952: 		return false;
ds@1952: 
ds@1952: 	BOOL res = FALSE;
ds@1952: 
ds@1952: 	if (prio >= ThreadPrio_Maximum)
ds@1952: 		res = SetThreadPriority(m_thread, THREAD_PRIORITY_HIGHEST);
ds@1952: 	else if (prio <= ThreadPrio_Minimum)
ds@1952: 		res = SetThreadPriority(m_thread, THREAD_PRIORITY_LOWEST);
ds@1952: 	else if (prio == ThreadPrio_Normal)
ds@1952: 		res = SetThreadPriority(m_thread, THREAD_PRIORITY_NORMAL);
ds@1952: 	else if (prio == ThreadPrio_High)
ds@1952: 		res = SetThreadPriority(m_thread, THREAD_PRIORITY_ABOVE_NORMAL);
ds@1952: 	else if (prio == ThreadPrio_Low)
ds@1952: 		res = SetThreadPriority(m_thread, THREAD_PRIORITY_BELOW_NORMAL);
ds@1952: 
ds@1952: 	m_params.prio = prio;
ds@1952: 
ds@1952: 	return (res != FALSE);
ds@1952: }
ds@1952: 
ds@1952: bool WinThreader::ThreadHandle::Unpause()
ds@1952: {
ds@1952: 	if (!m_thread)
ds@1952: 		return false;
ds@1952: 
ds@1952: 	if (m_state != Thread_Paused)
ds@1952: 		return false;
ds@1952: 
ds@1952: 	m_state = Thread_Running;
ds@1952: 
ds@1952: 	if (ResumeThread(m_thread) == -1)
ds@1952: 	{
ds@1952: 		m_state = Thread_Paused;
ds@1952: 		return false;
ds@1952: 	}
ds@1952: 
ds@1952: 	return true;
ds@1952: }
ds@1952: 
ds@1952: /*****************
ds@1952:  * EVENT SIGNALS *
ds@1952:  *****************/
ds@1952: 
ds@1952: WinThreader::WinEvent::~WinEvent()
ds@1952: {
ds@1952: 	CloseHandle(m_event);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinEvent::Wait()
ds@1952: {
ds@1952: 	WaitForSingleObject(m_event, INFINITE);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinEvent::Signal()
ds@1952: {
ds@1952: 	SetEvent(m_event);
ds@1952: }
ds@1952: 
ds@1952: void WinThreader::WinEvent::DestroyThis()
ds@1952: {
ds@1952: 	delete this;
ds@1952: }