richk@10211: /* $Id$ */
richk@10211: 
richk@10211: /** @file thread_win32.cpp Win32 thread implementation of Threads. */
richk@10211: 
richk@10211: #include "stdafx.h"
richk@10211: #include "thread.h"
richk@10211: #include "debug.h"
richk@10211: #include "core/alloc_func.hpp"
richk@10211: #include <stdlib.h>
richk@10211: #include <windows.h>
richk@10211: #include <process.h>
richk@10211: 
richk@10211: /**
richk@10211:  * Win32 thread version for ThreadObject.
richk@10211:  */
richk@10211: class ThreadObject_Win32 : public ThreadObject {
richk@10211: private:
richk@10211: 	uint     m_id_thr;
richk@10211: 	HANDLE   m_h_thr;
richk@10211: 	OTTDThreadFunc m_proc;
richk@10211: 	void     *m_param;
richk@10211: 	bool     m_attached;
richk@10211: 
richk@10211: public:
richk@10211: 	/**
richk@10211: 	 * Create a win32 thread and start it, calling proc(param).
richk@10211: 	 */
richk@10211: 	ThreadObject_Win32(OTTDThreadFunc proc, void *param) :
richk@10211: 		m_id_thr(0),
richk@10211: 		m_h_thr(NULL),
richk@10211: 		m_proc(proc),
richk@10211: 		m_param(param),
richk@10211: 		m_attached(false)
richk@10211: 	{
richk@10211: 		m_h_thr = (HANDLE)_beginthreadex(NULL, 0, &stThreadProc, this, CREATE_SUSPENDED, &m_id_thr);
richk@10211: 		if (m_h_thr == NULL) return;
richk@10211: 		ResumeThread(m_h_thr);
richk@10211: 	}
richk@10211: 
richk@10211: 	/**
richk@10211: 	 * Create a win32 thread and attach current thread to it.
richk@10211: 	 */
richk@10211: 	ThreadObject_Win32() :
richk@10211: 		m_id_thr(0),
richk@10211: 		m_h_thr(NULL),
richk@10211: 		m_proc(NULL),
richk@10211: 		m_param(NULL),
richk@10211: 		m_attached(false)
richk@10211: 	{
richk@10211: 		BOOL ret = DuplicateHandle(GetCurrentProcess(), GetCurrentThread(), GetCurrentProcess(), &m_h_thr, 0, FALSE, DUPLICATE_SAME_ACCESS);
richk@10211: 		if (!ret) return;
richk@10211: 		m_id_thr = GetCurrentThreadId();
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ ~ThreadObject_Win32()
richk@10211: 	{
richk@10211: 		if (m_h_thr != NULL) {
richk@10211: 			CloseHandle(m_h_thr);
richk@10211: 			m_h_thr = NULL;
richk@10211: 		}
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ bool IsRunning()
richk@10211: 	{
richk@10211: 		if (m_h_thr == NULL) return false;
richk@10211: 		DWORD exit_code = 0;
richk@10211: 		if (!GetExitCodeThread(m_h_thr, &exit_code)) return false;
richk@10211: 		return (exit_code == STILL_ACTIVE);
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ bool WaitForStop()
richk@10211: 	{
richk@10211: 		/* You can't wait on yourself */
richk@10211: 		assert(!IsCurrent());
richk@10211: 		/* If the thread is not running, waiting is over */
richk@10211: 		if (!IsRunning()) return true;
richk@10211: 
richk@10211: 		DWORD res = WaitForSingleObject(m_h_thr, INFINITE);
richk@10211: 		return res == WAIT_OBJECT_0;
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ bool Exit()
richk@10211: 	{
richk@10211: 		/* You can only exit yourself */
richk@10211: 		assert(IsCurrent());
richk@10211: 		/* If the thread is not running, we are already closed */
richk@10211: 		if (!IsRunning()) return false;
richk@10211: 
richk@10211: 		/* For now we terminate by throwing an error, gives much cleaner cleanup */
richk@10211: 		throw 0;
richk@10211: 	}
richk@10211: 
richk@10991: 	/* virtual */ void Join()
richk@10211: 	{
richk@10211: 		/* You cannot join yourself */
richk@10211: 		assert(!IsCurrent());
richk@10211: 
richk@10211: 		WaitForSingleObject(m_h_thr, INFINITE);
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ bool IsCurrent()
richk@10211: 	{
richk@10211: 		DWORD id_cur = GetCurrentThreadId();
richk@10211: 		return id_cur == m_id_thr;
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ uint GetId()
richk@10211: 	{
richk@10211: 		return m_id_thr;
richk@10211: 	}
richk@10211: 
richk@10211: private:
richk@10211: 	/**
richk@10211: 	 * On thread creation, this function is called, which calls the real startup
richk@10211: 	 *  function. This to get back into the correct instance again.
richk@10211: 	 */
richk@10211: 	static uint CALLBACK stThreadProc(void *thr)
richk@10211: 	{
richk@10991: 		((ThreadObject_Win32 *)thr)->ThreadProc();
richk@10991: 		return 0;
richk@10211: 	}
richk@10211: 
richk@10211: 	/**
richk@10211: 	 * A new thread is created, and this function is called. Call the custom
richk@10211: 	 *  function of the creator of the thread.
richk@10211: 	 */
richk@10991: 	void ThreadProc()
richk@10211: 	{
richk@10211: 		try {
richk@10991: 			m_proc(m_param);
richk@10211: 		} catch (...) {
richk@10211: 		}
richk@10211: 	}
richk@10211: };
richk@10211: 
richk@10211: /* static */ ThreadObject *ThreadObject::New(OTTDThreadFunc proc, void *param)
richk@10211: {
richk@10211: 	return new ThreadObject_Win32(proc, param);
richk@10211: }
richk@10211: 
richk@10211: /* static */ ThreadObject* ThreadObject::AttachCurrent()
richk@10211: {
richk@10211: 	return new ThreadObject_Win32();
richk@10211: }
richk@10211: 
richk@10211: /* static */ uint ThreadObject::CurrentId()
richk@10211: {
richk@10211: 	return GetCurrentThreadId();
richk@10211: }
richk@10211: 
richk@10211: 
richk@10211: /**
richk@10211:  * Win32 thread version of ThreadSemaphore.
richk@10211:  */
richk@10211: class ThreadSemaphore_Win32 : public ThreadSemaphore {
richk@10211: private:
richk@10211: 	HANDLE m_handle;
richk@10211: 
richk@10211: public:
richk@10211: 	ThreadSemaphore_Win32()
richk@10211: 	{
richk@10211: 		m_handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ ~ThreadSemaphore_Win32()
richk@10211: 	{
richk@10211: 		::CloseHandle(m_handle);
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ void Set()
richk@10211: 	{
richk@10211: 		::SetEvent(m_handle);
richk@10211: 	}
richk@10211: 
richk@10211: 	/* virtual */ void Wait()
richk@10211: 	{
richk@10211: 		::WaitForSingleObject(m_handle, INFINITE);
richk@10211: 	}
richk@10211: };
richk@10211: 
richk@10211: /* static */ ThreadSemaphore *ThreadSemaphore::New()
richk@10211: {
richk@10211: 	return new ThreadSemaphore_Win32();
richk@10211: }