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#include "thread_impl_win32.h"
#include "thread.h"

#include <iostream>

#if ASURA_THREAD_WIN32

namespace AsuraEngine
{
	namespace Threading
	{

		static DWORD WINAPI _thread_win32_runner(LPVOID param)
		{
			Threadable* thread = (Threadable*)param;
			return thread->Process(); // β
		}

		ThreadImplWin32::ThreadImplWin32()
		{
		}

		ThreadImplWin32::~ThreadImplWin32()
		{
			if (!m_Handle) return;
			::CloseHandle(m_Handle);
		 m_Handle = 0;
		}

		bool ThreadImplWin32::Start(Threadable* thread, uint32 stacksize/*=0*/)
		{
			assert(!IsRunning());
		 m_Handle = ::CreateThread(
				NULL
				, stacksize
				, _thread_win32_runner
				, thread
				, 0 /*е*/
			  , NULL);

			return m_Handle;
		}

		void ThreadImplWin32::Join()
		{
			// ̵߳ȴ̷߳
			::WaitForSingleObject(m_Handle, INFINITE);
		}

		void ThreadImplWin32::Kill()
		{
			::TerminateThread(m_Handle, FALSE);
		}

		void ThreadImplWin32::Sleep(uint ms)
		{
			::Sleep(ms);
		}

		bool ThreadImplWin32::IsRunning()
		{
			if (m_Handle) {
				DWORD exitCode = 0;
				// https://blog.csdn.net/yuanmeng567/article/details/19485719
				::GetExitCodeThread(m_Handle, &exitCode);
				return exitCode == STILL_ACTIVE;
			}
			return false;
		}

		bool ThreadImplWin32::IsCurrent()
		{
			return m_Handle == ::GetCurrentThread();
		}

	}
}

#endif // ASURA_THREAD_WIN32