多线程学习笔记

先看代码吧，多线程，一个进程可以有多个线程。

#include<windows.h>//要用到Sleep函数时要包含windows.h头文件
#include<iostream.h>

DWORD WINAPI Fun1Proc(LPVOID lpParameter);//函数申明
DWORD WINAPI Fun2Proc(LPVOID lpParameter);//函数申明

int tickets = 100;
///////////////////////////////////////////////////////////////////////////////////
void main()
{
	HANDLE hThread1;//定义句柄
	HANDLE hThread2;
	hThread1 = CreateThread(NULL, 0, Fun1Proc, NULL, 0, NULL);//创建线程1，对应函数地址为Fun1Proc
	hThread2 = CreateThread(NULL, 0, Fun2Proc, NULL, 0, NULL);//创建线程2，对应函数地址为Fun2Proc
	CloseHandle(hThread1);//关闭句柄，不再管
	CloseHandle(hThread2);
	cout<<"the main thread"<<endl;
	while(1);//死等空出时间来让其他线程执行。	
}

DWORD WINAPI Fun1Proc(LPVOID lpParameter)
{
	while(TRUE)
	{
		if(tickets>0)
		{
			cout<<"thread1 is running" << tickets-- << endl;
		}
		else
		{
			break;
		}
	}
	return 0;
}

DWORD WINAPI Fun2Proc(LPVOID lpParameter)
{
	while(TRUE)
	{
		if(tickets>0)
		{
			cout<<"thread2 is running" << tickets-- << endl;
		}
		else
		{
			break;
		}
	}
	return 0;
}

 后面是WinMain函数

#include<windows.h>
#include<stdio.h>

LRESULT CALLBACK WinSunProc(
	HWND hwnd,//handle to window
	UINT uMsg,//message identifier
	WPARAM wParam,//first message parameter
	LPARAM lParam//second message parameter
);

int WINAPI WinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nCmdShow
)
{
	WNDCLASS wndcls;
	wndcls.cbClsExtra = 0;
	wndcls.cbWndExtra = 0;
	wndcls.hbrBackground = (HBRUSH)GetStockObject(SYSTEM_FONT);
	wndcls.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndcls.hIcon = LoadIcon(NULL, IDI_ERROR);
	wndcls.hInstance = hInstance;
	wndcls.lpfnWndProc = WinSunProc;
	wndcls.lpszClassName = NULL;
	wndcls.lpszMenuName = NULL;
	wndcls.style = CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&wndcls);

	HWND hWnd;
	hWnd = CreateWindow("Weixin2003", "王涛", WS_OVERLAPPEDWINDOW, 
		0, 0, 800, 600, NULL, NULL,hInstance, NULL);
	ShowWindow(hWnd, SW_SHOWNORMAL);
	UpdateWindow(hWnd);
	
	MSG msg;
	while(GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}

LRESULT CALLBACK WinSunProc(
	HWND hwnd,
	UINT uMsg,
	WPARAM wParam,
	LPARAM lParam
)
{
	switch (uMsg)
	{
	case WM_CHAR:
		char szChar[20];
		sprintf(szChar, "char is %d", wParam);
		MessageBox(hwnd, szChar, "weixin", 0);
		break;
	case WM_LBUTTONDOWN:
		MessageBox(hwnd, "mouse clicked", "weixin", 0);
HDC hdc;
hdc=GetDC(hwnd);
		TextOut(hdc, 0, 50, "惊涛骇浪", strlen("惊涛骇浪"));
		ReleaseDC(hwnd, hdc);
		break;
	case WM_PAINT:
		HDC hDC;
		PAINTSTRUCT ps;
		hDC = BeginPaint(hwnd, &ps);
		TextOut(hDC, 0, 0, "交大", strlen("交大"));
		EndPaint(hwnd, &ps);
		break;
	case WM_CLOSE:
		if(IDYES == MessageBox(hwnd, "是否真的结束", "weixin",
			MB_YESNO))
		{
			DestroyWindow(hwnd);
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
	}

	return 0;
}

 搞了这么久的MFC还是一头雾水，不过还好，总之要对MFC整体框架要有一个总得认识。

#include<windows.h>
#include<iostream.h>

DWORD WINAPI Fun1Proc(LPVOID lpParameter);
DWORD WINAPI Fun2Proc(LPVOID lpParameter);

HANDLE hMutex;

void main()
{
	HANDLE hThread1;
	HANDLE hThread2;
	
	hThread1 = CreateThread(NULL, 0, Fun1Proc, NULL, 0, NULL);
	hThread2 = CreateThread(NULL, 0, Fun2Proc, NULL, 0, NULL);
	
	
	CloseHandle(hThread1);
	CloseHandle(hThread2);
	
	//线程创建函数
	hMutex = CreateMutex(NULL, TRUE, "tickets");//创建一个互斥体
/*返回值类型Long，如执行成功，就返回互斥体对象的句柄；零表示出错。会设置GetLastError。即使返回的是一个有效句柄，但倘若指定的名字已经存在，GetLastError也会设为ERROR_ALREADY_EXISTS */
	
	if(hMutex)
	{
		if(ERROR_ALREADY_EXISTS == GetLastError())
		{
			cout << "only instance can run!"<<endl;
			return;
		}
	}
	WaitForSingleObject(hMutex, INFINITE);
	ReleaseMutex(hMutex);
	ReleaseMutex(hMutex);
	Sleep(4000);
}
DWORD WINAPI Fun1Proc(LPVOID lpParameter)
{
	while(1)
	{
		WaitForSingleObject(hMutex, INFINITE);
		cout << "thread1 is running" << endl;
		//return 0;
	}
}

DWORD WINAPI Fun2Proc(LPVOID lpParameter)
{
	while(1)
	{
		WaitForSingleObject(hMutex, INFINITE);
		cout<<"thread2 is running" << endl;
		//return 0;
	}
}