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vc++多线程编程,vc多线程编程


1.CWinApp是一个i额用户界面线程对象,派生自CWinThread,处理用户产生的事件和消息。

MFC
2.AfxBeginThread函数创建和初始化CWinThread对象,启动并返回地址。

3.
pThread = new CWinThread();
pThread->m_bAutoDelete = FALSE;
pThread = AfxBeginThread(StartAndCloseThreadProc, NULL);

4.
挂起线程
pThread->SuspendThread();
重新启动线程
pThread->ResumeThread();




5.
线程的同步
11.事件对象
#include "stdafx.h"
#include 
#include 
#include 
#include "process.h"

DWORD WINAPI ThreadProc1(LPVOID lpParam);
DWORD WINAPI ThreadProc2(LPVOID lpParam);
int iGolbalCount=0;
int iMax = 12;
HANDLE hEvent;

int main(int argc, char* argv[])
{
	HANDLE hThread1, hThread2;
	hEvent=CreateEvent(NULL,FALSE,FALSE,LPCTSTR("iGolbalCount"));
	if (hEvent == NULL) 
	{
		printf("创建事件对象失败!\r\n");
		return 0;		
	}

	SetEvent(hEvent);
 
	hThread1=CreateThread(NULL,0,ThreadProc1,NULL,0,NULL);
	hThread2=CreateThread(NULL,0,ThreadProc2,NULL,0,NULL);

	Sleep(40000); 
	CloseHandle(hEvent);	//关闭事件对象句柄
	printf("主线程结束!\n");
	system("pause");
	return 0;
}


DWORD WINAPI ThreadProc1(LPVOID lpParam)
{
	while (TRUE)
	{
		WaitForSingleObject(hEvent,INFINITE);		
		if (iGolbalCount < iMax)
		{
			printf("这里是线程1,iGolbalCount=%d\r\n", iGolbalCount++);			
			SetEvent(hEvent);
		}
		else
		{
			SetEvent(hEvent);
			break;
		}
		Sleep(10);
	}
	return 0;
}

DWORD WINAPI ThreadProc2(LPVOID lpParameter)
{
	while (TRUE)
	{
		WaitForSingleObject(hEvent,INFINITE);		
		if (iGolbalCount < iMax)
		{
			printf("这里是线程2,iGolbalCount=%d\r\n", iGolbalCount++);			
			SetEvent(hEvent);
		}
		else
		{
			SetEvent(hEvent);
			break;
		}
		Sleep(10);
	}
	return 0;
}



22.利用临界区
DWORD WINAPI ThreadProc1(LPVOID lpParam);
DWORD WINAPI ThreadProc2(LPVOID lpParam);
int iGolbalCount=0;
int iMax = 12;
CRITICAL_SECTION cs;

int main(int argc, char* argv[])
{
	HANDLE hThread1, hThread2; 
	InitializeCriticalSection(&cs);
	hThread1=CreateThread(NULL,0,ThreadProc1,NULL,0,NULL);
	hThread2=CreateThread(NULL,0,ThreadProc2,NULL,0,NULL);	
	Sleep(50000); 
	DeleteCriticalSection(&cs);	//删除临界区对象
	printf("主线程结束!\n");
	return 0;
}


DWORD WINAPI ThreadProc1(LPVOID lpParam)
{
	while (TRUE)
	{
		EnterCriticalSection(&cs);	
		if (iGolbalCount < iMax)
		{
			printf("这里是线程1,iGolbalCount=%d\r\n", iGolbalCount++);			
			LeaveCriticalSection(&cs);
		}
		else
		{
			LeaveCriticalSection(&cs);
			break;
		}
		Sleep(10);
	}
	return 0;
}


33.利用信号量
DWORD WINAPI ThreadProc1(LPVOID lpParam);
DWORD WINAPI ThreadProc2(LPVOID lpParam);
int iGolbalCount=0;
int iMax = 12;
int cMax = 1;
HANDLE hSemaphore;

int main(int argc, char* argv[])
{
	HANDLE hThread1, hThread2; 
	hSemaphore = CreateSemaphore( NULL, cMax, cMax, NULL); 
	if (hSemaphore == NULL) 
	{
		printf("创建信号量对象失败");
		return 0;
	}

	hThread1=CreateThread(NULL,0,ThreadProc1,NULL,0,NULL);
	hThread2=CreateThread(NULL,0,ThreadProc2,NULL,0,NULL);
	Sleep(5000);
	printf("主线程结束!");
	system("pause");
	return 0;
}


DWORD WINAPI ThreadProc1(LPVOID lpParam)
{
	while (TRUE)
	{
		DWORD dwWaitResult = WaitForSingleObject(hSemaphore, 0L);
		if (dwWaitResult == WAIT_OBJECT_0)
		{		
			if (iGolbalCount < iMax)
			{
				printf("这里是线程1,iGolbalCount=%d\r\n", iGolbalCount++);			
				ReleaseSemaphore(hSemaphore, 1, NULL);
			}
			else
			{
				ReleaseSemaphore(hSemaphore, 1, NULL);
				break;
			}
		}
		Sleep(10);
	}
	return 0;
}


44.利用互斥对象
DWORD WINAPI ThreadProc1(LPVOID lpParam);
DWORD WINAPI ThreadProc2(LPVOID lpParam);
int iGolbalCount=0;
int iMax = 12;
HANDLE hMutex;

int main(int argc, char* argv[])
{
	HANDLE hThread1, hThread2;
	hThread1=CreateThread(NULL,0,ThreadProc1,NULL,0,NULL);
	hThread2=CreateThread(NULL,0,ThreadProc2,NULL,0,NULL);

	hMutex=CreateMutex(NULL,TRUE,LPCTSTR("iGolbalCount"));
	if (hMutex == NULL) 
	{
		printf("创建互斥对象失败!\r\n");
		return 0;
	}
	
	WaitForSingleObject(hMutex,INFINITE);
	ReleaseMutex(hMutex);
	ReleaseMutex(hMutex);
    Sleep(5000);
	printf("主线程结束!\n");
	return 0;
}


DWORD WINAPI ThreadProc1(LPVOID lpParam)
{
	while (TRUE)
	{
		WaitForSingleObject(hMutex,INFINITE);		
		if (iGolbalCount < iMax)
            printf("这里是线程1,iGolbalCount=%d\r\n", iGolbalCount++);
		else
            break;
		ReleaseMutex(hMutex);
		Sleep(10);
	}
	return 0;
}





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