CriticalSection临界区Demo

头文件

#include<windows.h>

关键接口

CRITICAL_SECTION cs;

InitializeCriticalSection(&cs);

EnterCriticalSection(&cs);

LeaveCriticalSection(&cs);

DeleteCriticalSectrion(&cs);

Demo1:

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

int main()
{
	CRITICAL_SECTION cs;
	InitializeCriticalSection(&cs);
	int nCount = 0;

	std::thread th1([&] {
		int nCnt = 0;
		while (nCnt++ < 1000)
		{
			EnterCriticalSection(&cs);
			Sleep(5);
			nCount++;
			std::cout << "th1 nCount: " << nCount << std::endl;
			LeaveCriticalSection(&cs);

		}
		});
	th1.detach();

	std::thread th2([&] {
		int nCnt = 0;
		while (nCnt++ < 1000)
		{
			EnterCriticalSection(&cs);
			Sleep(5);
			nCount++;
			std::cout << "th2 nCount: " << nCount << std::endl;
			LeaveCriticalSection(&cs);
		}
		});
	th2.detach();
	system("pause");
	return 0;
}

Demo2:

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

CRITICAL_SECTION cs;
int nCount = 0;

void thread_func1()
{
	int nCnt = 0;
	while (nCnt++ < 1000)
	{
		EnterCriticalSection(&cs);
		Sleep(1);
		nCount++;
		std::cout << "th1 nCount: " << nCount << std::endl;
		LeaveCriticalSection(&cs);
	}
}

void thread_func2()
{
	int nCnt = 0;
	while (nCnt++ < 1000)
	{
		EnterCriticalSection(&cs);
		Sleep(1);
		nCount++;
		std::cout << "th2 nCount: " << nCount << std::endl;
		LeaveCriticalSection(&cs);
	}
}

int main()
{
	InitializeCriticalSection(&cs);
	std::thread th1(thread_func1);
	th1.detach();

	std::thread th2(thread_func2);
	th2.detach();

	system("pause");
	return 0;
}