临界区线程对象的使用

临界区线程对象的使用

#include <windows.h>
#include <iostream>
using namespace std;

CRITICAL_SECTION g_cs;
bool g_bContinue = true;
int g_count1 = 0;
int g_count2 = 0;

DWORD WINAPI ThreadProc(LPVOID lpParameter);

int main()
{
	HANDLE g_hTrd[2];

	InitializeCriticalSection(&g_cs);     //This function initializes a critical section object. 
	
	g_hTrd[0] = CreateThread(NULL,0,ThreadProc,NULL,0,NULL);
	g_hTrd[1] = CreateThread(NULL,0,ThreadProc,NULL,0,NULL);
	
	WaitForMultipleObjects(2,g_hTrd,FALSE,1000); 
	g_bContinue = false;
	
	CloseHandle(g_hTrd[0]);
	CloseHandle(g_hTrd[1]);

	DeleteCriticalSection(&g_cs);       //This function releases all resources used by an unowned critical section object. 
	
	Sleep(1);
	cout << "g_count1 = " << g_count1 << "\t g_count2 = " << g_count2 << endl;
	return 0;
}


DWORD WINAPI ThreadProc(LPVOID lpParameter)
{
	while(g_bContinue)
	{
		//This function waits for ownership of the specified critical section object. 
		//The function returns when the calling thread is granted ownership. 
		EnterCriticalSection(&g_cs); 
		g_count1++;
		g_count2++;
		cout << "g_cnt1 = " << g_count1 << "\t g_cnt2 = " << g_count2 << endl;
		//This function releases ownership of the specified critical section object. 
LeaveCriticalSection(&g_cs);              	
}
	return 0;
}