临界区示例-MFC临界区类CCriticalSection

#include <afxmt.h>
CCriticalSection g_cs;
char g_cArray[10];

UINT ThreadProcFirst(LPVOID pParam);
UINT ThreadProcSecond(LPVOID pParam);

void CMfcCriticalSectionDlg::OnButton1()
{
    AfxBeginThread(ThreadProcFirst, NULL);
    AfxBeginThread(ThreadProcSecond, NULL);

    Sleep(300);
    /*Sleep(1000);*/
    
    CString strResult = CString(g_cArray);
    AfxMessageBox(strResult);
}

UINT ThreadProcFirst( LPVOID pParam )
{
    g_cs.Lock();
    printf("First");
    for (int i = 0; i < 10; ++i)
    {
        g_cArray[i] = 'a';
        Sleep(1);
    }

    g_cs.Unlock();
    return 0;
}

UINT ThreadProcSecond( LPVOID pParam )
{
    g_cs.Lock();
    printf("Second");
    for (int i = 0; i < 10; ++i)
    {
        g_cArray[10-i-1] = 'b';
        Sleep(1);
    }

    g_cs.Unlock();
    return 0;
}