多线程Mutex'sExample

/**Date:31/oct/2013*Author:pjgan*Complier:VC++2008*Theme: Study the Thread,the example is to sell the tickets;*/CRITICAL_SECTION g_cs;bool  g_isSellOut = false;HANDLE hMutex; DWORD WINAPI Thread1Proc(LPVOID lpParameter); DWORD WINAPI Thread2Proc(LPVOID lpParameter);class Ticket{public:    Ticket();    void Sell();    ~Ticket();private:    int ticketnum; };Ticket::Ticket():ticketnum(100){     InitializeCriticalSection(&g_cs);      /*     *Param: the 2nd param is about the current thread is owned, if true,the owner is who call the thread; or no any;     */    hMutex = CreateMutex( NULL, false, NULL );    if( !hMutex )    {        throw std::runtime_error("Build Event failed!");    }}void Ticket::Sell(){    if( ticketnum > 0 ) {        std::cout<<"Ticket left "<< ticketnum-- <<std::endl;      }    else    {        std::cout<<"All ticket has sold out!"<<std::endl;        g_isSellOut = true;    }    }Ticket::~Ticket(){    CloseHandle( hMutex );    DeleteCriticalSection(&g_cs);}Ticket ticket;int main() {    HANDLE hThread1=CreateThread( NULL, 0, Thread1Proc, 0, 0, NULL );     HANDLE hThread2=CreateThread( NULL, 0, Thread2Proc, 0, 0, NULL );    WaitForSingleObject( hThread1, INFINITE );     WaitForSingleObject( hThread2, INFINITE );     CloseHandle(hThread1);     CloseHandle(hThread2);     return 0;} DWORD WINAPI Thread1Proc(LPVOID lpParameter) {     /*    *waitforsinglobject:wait for the hEvent is triggered;    */    WaitForSingleObject( hMutex ,INFINITE );    EnterCriticalSection(&g_cs);     while (!g_isSellOut)     {         ticket.Sell();    }     /*    *ReleaseMutex:let other threads goes on     */    ReleaseMutex(hMutex);    LeaveCriticalSection(&g_cs);     return 0; } DWORD WINAPI Thread2Proc(LPVOID lpParameter) {        WaitForSingleObject( hMutex ,INFINITE );    EnterCriticalSection(&g_cs);     while (!g_isSellOut)     {         ticket.Sell();    }     ReleaseMutex(hMutex);    LeaveCriticalSection(&g_cs);     return 0; }