🚀 go-pugleaf

"Tumurbaatar S." <nospam_tumur@magicnet.mn> wrote in message
news:41edea6b@newsgroups.borland.com...

> Is it not matter that I'm not using any synchronization methods?

Yes, it does matter.  Always synchronize accees to any data that is shared
by multiple threads, especially if one of the threads is altering the data.
In this particular case, the easiest way to synchronize access to a shared
integer is to use the Interlocked functions, such as InterlockedExchange and
InterlockedExchangeAdd():


    int my_var = 0;

    --- thread1 ---
    InterlockedExchange(&my_var, new_value);


    --- thread2 ---
    if( InterlockedExchangeAdd(&my_var, 0) != 0 ) ...


Otherwise, use a critical section instead:

    int my_var = 0;
    CRITICAL_SECTION cs = {0};

    --- program startup ---
    InitializeCriticalSection(&cs);

    --- program termination ---
    DeleteCriticalSection(&cs);

    --- thread1 ---
    EnterCriticalSection(&cs)
    my_var = new_value;
    LeaveCriticalSection(&cs)

    --- thread2 ---
    EnterCriticalSection(&cs);
    if( my_var != 0 ) ...
    LeaveCriticalSection(&cs);


Gambit