Ejemplo n.º 1
0
void main()
 {
  int sum, list[3];
 
  printf("Enter three integers separated by spaces:\n");
  scanf("%d%d%d", &list[0], &list[1], &list[2]);

  sum = AddThree(list);

 printf("The sum of the three integers is: %d\n", sum);
 exit(0);
 }
// Main entry point
int __cdecl wmain()
{
    
    HRESULT hr = S_OK;
    
    // Some numbers to add asynchronously
    // Add has the behavior that if the second parameter is 0, it will perform synchronously
    int ints[] = 
    { 
        1, 0, 0, // First add sync,  second add sync
        2, 1, 0, // First add async, second add sync
        3, 0, 2, // First add sync,  second add async
        4, 3, 2, // First add async, second add async
    };
    
    // Set up the event that will get signalled each time AddThree is complete
    HANDLE handle = CreateEvent(NULL, FALSE, FALSE, NULL);
    if (handle == NULL)
    {
        goto Exit;
    }
    
    // Set up the callback to use when performing the addition asynchronously
    WS_ASYNC_CONTEXT addThreeComplete;
    addThreeComplete.callback = AddThreeComplete;
    addThreeComplete.callbackState = handle;
    
    // Declare private data for AddThree
    ADD_STATE addState;
    
    // Perform the additions synchronously and asynchronously
    for (ULONG loop = 0; loop < 2; loop++)
    {
        // Add sets of integers that will cause different execution behavior when added asynchronously
        for (ULONG i = 0; i < sizeof(ints) / sizeof(int); i += 3)
        {
            wprintf(L"Adding %d,%d,%d %s...\n", ints[i], ints[i + 1], ints[i + 2], (loop == 0 ? L"synchronously" : L"asynchronously"));
    
            // Set up how the function will be called
            WS_ASYNC_CONTEXT* asyncContext;
            if (loop == 0)
            {
                // Perform the addition synchronously
                asyncContext = NULL;
            }
            else
            {
                // Perform the addition asynchronously
                asyncContext = &addThreeComplete;
            }
    
            // Perform the addition
            int sum;
            hr = AddThree(&addState, ints[i], ints[i + 1], ints[i + 2], &sum, asyncContext, NULL);
    
            if (hr == WS_S_ASYNC)
            {
                // If the operation is being performed asynchronously, then wait for it to complete
                WaitForSingleObject(handle, INFINITE);
            }
            if (SUCCEEDED(hr))
            {
                wprintf(L"Result: %d\n", sum);
            }
            else
            {
                wprintf(L"AddThree failed.\n");
            }
        }
    }
    Exit:
    if (handle != NULL)
    {
        CloseHandle(handle);
    }
    fflush(stdout);
    return SUCCEEDED(hr) ? 0 : -1;
}