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;
}