public void MathCallback(IAsyncResult iar)
{
MathFunctionToCall mc = (MathFunctionToCall)iar.AsyncState;
double result = mc.EndInvoke(iar);
Console.WriteLine("Function value = {0}", result);
}
WaitHandle DoInvoke(MathFunctionToCall mathFunc, double value)
{
AsyncCallTracker callTracker = new AsyncCallTracker(mathFunc);
AsyncCallback cb = new AsyncCallback(MathCallback);
IAsyncResult asyncResult = mathFunc.BeginInvoke(value, cb, callTracker);
return(callTracker.DoneEvent);
}
public void MathCallback(IAsyncResult iar)
{
AsyncCallTracker callTracker = (AsyncCallTracker)iar.AsyncState;
MathFunctionToCall func = (MathFunctionToCall)callTracker.Function;
double result = func.EndInvoke(iar);
Console.WriteLine("Function value = {0}", result);
callTracker.DoneEvent.Set();
}
WaitHandle DoInvoke(MathFunctionToCall mathFunc, double value)
{
AsyncCallback cb = new AsyncCallback(MathCallback);
IAsyncResult asyncResult =
mathFunc.BeginInvoke(value, cb, mathFunc);
return(asyncResult.AsyncWaitHandle);
}
public void CallMathCallback(MathFunctionToCall mathFunc,
double start,
double end,
double increment)
{
AsyncCallback cb = new AsyncCallback(MathCallback);
while (start < end)
{
Console.WriteLine("BeginInvoke: {0}", start);
mathFunc.BeginInvoke(start, cb, mathFunc);
start += increment;
}
}
public void CallMathCallback(MathFunctionToCall mathFunc)
{
WaitHandle[] waitArray = new WaitHandle[4];
Console.WriteLine("Begin Invoke");
waitArray[0] = DoInvoke(mathFunc, 0.1);
waitArray[1] = DoInvoke(mathFunc, 0.5);
waitArray[2] = DoInvoke(mathFunc, 1.0);
waitArray[3] = DoInvoke(mathFunc, 3.14159);
Console.WriteLine("Begin Invoke Done");
Console.WriteLine("Waiting for completion");
WaitHandle.WaitAll(waitArray, 10000, false);
Console.WriteLine("Completion achieved");
}
