public static double GetPi(int numberOfThreads, int numberOfSteps, int numberOfSpins, int time, bool isEnter)
{
Thread[] threads = new Thread[numberOfThreads];
int steps = numberOfSteps;
timeout = time;
criticalSection = new ICriticalSectionImplementation(numberOfSpins);
int iterations = numberOfSteps / numberOfThreads;
pi = 0;
double step = 1.0 / steps;
for (int i = 0; i < numberOfThreads; ++i)
{
Thread thread = isEnter ? new Thread(CalculateWithEnter) : new Thread(CalculateWithTryEnter);
threads[i] = thread;
ArgsThread argsThread = new ArgsThread(i * iterations, (i + 1) * iterations, step);
thread.Start(argsThread);
}
for (int i = 0; i < numberOfThreads; ++i)
{
threads[i].Join();
}
return(pi);
}
private static void CalculateWithEnter(object arg)
{
if (arg.GetType() != typeof(ArgsThread))
{
throw new Exception("Incorrect type.");
}
ArgsThread argsThread = (ArgsThread)arg;
for (long i = argsThread.left; i < argsThread.right; ++i)
{
double x = (i + 0.5) * argsThread.step;
double value = 4.0 / (1 + x * x) * argsThread.step;
criticalSection.Enter();
pi += value;
criticalSection.Leave();
}
}
