Example #1
0
        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 CriticalSectionImpl(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);
        }
Example #2
0
        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();
            }
        }