Process and thread

/** @file assg02-sim.cpp * @brief System Test Simulator * * @author Derek Harter * @note cwid: 123456 * @date Fall 2019 * @note ide: g++ 8.2.0 / GNU Make 4.2.1 * * Command line invocation of Process Simulator, used to perform * system tests. Given a file that specifies the simulated events * that occur in our simulated system, we create a ProcessSimulator * simulator object and load and run the file to simulate the sequence * of events occurring that cause processes to be created, exit, * block, unblock, dispatch and timeout. */ #include "ProcessSimulator.hpp" #include "SimulatorException.hpp" #include <iostream> #include <string> using namespace std; /** * @brief usage * * Usage information for invoking simulator with command line * arguments. Print usage information and exit with non success * status to indicate error. */ void usage() { cout << "Usage: sim timeSliceQuantum events-file.sim" << endl << "Run process simulation on the given set of simulated process events file" << endl << endl << "timeSliceQuantum Parameter controlling the round robin time slicing" << endl << " simulated by the system. This is the maximum" << endl << " number of cpu cycles a process runs when scheduled" << endl << " on the cpu before being interrupted and returned" << endl << " back to the end of the ready queue" << endl << "events-file.sim A simulation definition file containing process" << endl << " events to be simulated." << endl; exit(1); } /** * @brief main entry point * * Entry point of the process simulator system test command line * program. This program is so small we do most all of our work here. * We parse command line arguments, and if successful we instantiate a * ProcessSimulator, load the indicated simulation events file, and * run the simulation. * * @param argc The command line argument count. This program requires * 3 command line arguments to run. * @param argv[] The command line argument values. argv[1] should be * the system timeSliceQuantum, and argv[2] should be the simulation * file to be loaded and executed. * * @return 0 is returned if simulation finishes successfully with no errors * or exceptions. A non-zero value is returned when an exception occurs * or whenever simulation terminates abnormally. */ int main(int argc, char** argv) { // parse command line arguments // if we do not get required command line arguments, print usage // and exit immediately. if (argc != 3) { usage(); } int timeSliceQuantum = atoi(argv[1]); string simFileName = string(argv[2]); // load the indicated simulation file and execute the program ProcessSimulator sim(timeSliceQuantum); try { sim.runSimulation(simFileName); } catch (const SimulatorException& e) { cerr << "Simulation run resulted in runtime error occurring:" << endl; cerr << e.what() << endl; exit(1); } // exit with 0 status code to indicate successful invocation of simulator return 0; }