- Make Scheduler::step_forward return a bool representing if
the step went okay or otherwise if the simulation ended - Fix simulation states in concrete_simulation.cc - Manage end of input (now CTRL+D exits the program, and you can redirect a file in input knowing that at EOF sgpemv2 will terminate) - Fix a bug in Scheduler that didn't add the newly created environment to History when the simulation ended, thus leading both to a memory leak and an inconsistency in representing the simulation git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@807 3ecf2c5c-341e-0410-92b4-d18e462d057c
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@ -82,98 +82,64 @@ ConcreteSimulation::run() throw(UserInterruptException, NullPolicyException)
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case state_stopped:
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_history.reset(true);
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break;
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default:
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;
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}
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_state = state_running;
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// chech for termination
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const Environment &env = _history.get_last_environment();
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const Environment::Processes& processes = env.get_processes();
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typedef Environment::Processes::const_iterator ProcessesIt;
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if(get_policy() == NULL)
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{
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stop();
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throw NullPolicyException("no policy selected");
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}
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//******* CONTINUOUS TIME
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if (_mode)
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{
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do
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{
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bool all_term = true;
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for(ProcessesIt it = processes.begin(); it != processes.end(); ++it)
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if((*it)->get_state() != Schedulable::state_terminated)
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{
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all_term = false;
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break;
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}
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//if there are no processes left the termination message has already been notified
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//by the last execution of upadate()
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if (all_term)
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{
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_state = state_stopped;
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return; // Exit from loop
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try
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{
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//step forward
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bool yet_to_finish = Scheduler::get_instance().step_forward(_history, *get_policy());
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if(!yet_to_finish) stop();
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//sleep
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Glib::usleep(_timer_interval*1000);
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}
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catch(UserInterruptException e)
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{
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stop();
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throw;
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}
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//check the state
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if (_state == state_stopped || _state == state_paused)
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return;
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}
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try
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{
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if(get_policy() == NULL)
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{
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stop();
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throw NullPolicyException("no policy selected");
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}
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//step forward
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Scheduler::get_instance().step_forward(_history, *get_policy());
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//sleep
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Glib::usleep(_timer_interval*1000);
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}
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catch(UserInterruptException e)
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{
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stop();
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throw;
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}
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//check the state
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if (_state == state_stopped || _state == state_paused)
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return;
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}
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while(true);
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}
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//******* STEP by STEP
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else
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{
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bool all_term = true;
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for(ProcessesIt it = processes.begin(); it != processes.end(); ++it)
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if((*it)->get_state() != Schedulable::state_terminated)
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try
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{
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all_term = false;
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break;
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assert(get_policy() != NULL);
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//step forward
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bool yet_to_finish = Scheduler::get_instance().step_forward(_history, *get_policy());
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if(yet_to_finish)
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pause();
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else
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stop();
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}
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if (all_term)
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//if there are no processes left the termination message has already been notified
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//by the last execution of upadate()
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_state = state_paused;
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else
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{
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try
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catch(UserInterruptException e)
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{
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assert(get_policy() != NULL);
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//step forward
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Scheduler::get_instance().step_forward(_history, *get_policy());
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}
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catch(UserInterruptException e)
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{
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throw;
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}
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}
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stop();
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throw;
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}
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}
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}
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Simulation::state
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@ -161,7 +161,7 @@ Scheduler::get_policy()
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}
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void
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bool
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Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterruptException)
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{
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// This very method should be exclusive: no concurrent behaviour, from when we
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@ -233,7 +233,9 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
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// ---------- FIXME ----------------
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// What to do now if the simulation ended?
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// Check correctness: Now if the simulation ended we
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// append the newly created environment and return false
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if(simulation_ended) goto final_cleanup;
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/* /
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@ -329,6 +331,8 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
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// - SimulationController that everything stopped
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throw;
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}
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final_cleanup:
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// append the new snapshot...
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// ...and remember to release the auto_ptr!
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@ -337,6 +341,9 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
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// Reset values that the policy doesn't need anymore
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_policy = NULL;
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_ready_queue = NULL;
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// If we got there, a step has been performed
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return simulation_ended == false;
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}
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@ -74,8 +74,10 @@ namespace sgpem
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Generates a new ReadyQueue representing the status of the processes
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at the simulation instant next to the current one, and extends the History by
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one instant with it.
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\return false If the simulation has ended, true otherwise
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*/
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void step_forward(History& history, Policy& cpu_policy) throw(UserInterruptException);
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bool step_forward(History& history, Policy& cpu_policy) throw(UserInterruptException);
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/**
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Returns the policy that will be used to generate the simulation at the next instant.
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@ -131,14 +131,11 @@ parse_options(int argc, char** argv)
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// initialize the command line version
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// of sgpemv2
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TextSimulation sim;
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while(1)
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{
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std::string str;
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getline(std::cin, str);
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TextSimulation::parse_command(sim, str);
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}
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std::string str;
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while(getline(std::cin, str))
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// Enter main loop
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TextSimulation::parse_command(sim, str);
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}
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else
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{
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@ -494,8 +494,7 @@ TextSimulation::on_help(const Tokens& arguments)
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"the cpu policy.\n\nThis is currently the only way to control the behaviour of "
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"cpu policies without modifying their source code.\n"));
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else if(command == "HELP")
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p_stdout(_("-- Do you really want me to explain what HELP means? --\n"
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" ************** YOU ARE JOKING ME !!! ************\n"));
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p_stdout(_("-- HELP COMMAND --\nThe help you're reading"));
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else if(command == "GET")
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p_stdout(_("-- GET COMMAND --\nSyntax: GET <attr_name>\n"
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"\twhere <attr_name> may be simulation-tick or continuous.\n"));
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@ -171,6 +171,7 @@ namespace sgpem
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std::vector<memory::smart_ptr<IOManager> > _devices;
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static void _io_loop(std::pair<TextSimulation*, int>);
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};
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}
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