package org.simgrid.msg;
import java.util.Arrays;
-import java.util.Vector;
+import java.util.ArrayList;
/**
* A process may be defined as a code, with some private data, executing
* a native process. Even if this attribute is public you must never
* access to it. It is set automatically during the build of the object.
*/
- private long bind;
- /**
- * Indicates if the process is started
- */
- boolean started;
+ private long bind = 0;
+ /** Indicates if the process is started */
/**
* Even if this attribute is public you must never access to it.
* It is used to compute the id of an MSG process.
*/
- public static long nextProcessId = 0;
+ private static long nextProcessId = 0;
/**
* Even if this attribute is public you must never access to it.
/** Time at which the process should be created */
protected double startTime = 0;
- /** Time at which th
- * Kill time of the process
+ /** Time at which the process should be killed.
*
* Set at creation, and used internally by SimGrid
*/
private double killTime = -1;
- private String name;
+ private String name = null;
private int pid = -1;
private int ppid = -1;
private Host host = null;
- /** The arguments of the method function of the process. */
- public Vector<String> args;
-
-
- /**
- * Default constructor
- */
- protected Process() {
- this.id = nextProcessId++;
- this.name = null;
- this.bind = 0;
- this.args = new Vector<String>();
- }
-
+ /** The arguments of the method function of the process. */
+ private ArrayList<String> args = new ArrayList<>();
/**
* Constructs a new process from the name of a host and his name. The method
* function of the process doesn't have argument.
*
- * @param hostname The name of the host of the process to create.
+ * @param hostname Where to create the process.
* @param name The name of the process.
*
* @exception HostNotFoundException if no host with this name exists.
* Constructs a new process from the name of a host and his name. The arguments
* of the method function of the process are specified by the parameter args.
*
- * @param hostname The name of the host of the process to create.
+ * @param hostname Where to create the process.
* @param name The name of the process.
* @param args The arguments of the main function of the process.
*
* @exception HostNotFoundException if no host with this name exists.
- * NativeException
- * @throws NativeException
*
*/
- public Process(String hostname, String name, String args[]) throws HostNotFoundException, NativeException {
+ public Process(String hostname, String name, String[] args) throws HostNotFoundException {
this(Host.getByName(hostname), name, args);
}
/**
* Constructs a new process from a host and his name. The method function of the
* process doesn't have argument.
*
- * @param host The host of the process to create.
+ * @param host Where to create the process.
* @param name The name of the process.
*
*/
* Constructs a new process from a host and his name, the arguments of here method function are
* specified by the parameter args.
*
- * @param host The host of the process to create.
+ * @param host Where to create the process.
* @param name The name of the process.
* @param args The arguments of main method of the process.
*/
- public Process(Host host, String name, String[]args) {
- this();
- this.host = host;
+ public Process(Host host, String name, String[]args)
+ {
+ if (host == null)
+ throw new NullPointerException("Cannot create a process on the null host");
if (name == null)
- throw new NullPointerException("Process name cannot be NULL");
+ throw new NullPointerException("Process name cannot be null");
+
+ this.id = nextProcessId++;
+ this.host = host;
this.name = name;
- this.args = new Vector<String>();
+ this.args = new ArrayList<>();
if (null != args)
this.args.addAll(Arrays.asList(args));
- }
+ }
/**
* Constructs a new process from a host and his name, the arguments of here method function are
* specified by the parameter args.
*
- * @param host The host of the process to create.
+ * @param host Where to create the process.
* @param name The name of the process.
* @param args The arguments of main method of the process.
* @param startTime Start time of the process
*
*/
public Process(Host host, String name, String[]args, double startTime, double killTime) {
- this();
- this.host = host;
- if (name == null)
- throw new NullPointerException("Process name cannot be NULL");
- this.name = name;
-
- this.args = new Vector<String>();
- if (null != args)
- this.args.addAll(Arrays.asList(args));
-
+ this(host, name, args);
this.startTime = startTime;
- this.killTime = killTime;
+ this.killTime = killTime;
}
/**
- * The natively implemented method to create an MSG process.
- * @param hostName A valid (bound) host where create the process.
+ * The native method to create an MSG process.
+ * @param host where to create the process.
*/
- protected native void create(String hostName) throws HostNotFoundException;
+ protected native void create(Host host);
+
/**
* This method kills all running process of the simulation.
*
* SimGrid sometimes have issues when you kill processes that are currently communicating and such. We are working on it to fix the issues.
*/
public native void kill();
+ public static void kill(Process p) {
+ p.kill();
+ }
/** Suspends the process. See {@link #resume()} to resume it afterward */
public native void suspend();
public native void resume();
/** Tests if a process is suspended.
*
- * @see {@link #suspend()} and {@link #resume()}
- */
+ * @see #suspend()
+ * @see #resume()
+ */
public native boolean isSuspended();
+ /** Yield the current process. All other processes that are ready at the same timestamp will be executed first */
+ public static native void yield();
+
/**
* Specify whether the process should restart when its host restarts after a failure
*
/**
* This static method gets a process from a PID.
*
- * @param PID The process identifier of the process to get.
+ * @param pid The process identifier of the process to get.
*
* @return The process with the specified PID.
- *
- * @exception NativeException on error in the native SimGrid code
*/
- public static native Process fromPID(int PID) throws NativeException;
+ public static native Process fromPID(int pid);
/**
* This method returns the PID of the process.
*
*/
public native void migrate(Host host);
/**
- * Makes the current process sleep until millis millisecondes have elapsed.
+ * Makes the current process sleep until millis milliseconds have elapsed.
* You should note that unlike "waitFor" which takes seconds, this method takes milliseconds.
* FIXME: Not optimal, maybe we should have two native functions.
* @param millis the length of time to sleep in milliseconds.
* milliseconds and nanoseconds.
* Overloads Thread.sleep.
* @param millis the length of time to sleep in milliseconds.
- * @param nanos additionnal nanoseconds to sleep.
+ * @param nanos additional nanoseconds to sleep.
*/
- public native static void sleep(long millis, int nanos) throws HostFailureException;
+ public static native void sleep(long millis, int nanos) throws HostFailureException;
/**
* Makes the current process sleep until time seconds have elapsed.
* @param seconds The time the current process must sleep.
* @throws HostNotFoundException
*/
public final void start() throws HostNotFoundException {
- if (!started) {
- started = true;
- create(host.getName());
- }
+ if (bind == 0)
+ create(host);
}
- /**
- * This method runs the process. Il calls the method function that you must overwrite.
- */
+ /** This method runs the process. It calls the method function that you must overwrite. */
+ @Override
public void run() {
String[] args = null; /* do not fill it before the signal or this.args will be empty */
- //waitSignal(); /* wait for other people to fill the process in */
try {
args = new String[this.args.size()];
- if (this.args.size() > 0) {
+ if (!this.args.isEmpty()) {
this.args.toArray(args);
}
this.main(args);
- } catch(MsgException e) {
+ }
+ catch(MsgException e) {
e.printStackTrace();
Msg.info("Unexpected behavior. Stopping now");
System.exit(1);
}
catch(ProcessKilledError pk) {
+ /* The process was killed before its end. With a kill() or something. */
}
- exit();
}
/**
*/
public abstract void main(String[]args) throws MsgException;
- public native void exit();
+ /** Stops the execution of the current actor */
+ public void exit() {
+ this.kill();
+ }
/**
* Class initializer, to initialize various JNI stuff
*/
private static native void nativeInit();
static {
- Msg.nativeInit();
+ org.simgrid.NativeLib.nativeInit();
nativeInit();
}
/**
*
* @return The count of the running processes
*/
- public native static int getCount();
+ public static native int getCount();
}
