-/* Copyright (c) 2006-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2006-2018. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
import java.util.ArrayList;
/**
- * A process may be defined as a code, with some private data, executing
+ * A process may be defined as a code, with some private data, executing
* in a location (host). All the process used by your simulation must be
* declared in the deployment file (XML format).
- * To create your own process you must inherit your own process from this
- * class and override the method "main()". For example if you want to use
+ * To create your own process you must inherit your own process from this
+ * class and override the method "main()". For example if you want to use
* a process named Slave proceed as it :
*
* (1) import the class Process of the package simgrid.msg
* import simgrid.msg.Process;
- *
+ *
* public class Slave extends simgrid.msg.Process {
*
* (2) Override the method function
- *
+ *
* \verbatim
* public void main(String[] args) {
* System.out.println("Hello MSG");
* For the example, for the previous process Slave this file must contains a line :
* <process host="Maxims" function="Slave"/>, where Maxims is the host of the process
* Slave. All the process of your simulation are automatically launched and managed by Msg.
- * A process use tasks to simulate communications or computations with another process.
- * For more information see Task. For more information on host concept
+ * A process use tasks to simulate communications or computations with another process.
+ * For more information see Task. For more information on host concept
* see Host.
- *
+ *
*/
public abstract class Process implements Runnable {
* @param name The name of the process.
*
* @exception HostNotFoundException if no host with this name exists.
- *
+ *
*
*/
public Process(String hostname, String name) throws HostNotFoundException {
*
* @exception HostNotFoundException if no host with this name exists.
*
- */
+ */
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
+ * Constructs a new process from a host and his name. The method function of the
* process doesn't have argument.
*
* @param host Where to create the process.
*
* @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 argsParam The arguments of main method of the process.
*/
- public Process(Host host, String name, String[]args)
+ public Process(Host host, String name, String[]argsParam)
{
if (host == null)
throw new IllegalArgumentException("Cannot create a process on the null host");
this.name = name;
this.args = new ArrayList<>();
- if (null != args)
- this.args.addAll(Arrays.asList(args));
+ if (null != argsParam)
+ this.args.addAll(Arrays.asList(argsParam));
}
/**
* Constructs a new process from a host and his name, the arguments of here method function are
/**
* This method kills all running process of the simulation.
*
- * @param resetPID Should we reset the PID numbers. A negative number means no reset
- * and a positive number will be used to set the PID of the next newly
- * created process.
- *
* @return The function returns the PID of the next created process.
*
- */
- public static native int killAll(int resetPID);
+ */
+ public static native int killAll();
/** Simply kills the receiving process.
*
/**
* Specify whether the process should restart when its host restarts after a failure
- *
+ *
* A process naturally stops when its host stops. It starts again only if autoRestart is set to true.
* Otherwise, it just disappears when the host stops.
*/
/**
* Returns the host of the process.
* @return The host instance of the process.
- */
+ */
public Host getHost() {
return this.host;
}
* @param pid The process identifier of the process to get.
*
* @return The process with the specified PID.
- */
+ */
public static native Process fromPID(int pid);
/**
* This method returns the PID of the process.
*
* @return The PID of the process.
*
- */
+ */
public int getPID() {
+ if (pid == -1) // Don't traverse the JNI barrier if you already have the answer
+ pid = nativeGetPID();
return pid;
}
+ // This should not be used: the PID is supposed to be initialized from the C directly when the actor is created,
+ // but this sometimes fail, so let's play nasty but safe here.
+ private native int nativeGetPID();
/**
* This method returns the PID of the parent of a process.
*
* @return The PID of the parent of the process.
*
- */
+ */
public int getPPID() {
return ppid;
}
/**
- * Returns the value of a given process property.
+ * Returns the value of a given process property.
*/
public native String getProperty(String name);
*
* @return The current process.
*
- */
+ */
public static native Process getCurrentProcess();
/**
* Migrates a process to another host.
sleep(millis,0);
}
/**
- * Makes the current process sleep until millis milliseconds and nanos nanoseconds
+ * Makes the current process sleep until millis milliseconds and nanos nanoseconds
* have elapsed.
- * Unlike {@link #waitFor(double)} which takes seconds, this method takes
+ * Unlike {@link #waitFor(double)} which takes seconds, this method takes
* milliseconds and nanoseconds.
* Overloads Thread.sleep.
* @param millis the length of time to sleep in milliseconds.
/**
* Makes the current process sleep until time seconds have elapsed.
* @param seconds The time the current process must sleep.
- */
- public native void waitFor(double seconds) throws HostFailureException;
+ */
+ public native void waitFor(double seconds) throws HostFailureException;
/**
* This method actually creates and run the process.
* It is a noop if the process is already launched.
- * @throws HostNotFoundException
*/
public final void start() {
if (bind == 0)
@Override
public void run() {
- String[] args = null; /* do not fill it before the signal or this.args will be empty */
-
try {
- args = new String[this.args.size()];
- if (!this.args.isEmpty()) {
- this.args.toArray(args);
- }
+ String[] argsArray = new String[this.args.size()];
+ this.args.toArray(argsArray);
- this.main(args);
+ this.main(argsArray);
}
catch(MsgException e) {
e.printStackTrace();
* This static method returns the current amount of processes running
*
* @return The count of the running processes
- */
+ */
public static native int getCount();
}
