130 lines
3.3 KiB
Java
130 lines
3.3 KiB
Java
// Runtime.java - Runtime class.
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.lang;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.StringTokenizer;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date August 27, 1998
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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* Status: All 1.1 methods exist. exec(), load(), and loadLibrary()
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* are not fully implemented.
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*/
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public class Runtime
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{
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public Process exec (String prog) throws IOException
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{
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return exec (prog, null);
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}
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public Process exec (String prog, String[] envp) throws IOException
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{
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StringTokenizer st = new StringTokenizer(prog);
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String[] a = new String[st.countTokens ()];
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for (int i = 0; i < a.length; i++)
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a[i] = st.nextToken ();
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return exec (a, envp);
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}
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public Process exec (String[] progarray) throws IOException
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{
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return exec (progarray, null);
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}
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public Process exec (String[] progarray, String[] envp) throws IOException
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{
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SecurityManager s = System.getSecurityManager();
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if (s != null)
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s.checkExec(progarray[0]);
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return new ConcreteProcess (progarray, envp);
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}
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private final static void checkExit (int status)
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{
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SecurityManager s = System.getSecurityManager();
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if (s != null)
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s.checkExit(status);
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}
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public native void exit (int status);
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public native long freeMemory ();
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public native void gc ();
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// Deprecated in 1.1. We implement what the JCL book says.
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public InputStream getLocalizedInputStream (InputStream in)
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{
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return in;
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}
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// Deprecated in 1.1. We implement what the JCL book says.
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public OutputStream getLocalizedOutputStream (OutputStream out)
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{
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return out;
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}
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public static Runtime getRuntime ()
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{
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return self;
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}
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private final void checkLink (String lib)
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{
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if (lib == null)
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throw new NullPointerException ();
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SecurityManager s = System.getSecurityManager();
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if (s != null)
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s.checkLink(lib);
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}
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public native void load (String pathname);
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public native void loadLibrary (String libname);
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public native void runFinalization ();
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// This method is static in JDK 1.1, but isn't listed as static in
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// the books. It is marked as static in the 1.2 docs.
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public static void runFinalizersOnExit (boolean run)
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{
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// The status we pass to the security check is unspecified.
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checkExit (0);
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self.finalize_on_exit = run;
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}
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public native long totalMemory ();
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public native void traceInstructions (boolean on);
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public native void traceMethodCalls (boolean on);
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// A helper for the constructor.
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private final native void init ();
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// The sole constructor.
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private Runtime ()
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{
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init ();
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}
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// Private data.
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private static Runtime self = new Runtime ();
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// FIXME: for now this can't be static. If it is, our compiler will
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// mark it as local, and it will be inaccessible to natRuntime.cc.
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private boolean finalize_on_exit;
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}
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