jnode-svn-commits Mailing List for JNode: new Java Operating System (Page 116)

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Revision: 2994
          http://jnode.svn.sourceforge.net/jnode/?rev=2994&view=rev
Author:   lsantha
Date:     2007-01-06 21:41:44 -0800 (Sat, 06 Jan 2007)

Log Message:
-----------
Classpath patches.

Modified Paths:
--------------
    trunk/core/src/classpath/java/java/lang/System.java
    trunk/core/src/classpath/java/java/security/PrivilegedExceptionAction.java
    trunk/core/src/classpath/vm/java/lang/Thread.java

Modified: trunk/core/src/classpath/java/java/lang/System.java
===================================================================

--- trunk/core/src/classpath/java/java/lang/System.java	2007-01-07 05:41:17 UTC (rev 2993)
+++ trunk/core/src/classpath/java/java/lang/System.java	2007-01-07 05:41:44 UTC (rev 2994)
@@ -44,6 +44,14 @@
 
 import java.io.InputStream;
 import java.io.PrintStream;
+import java.util.AbstractCollection;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.Properties;
 import java.util.PropertyPermission;
 
@@ -98,6 +106,11 @@
    public static final PrintStream err = VMSystem.makeStandardErrorStream();
 
   /**
+   * A cached copy of the environment variable map.
+   */
+  private static Map<String,String> environmentMap;
+
+  /**
    * This class is uninstantiable.
    */
   private System()
@@ -118,6 +131,7 @@
     SecurityManager sm = SecurityManager.current; // Be thread-safe.
     if (sm != null)
       sm.checkPermission(new RuntimePermission("setIO"));
+
     VMSystem.setIn(in);
     }
 
@@ -223,6 +237,38 @@
     }
 
   /**
+   * <p>
+   * Returns the current value of a nanosecond-precise system timer.
+   * The value of the timer is an offset relative to some arbitrary fixed
+   * time, which may be in the future (making the value negative).  This
+   * method is useful for timing events where nanosecond precision is
+   * required.  This is achieved by calling this method before and after the
+   * event, and taking the difference betweent the two times:
+   * </p>
+   * <p>
+   * <code>long startTime = System.nanoTime();</code><br />
+   * <code>... <emph>event code</emph> ...</code><br />
+   * <code>long endTime = System.nanoTime();</code><br />
+   * <code>long duration = endTime - startTime;</code><br />
+   * </p>
+   * <p>
+   * Note that the value is only nanosecond-precise, and not accurate; there
+   * is no guarantee that the difference between two values is really a
+   * nanosecond.  Also, the value is prone to overflow if the offset
+   * exceeds 2^63.
+   * </p>
+   *
+   * @return the time of a system timer in nanoseconds.
+   * @since 1.5
+   */
+  public static long nanoTime()
+  {
+      //todo
+      throw new RuntimeException("Implement it");
+    //return VMSystem.nanoTime();
+  }
+
+  /**
    * Copy one array onto another from <code>src[srcStart]</code> ...
    * <code>src[srcStart+len-1]</code> to <code>dest[destStart]</code> ...
    * <code>dest[destStart+len-1]</code>. First, the arguments are validated:
@@ -319,6 +365,7 @@
    * <dt>gnu.java.io.encoding_scheme_alias.iso-latin-_?</dt> <dd>8859_?</dd>
    * <dt>gnu.java.io.encoding_scheme_alias.latin?</dt>       <dd>8859_?</dd>
    * <dt>gnu.java.io.encoding_scheme_alias.utf-8</dt>        <dd>UTF8</dd>
+   * <dt>gnu.javax.print.server</dt>     <dd>Hostname of external CUPS server.</dd>
    * </dl>
      * 
    * @return the system properties, will never be null
@@ -364,7 +411,7 @@
     SecurityManager sm = SecurityManager.current; // Be thread-safe.
     if (sm != null)
       sm.checkPropertyAccess(key);
-    else if (key.length() == 0)
+    if (key.length() == 0)
       throw new IllegalArgumentException("key can't be empty");
     return SystemProperties.getProperty(key);
     }
@@ -385,6 +432,10 @@
     SecurityManager sm = SecurityManager.current; // Be thread-safe.
     if (sm != null)
       sm.checkPropertyAccess(key);
+    // This handles both the null pointer exception and the illegal
+    // argument exception.
+    if (key.length() == 0)
+      throw new IllegalArgumentException("key can't be empty");
     return SystemProperties.getProperty(key, def);
     }
 
@@ -405,6 +456,10 @@
     SecurityManager sm = SecurityManager.current; // Be thread-safe.
     if (sm != null)
       sm.checkPermission(new PropertyPermission(key, "write"));
+    // This handles both the null pointer exception and the illegal
+    // argument exception.
+    if (key.length() == 0)
+      throw new IllegalArgumentException("key can't be empty");
     return SystemProperties.setProperty(key, value);
     }
 

Modified: trunk/core/src/classpath/java/java/security/PrivilegedExceptionAction.java
===================================================================
--- trunk/core/src/classpath/java/java/security/PrivilegedExceptionAction.java	2007-01-07 05:41:17 UTC (rev 2993)
+++ trunk/core/src/classpath/java/java/security/PrivilegedExceptionAction.java	2007-01-07 05:41:44 UTC (rev 2994)
@@ -46,9 +46,9 @@
  *
  * @author Aaron M. Renn (ar...@ur...)
  * @since 1.1
- * @status updated to 1.4
+ * @status updated to 1.5
  */
-public interface PrivilegedExceptionAction
+public interface PrivilegedExceptionAction<T>
 {
   /**
    * This method performs an operation that requires higher privileges to
@@ -61,5 +61,5 @@
    * @see AccessController#doPrivileged(PrivilegedExceptionAction,
    *                                    AccessControlContext)
    */
-  Object run() throws Exception;
+  T run() throws Exception;
 } // interface PrivilegedExceptionAction

Modified: trunk/core/src/classpath/vm/java/lang/Thread.java
===================================================================
--- trunk/core/src/classpath/vm/java/lang/Thread.java	2007-01-07 05:41:17 UTC (rev 2993)
+++ trunk/core/src/classpath/vm/java/lang/Thread.java	2007-01-07 05:41:44 UTC (rev 2994)
@@ -262,6 +262,56 @@
         InheritableThreadLocal.newChildThread(this); // FDy : CLASSPATH patch ?
     }
 
+      /**
+   * Allocate a new Thread object, as if by
+   * <code>Thread(group, null, name)</code>, and give it the specified stack
+   * size, in bytes. The stack size is <b>highly platform independent</b>,
+   * and the virtual machine is free to round up or down, or ignore it
+   * completely.  A higher value might let you go longer before a
+   * <code>StackOverflowError</code>, while a lower value might let you go
+   * longer before an <code>OutOfMemoryError</code>.  Or, it may do absolutely
+   * nothing! So be careful, and expect to need to tune this value if your
+   * virtual machine even supports it.
+   *
+   * @param group the group to put the Thread into
+   * @param target the Runnable object to execute
+   * @param name the name for the Thread
+   * @param size the stack size, in bytes; 0 to be ignored
+   * @throws NullPointerException if name is null
+   * @throws SecurityException if this thread cannot access <code>group</code>
+   * @throws IllegalThreadStateException if group is destroyed
+   * @since 1.4
+   */
+  public Thread(ThreadGroup group, Runnable target, String name, long size)
+  {
+     Thread current = currentThread();
+
+        if (group != null) {
+            group.checkAccess();
+        } else {
+            group = current.getThreadGroup();
+        }
+
+        if (group == null) {
+            throw new InternalError("Live thread has invalid group: " + name);
+        }
+
+        group.addThread(this);
+
+        this.group = group;
+        this.target = target;
+        this.name = name;
+        this.parent = current;
+
+        this.daemon = current.isDaemon();
+
+        this.vmThread = VmProcessor.current().createThread(this);
+        this.vmThread.setPriority(current.getPriority());
+        this.vmThread.updateName();
+
+        InheritableThreadLocal.newChildThread(this); // FDy : CLASSPATH patch ?
+  }
+
     /**
      * Create a new instance with a given group as containing group, a runnable
      * as thread runner and a given name.


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jnode-svn-commits Mailing List for JNode: new Java Operating System (Page 116)

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