[kaffe] CVS kaffe (dalibor): Implemented Thread.holdsLock

[Kaffe CVS]

PatchSet 4967 
Date: 2004/07/14 12:43:49
Author: dalibor
Branch: HEAD
Tag: (none) 
Log:
Implemented Thread.holdsLock

2004-07-13  Dalibor Topic  <robilad at kaffe.org>

        * libraries/javalib/java/lang/Thread.java
        (holdsLock): Implemented.

        Reported by: Jim Huang  <jserv at kaffe.org>

Members: 
	ChangeLog:1.2531->1.2532 
	libraries/javalib/java/lang/Thread.java:1.46->1.47 

Index: kaffe/ChangeLog
diff -u kaffe/ChangeLog:1.2531 kaffe/ChangeLog:1.2532
--- kaffe/ChangeLog:1.2531	Wed Jul 14 11:11:52 2004
+++ kaffe/ChangeLog	Wed Jul 14 12:43:49 2004
@@ -1,5 +1,12 @@
 2004-07-13  Dalibor Topic  <robilad at kaffe.org>
 
+	* libraries/javalib/java/lang/Thread.java
+	(holdsLock): Implemented.
+
+	Reported by: Jim Huang  <jserv at kaffe.org>
+	
+2004-07-13  Dalibor Topic  <robilad at kaffe.org>
+
 	* config/sparc/jit-sparc.def:
 	Fixed stray LOUT without closing brace.
 
Index: kaffe/libraries/javalib/java/lang/Thread.java
diff -u kaffe/libraries/javalib/java/lang/Thread.java:1.46 kaffe/libraries/javalib/java/lang/Thread.java:1.47
--- kaffe/libraries/javalib/java/lang/Thread.java:1.46	Sun Jul 11 13:33:25 2004
+++ kaffe/libraries/javalib/java/lang/Thread.java	Wed Jul 14 12:43:51 2004
@@ -484,4 +484,19 @@
 	context = cl;
 }
 
+public static boolean holdsLock(Object obj) {
+  // use obj.notify to check if the current thread holds
+  // the monitor of the object.
+  // if it doesn't, notify will throw an exception.
+  try {
+    obj.notify();
+    // okay, current thread holds lock
+    return true;
+  }
+  catch (IllegalMonitorStateException e) {
+    // it doesn't hold the lock
+    return false;
+  }
+}
+
 }