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root/jsr166/jsr166/src/main/java/util/concurrent/ConcurrentMap.java

Comparing jsr166/src/main/java/util/concurrent/ConcurrentMap.java (file contents):
Revision 1.5 by dl, Sat Jul 19 15:36:22 2003 UTC vs.
Revision 1.6 by dl, Fri Aug 1 22:40:05 2003 UTC

#	Line 9 | Line 9 | import java.util.Map;
9
10		/**
11		* A {@link java.util.Map} providing an additional atomic
12	<	* <tt>putIfAbsent</tt> method.
12	>	* <tt>putIfAbsent</tt> and <tt>remove</tt> methods.
13		* @since 1.5
14		* @author Doug Lea
15		*/
#	Line 45 | Line 45 | public interface ConcurrentMap<K, V> ext
45		*
46		**/
47		V putIfAbsent(K key, V value);
48	+
49	+	/**
50	+	* Remove entry for key only if currently mapped to given value.
51	+	* Acts as
52	+	* <pre>
53	+	*  if (map.get(key) == value) map.remove(key);
54	+	* </pre>
55	+	* except that the action is performed atomically.
56	+	*/
57	+	boolean remove(K key, V value);
58	+
59		}

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