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verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 97 insertions, 0 deletions

diff --git a/libjava/classpath/external/jsr166/java/util/concurrent/CompletionService.java b/libjava/classpath/external/jsr166/java/util/concurrent/CompletionService.java
new file mode 100644
index 000000000..df9f719c4
--- /dev/null
+++ b/libjava/classpath/external/jsr166/java/util/concurrent/CompletionService.java
@@ -0,0 +1,97 @@
+/*
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/licenses/publicdomain
+ */
+
+package java.util.concurrent;
+
+/**
+ * A service that decouples the production of new asynchronous tasks
+ * from the consumption of the results of completed tasks.  Producers
+ * <tt>submit</tt> tasks for execution. Consumers <tt>take</tt>
+ * completed tasks and process their results in the order they
+ * complete.  A <tt>CompletionService</tt> can for example be used to
+ * manage asynchronous IO, in which tasks that perform reads are
+ * submitted in one part of a program or system, and then acted upon
+ * in a different part of the program when the reads complete,
+ * possibly in a different order than they were requested.
+ *
+ * <p>Typically, a <tt>CompletionService</tt> relies on a separate
+ * {@link Executor} to actually execute the tasks, in which case the
+ * <tt>CompletionService</tt> only manages an internal completion
+ * queue. The {@link ExecutorCompletionService} class provides an
+ * implementation of this approach.
+ *
+ * <p>Memory consistency effects: Actions in a thread prior to
+ * submitting a task to a {@code CompletionService}
+ * <a href="package-summary.html#MemoryVisibility"><i>happen-before</i></a>
+ * actions taken by that task, which in turn <i>happen-before</i>
+ * actions following a successful return from the corresponding {@code take()}.
+ *
+ */
+public interface CompletionService<V> {
+    /**
+     * Submits a value-returning task for execution and returns a Future
+     * representing the pending results of the task.  Upon completion,
+     * this task may be taken or polled.
+     *
+     * @param task the task to submit
+     * @return a Future representing pending completion of the task
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if the task is null
+     */
+    Future<V> submit(Callable<V> task);
+
+    /**
+     * Submits a Runnable task for execution and returns a Future
+     * representing that task.  Upon completion, this task may be
+     * taken or polled.
+     *
+     * @param task the task to submit
+     * @param result the result to return upon successful completion
+     * @return a Future representing pending completion of the task,
+     *         and whose <tt>get()</tt> method will return the given
+     *         result value upon completion
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if the task is null
+     */
+    Future<V> submit(Runnable task, V result);
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task, waiting if none are yet present.
+     *
+     * @return the Future representing the next completed task
+     * @throws InterruptedException if interrupted while waiting
+     */
+    Future<V> take() throws InterruptedException;
+
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task or <tt>null</tt> if none are present.
+     *
+     * @return the Future representing the next completed task, or
+     *         <tt>null</tt> if none are present
+     */
+    Future<V> poll();
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task, waiting if necessary up to the specified wait
+     * time if none are yet present.
+     *
+     * @param timeout how long to wait before giving up, in units of
+     *        <tt>unit</tt>
+     * @param unit a <tt>TimeUnit</tt> determining how to interpret the
+     *        <tt>timeout</tt> parameter
+     * @return the Future representing the next completed task or
+     *         <tt>null</tt> if the specified waiting time elapses
+     *         before one is present
+     * @throws InterruptedException if interrupted while waiting
+     */
+    Future<V> poll(long timeout, TimeUnit unit) throws InterruptedException;
+}