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+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef NET_GRPC_NODE_COMPLETION_QUEUE_ASYNC_WORKER_H_
+#define NET_GRPC_NODE_COMPLETION_QUEUE_ASYNC_WORKER_H_
+#include <nan.h>
+
+#include "grpc/grpc.h"
+
+namespace grpc {
+namespace node {
+
+/* A worker that asynchronously calls completion_queue_next, and queues onto the
+ node event loop a call to the function stored in the event's tag. */
+class CompletionQueueAsyncWorker : public NanAsyncWorker {
+ public:
+ CompletionQueueAsyncWorker();
+
+ ~CompletionQueueAsyncWorker();
+ /* Calls completion_queue_next with the provided deadline, and stores the
+ event if there was one or sets an error message if there was not */
+ void Execute();
+
+ /* Returns the completion queue attached to this class */
+ static grpc_completion_queue *GetQueue();
+
+ /* Convenience function to create a worker with the given arguments and queue
+ it to run asynchronously */
+ static void Next();
+
+ /* Initialize the CompletionQueueAsyncWorker class */
+ static void Init(v8::Handle<v8::Object> exports);
+
+ protected:
+ /* Called when Execute has succeeded (completed without setting an error
+ message). Calls the saved callback with the event that came from
+ completion_queue_next */
+ void HandleOKCallback();
+
+ private:
+ grpc_event *result;
+
+ static grpc_completion_queue *queue;
+};
+
+} // namespace node
+} // namespace grpc
+
+#endif // NET_GRPC_NODE_COMPLETION_QUEUE_ASYNC_WORKER_H_