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diff --git a/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.h b/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.h
new file mode 100644
index 0000000..f35ef9a
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright © 2012 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authored by: Alan Griffiths <alan@octopull.co.uk>
+ */
+
+#ifndef ANBOX_RPC_PENDING_CALL_CACHE_
+#define ANBOX_RPC_PENDING_CALL_CACHE_
+
+#include <functional>
+#include <map>
+#include <mutex>
+
+namespace google {
+namespace protobuf {
+class Closure;
+class MessageLite;
+}  // namespace protobuf
+}  // namespace google
+
+namespace anbox {
+namespace protobuf {
+namespace rpc {
+class Invocation;
+class Result;
+}  // namespace rpc
+}  // namespace protobuf
+namespace rpc {
+class PendingCallCache {
+ public:
+  PendingCallCache();
+
+  void save_completion_details(
+      anbox::protobuf::rpc::Invocation const &invocation,
+      google::protobuf::MessageLite *response,
+      google::protobuf::Closure *complete);
+  void populate_message_for_result(
+      anbox::protobuf::rpc::Result &result,
+      std::function<void(google::protobuf::MessageLite *)> const &populator);
+  void complete_response(anbox::protobuf::rpc::Result &result);
+  void force_completion();
+  bool empty() const;
+
+ private:
+  struct PendingCall {
+    PendingCall(google::protobuf::MessageLite *response,
+                google::protobuf::Closure *target)
+        : response(response), complete(target) {}
+
+    PendingCall() : response(0), complete() {}
+
+    google::protobuf::MessageLite *response;
+    google::protobuf::Closure *complete;
+  };
+
+  std::mutex mutable mutex_;
+  std::map<int, PendingCall> pending_calls_;
+};
+}  // namespace rpc
+}  // namespace anbox
+
+#endif