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diff --git a/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.cpp b/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.cpp
new file mode 100644
index 0000000..15094f8
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/src/anbox/rpc/pending_call_cache.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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>
+ */
+
+#include "anbox/rpc/pending_call_cache.h"
+
+#include "anbox_rpc.pb.h"
+
+#ifdef USE_PROTOBUF_CALLBACK_HEADER
+#include <google/protobuf/stubs/callback.h>
+#endif
+
+namespace anbox {
+namespace rpc {
+PendingCallCache::PendingCallCache() {}
+
+void PendingCallCache::save_completion_details(
+    anbox::protobuf::rpc::Invocation const& invocation,
+    google::protobuf::MessageLite* response,
+    google::protobuf::Closure* complete) {
+  std::unique_lock<std::mutex> lock(mutex_);
+  pending_calls_[invocation.id()] = PendingCall(response, complete);
+}
+
+void PendingCallCache::populate_message_for_result(
+    anbox::protobuf::rpc::Result& result,
+    std::function<void(google::protobuf::MessageLite*)> const& populator) {
+  std::unique_lock<std::mutex> lock(mutex_);
+  populator(pending_calls_.at(result.id()).response);
+}
+
+void PendingCallCache::complete_response(anbox::protobuf::rpc::Result& result) {
+  PendingCall completion;
+
+  {
+    std::unique_lock<std::mutex> lock(mutex_);
+    auto call = pending_calls_.find(result.id());
+    if (call != pending_calls_.end()) {
+      completion = call->second;
+      pending_calls_.erase(call);
+    }
+  }
+
+  if (completion.complete) completion.complete->Run();
+}
+
+void PendingCallCache::force_completion() {
+  std::unique_lock<std::mutex> lock(mutex_);
+  for (auto& call : pending_calls_) {
+    auto& completion = call.second;
+    completion.complete->Run();
+  }
+
+  pending_calls_.erase(pending_calls_.begin(), pending_calls_.end());
+}
+
+bool PendingCallCache::empty() const {
+  std::unique_lock<std::mutex> lock(mutex_);
+  return pending_calls_.empty();
+}
+}  // namespace rpc
+}  // namespace anbox