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diff --git a/src/type3_AndroidCloud/anbox-master/src/anbox/graphics/buffer_queue.h b/src/type3_AndroidCloud/anbox-master/src/anbox/graphics/buffer_queue.h
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+// Copyright (C) 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ANBOX_GRAPHICS_BUFFER_QUEUE_H_
+#define ANBOX_GRAPHICS_BUFFER_QUEUE_H_
+
+#include "anbox/common/small_vector.h"
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+
+namespace anbox {
+namespace graphics {
+using Buffer = anbox::common::SmallFixedVector<char, 512>;
+
+class BufferQueue {
+ public:
+  BufferQueue(size_t capacity);
+
+  bool can_push_locked() const { return !closed_ && (count_ < capacity_); }
+  bool can_pop_locked() const { return count_ > 0U; }
+  bool is_closed_locked() const { return closed_; }
+
+  int wait_until_not_empty_locked(std::unique_lock<std::mutex> &lock);
+
+  int try_push_locked(Buffer &&buffer);
+  int push_locked(Buffer &&buffer, std::unique_lock<std::mutex> &lock);
+  int try_pop_locked(Buffer *buffer);
+  int pop_locked(Buffer *buffer, std::unique_lock<std::mutex> &lock);
+  void close_locked();
+
+ private:
+  size_t capacity_ = 0;
+  size_t pos_ = 0;
+  size_t count_ = 0;
+  bool closed_ = false;
+  std::unique_ptr<Buffer[]> buffers_;
+
+  std::condition_variable can_push_;
+  std::condition_variable can_pop_;
+};
+
+}  // namespace graphics
+}  // namespace anbox
+
+#endif