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+/*
+ * Copyright (c) 2020-2022 Arm Limited.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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
+ *
+ * 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 MESSAGE_QUEUE_H
+#define MESSAGE_QUEUE_H
+
+#include <cstddef>
+#include <ethosu_core_interface.h>
+
+namespace MessageQueue {
+
+template <uint32_t SIZE>
+struct Queue {
+ EthosU::ethosu_core_queue_header header;
+ uint8_t data[SIZE];
+
+ constexpr Queue() : header({SIZE, 0, 0}) {}
+
+ constexpr EthosU::ethosu_core_queue *toQueue() {
+ return reinterpret_cast<EthosU::ethosu_core_queue *>(&header);
+ }
+};
+
+class QueueImpl {
+public:
+ struct Vec {
+ const void *base;
+ size_t length;
+ };
+
+ QueueImpl(EthosU::ethosu_core_queue &queue);
+
+ bool empty() const;
+ size_t available() const;
+ size_t capacity() const;
+ void reset();
+ bool read(uint8_t *dst, uint32_t length);
+ template <typename T>
+ bool read(T &dst) {
+ return read(reinterpret_cast<uint8_t *>(&dst), sizeof(dst));
+ }
+ bool write(const Vec *vec, size_t length);
+ bool write(const uint32_t type, const void *src = nullptr, uint32_t length = 0);
+ template <typename T>
+ bool write(const uint32_t type, const T &src) {
+ return write(type, reinterpret_cast<const void *>(&src), sizeof(src));
+ }
+
+private:
+ void cleanHeader() const;
+ void cleanHeaderData() const;
+ void invalidateHeader() const;
+ void invalidateHeaderData() const;
+
+ EthosU::ethosu_core_queue &queue;
+};
+} // namespace MessageQueue
+
+#endif