1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15#ifndef __RING_BUFFER_H__
16#define __RING_BUFFER_H__
17
18#include <atomic>
19#include <cstdlib>
20#include <cstdio>
21#include <condition_variable>
22#include <mutex>
23
24#include "macros_updater.h"
25
26namespace Updater {
27// for singleProducer singleConsumer
28class RingBuffer {
29    DISALLOW_COPY_MOVE(RingBuffer);
30public:
31    RingBuffer() = default;
32    virtual ~RingBuffer();
33    [[nodiscard]] bool Init(uint32_t singleSize, uint32_t num);
34    bool Push(uint8_t *buf, uint32_t len);
35    bool Pop(uint8_t *buf, uint32_t maxLen, uint32_t &len);
36    void Stop();
37    void StopPush();
38    void StopPop();
39    void Reset();
40private:
41    inline bool IsFull();
42    inline bool IsEmpty();
43    void Release();
44
45    uint32_t writeIndex_ = 0; // Producer
46    uint32_t readIndex_ = 0; // Consumer
47    uint32_t singleSize_ = 0; // single buf size
48    uint32_t num_ = 0;  // buffer num
49    uint8_t **bufArray_ = nullptr;
50    uint32_t *lenArray_ = nullptr;
51    bool isStop_ = false;
52    std::condition_variable notFull_;
53    std::condition_variable notEmpty_;
54    std::mutex notifyMtx_;
55};
56} // namespace Updater
57#endif // __RING_BUFFER_H__