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- #pragma once
- #include "IBuffer.h"
-
- #include <QByteArray>
- #include <QMutex>
- #include <QMutexLocker>
- #include <QWaitCondition>
-
- class ConstBuffer : public IBuffer
- {
- public:
- // 构造函数包含四个参数：
- // 1. 缓冲区长度
- // 2. 是否等待读数据
- // 3. 是否等待写数据
- // 4. 固定帧长度
- explicit ConstBuffer(unsigned long bufLength, bool readWait, bool writeWait,
- unsigned short frameLength);
- ~ConstBuffer();
- int write(unsigned char* data, unsigned short length); // 写数据
- unsigned short read(unsigned char* data, unsigned short length); // 读数据
- void clear();
-
- private:
- unsigned char* m_pBuffer;
- unsigned long m_iBufferLength; // 缓冲区长度
- unsigned short m_iFrameLength; // 帧长
-
- unsigned long m_iReadIndex; // 读索引
- unsigned long m_iWriteIndex; // 写索引
-
- QMutex m_mutex;
- bool m_bIsOneCycle; // 是否在一圈内
-
- bool m_bReadWait; // 读等待
- bool m_bWriteWait; // 写等待
-
- QWaitCondition m_condRead;
- QWaitCondition m_condWrite;
-
- private:
- inline unsigned short GetFrameLength() override
- {
- return m_iFrameLength;
- }
- bool verifyFrameLength(unsigned char* buf, unsigned short length); // 验证帧长
- bool IsFull(unsigned short length) override;
- bool IsEmpty(unsigned short length) override;
- };
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