ringbuffer.h

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// SPDX-License-Identifier: AGPL-3.0-or-later
 
#ifndef __SOFTHDRINGBUFFER_H
#define __SOFTHDRINGBUFFER_H
 
#include <atomic>
#include <cstddef>
#include <vector>
 
class cSoftHdRingbuffer {
public:
    cSoftHdRingbuffer(size_t);
 
    void Reset(void);
    size_t Write(const void *, size_t);
    size_t GetWritePointer(void **);
    size_t WriteAdvance(size_t);
    size_t Read(void *, size_t);
    size_t GetReadPointer(const void **);
    size_t ReadAdvance(size_t);
    size_t FreeBytes(void);
    size_t UsedBytes(void);
 
private:
    std::vector<char> m_buffer;   
    char *m_pBuffer;              
 
    size_t m_size;                
 
    const char *m_pBufferEnd;     
    const char *m_pReadPointer;   
    char *m_pWritePointer;        
 
    // The only thing modified by both
    std::atomic<size_t> m_filled; 
};
 
#endif