seq_lock.h

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#ifndef CPPCOMMON_THREADS_SEQLOCK_H
#define CPPCOMMON_THREADS_SEQLOCK_H
 
#include <atomic>
#include <cstring>
 
namespace CppCommon {
 
 
template <typename T>
class SeqLock
{
public:
    SeqLock();
    explicit SeqLock(const T& data);
    SeqLock(const SeqLock&) = delete;
    SeqLock(SeqLock&&) = default;
    ~SeqLock() = default;
 
    SeqLock& operator=(const T& data) noexcept;
    SeqLock& operator=(const SeqLock&) = delete;
    SeqLock& operator=(SeqLock&&) = delete;
 
 
    T Read() const noexcept;
 
 
    void Write(const T& data) noexcept;
 
private:
    typedef char cache_line_pad[128];
 
    cache_line_pad _pad0;
    T _data;
    std::atomic<size_t> _seq;
    cache_line_pad _pad1;
};
 
} // namespace CppCommon
 
#include "seq_lock.inl"
 
#endif // CPPCOMMON_THREADS_SEQLOCK_H