named_rw_lock.h

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#ifndef CPPCOMMON_THREADS_NAMED_RW_LOCK_H
#define CPPCOMMON_THREADS_NAMED_RW_LOCK_H
 
#include "threads/locker.h"
#include "time/timestamp.h"
 
#include <memory>
#include <string>
 
namespace CppCommon {
 
 
class NamedRWLock
{
public:
 
    explicit NamedRWLock(const std::string& name);
    NamedRWLock(const NamedRWLock&) = delete;
    NamedRWLock(NamedRWLock&& lock) = delete;
    ~NamedRWLock();
 
    NamedRWLock& operator=(const NamedRWLock&) = delete;
    NamedRWLock& operator=(NamedRWLock&& lock) = delete;
 
    const std::string& name() const;
 
 
    bool TryLockRead();
 
    bool TryLockWrite();
 
    bool TryConvertWriteToRead();
 
 
    bool TryLockReadFor(const Timespan& timespan);
 
    bool TryLockWriteFor(const Timespan& timespan);
 
    bool TryConvertWriteToReadFor(const Timespan& timespan);
 
    bool TryLockReadUntil(const UtcTimestamp& timestamp)
    { return TryLockReadFor(timestamp - UtcTimestamp()); }
 
    bool TryLockWriteUntil(const UtcTimestamp& timestamp)
    { return TryLockWriteFor(timestamp - UtcTimestamp()); }
 
    bool TryConvertWriteToReadUntil(const UtcTimestamp& timestamp)
    { return TryConvertWriteToReadFor(timestamp - UtcTimestamp()); }
 
 
    void LockRead();
 
    void LockWrite();
 
 
    void UnlockRead();
 
    void UnlockWrite();
 
 
    void ConvertWriteToRead();
 
private:
    class Impl;
 
    Impl& impl() noexcept { return reinterpret_cast<Impl&>(_storage); }
    const Impl& impl() const noexcept { return reinterpret_cast<Impl const&>(_storage); }
 
    static const size_t StorageSize = 184;
    static const size_t StorageAlign = 8;
    alignas(StorageAlign) std::byte _storage[StorageSize];
};
 
} // namespace CppCommon
 
#endif // CPPCOMMON_THREADS_NAMED_RW_LOCK_H