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#pragma once
#include "rw_spin_lock.h"
namespace NYT::NThreading {
////////////////////////////////////////////////////////////////////////////////
//! Wraps TReaderWriterSpinLock and additionally acquires a global fork lock (in read mode)
//! preventing concurrent forks from happening.
class TForkAwareReaderWriterSpinLock
{
public:
TForkAwareReaderWriterSpinLock() = default;
TForkAwareReaderWriterSpinLock(const TForkAwareReaderWriterSpinLock&) = delete;
TForkAwareReaderWriterSpinLock& operator =(const TForkAwareReaderWriterSpinLock&) = delete;
// TODO(babenko): make use of location.
explicit constexpr TForkAwareReaderWriterSpinLock(const ::TSourceLocation& /*location*/)
{ }
void AcquireReader() noexcept;
void ReleaseReader() noexcept;
void AcquireWriter() noexcept;
void ReleaseWriter() noexcept;
bool IsLocked() const noexcept;
bool IsLockedByReader() const noexcept;
bool IsLockedByWriter() const noexcept;
private:
TReaderWriterSpinLock SpinLock_;
};
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT::NThreading
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