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#pragma once
#ifndef SPIN_LOCK_INL_H_
#error "Direct inclusion of this file is not allowed, include spin_lock.h"
// For the sake of sane code completion.
#include "spin_lock.h"
#endif
#undef SPIN_LOCK_INL_H_
#include "spin_wait.h"
#include <library/cpp/yt/assert/assert.h>
namespace NYT::NThreading {
////////////////////////////////////////////////////////////////////////////////
inline void TSpinLock::Acquire() noexcept
{
if (TryAcquire()) {
return;
}
AcquireSlow();
}
inline void TSpinLock::Release() noexcept
{
#ifdef NDEBUG
Value_.store(UnlockedValue, std::memory_order::release);
#else
YT_ASSERT(Value_.exchange(UnlockedValue, std::memory_order::release) != UnlockedValue);
#endif
NDetail::RecordSpinLockReleased();
}
inline bool TSpinLock::IsLocked() const noexcept
{
return Value_.load(std::memory_order::relaxed) != UnlockedValue;
}
inline bool TSpinLock::TryAcquire() noexcept
{
auto expectedValue = UnlockedValue;
#ifdef YT_ENABLE_SPIN_LOCK_OWNERSHIP_TRACKING
auto newValue = GetSequentialThreadId();
#else
auto newValue = LockedValue;
#endif
bool acquired = Value_.compare_exchange_weak(
expectedValue,
newValue,
std::memory_order::acquire,
std::memory_order::relaxed);
NDetail::RecordSpinLockAcquired(acquired);
return acquired;
}
inline bool TSpinLock::TryAndTryAcquire() noexcept
{
auto value = Value_.load(std::memory_order::relaxed);
#ifdef YT_ENABLE_SPIN_LOCK_OWNERSHIP_TRACKING
YT_ASSERT(value != GetSequentialThreadId());
#endif
if (value != UnlockedValue) {
return false;
}
return TryAcquire();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT::NThreading
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