SpinLock.hpp

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#pragma once
#include <Pothos/Config.hpp>
#include <atomic>

namespace Pothos {
namespace Util {

class POTHOS_API SpinLock
{
public:

    SpinLock(void);

    bool try_lock(void) noexcept;

    void lock(void) noexcept;

    void unlock(void) noexcept;

private:
    std::atomic_flag _lock;
};

} //namespace Util
} //namespace Pothos

inline Pothos::Util::SpinLock::SpinLock(void)
{
    this->unlock();
}

inline bool Pothos::Util::SpinLock::try_lock(void) noexcept
{
    return not _lock.test_and_set(std::memory_order_acquire);
}

inline void Pothos::Util::SpinLock::lock(void) noexcept
{
    while (not this->try_lock()){}
}

inline void Pothos::Util::SpinLock::unlock(void) noexcept
{
    _lock.clear(std::memory_order_release);
}