spin_lock.h

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#ifndef CPPCOMMON_THREADS_SPIN_LOCK_H
#define CPPCOMMON_THREADS_SPIN_LOCK_H
 
#include "threads/locker.h"
#include "time/timestamp.h"
 
#include <atomic>
 
namespace CppCommon {
 
 
class SpinLock
{
public:
    SpinLock() noexcept : _lock(false) {}
    SpinLock(const SpinLock&) = delete;
    SpinLock(SpinLock&&) = delete;
    ~SpinLock() = default;
 
    SpinLock& operator=(const SpinLock&) = delete;
    SpinLock& operator=(SpinLock&&) = delete;
 
 
    bool IsLocked() noexcept;
 
 
    bool TryLock() noexcept;
 
 
    bool TryLockSpin(int64_t spin) noexcept;
 
 
    bool TryLockFor(const Timespan& timespan) noexcept;
 
    bool TryLockUntil(const UtcTimestamp& timestamp) noexcept
    { return TryLockFor(timestamp - UtcTimestamp()); }
 
 
    void Lock() noexcept;
 
 
    void Unlock() noexcept;
 
private:
    std::atomic<bool> _lock;
};
 
} // namespace CppCommon
 
#include "spin_lock.inl"
 
#endif // CPPCOMMON_THREADS_SPIN_LOCK_H