spinlock.hpp

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#pragma once
 
#include <yaclib_std/atomic>
 
namespace yaclib::detail {
 
template <typename T>
class Spinlock {
 public:
  void lock() noexcept {
    while (_state.exchange(1, std::memory_order_acquire) != 0) {
      do {
        // TODO(MBkkt) pause, yield, sleep
      } while (_state.load(std::memory_order_relaxed) != 0);
    }
  }
 
  void unlock() noexcept {
    _state.store(0, std::memory_order_release);
  }
 
 private:
  yaclib_std::atomic<T> _state = 0;
};
 
}  // namespace yaclib::detail