atomic_event.hpp

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#pragma once
 
#include <yaclib/fwd.hpp>
#include <yaclib/util/ref.hpp>
 
#include <yaclib_std/atomic>
 
namespace yaclib::detail {
 
class AtomicEvent {
 public:
  using Token = Unit;
 
  static Token Make() noexcept;
 
  void Wait(Token) noexcept;
 
  void Set() noexcept;
 
  void Reset() noexcept;
 
#if !defined(_LIBCPP_VERSION) || defined(__linux__) || (defined(_AIX) && !defined(__64BIT__))
  using wait_t = std::int32_t;
#else
  using wait_t = std::int64_t;
#endif
 private:
  yaclib_std::atomic<wait_t> _state = 0;
};
 
}  // namespace yaclib::detail