SubscriberToken.hpp

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// Copyright (c) 2026 EduArt Robotik GmbH

 
#pragma once
 
#include <atomic>
#include <functional>
 
namespace eduart {
 
namespace subscription {

struct SubscriberToken {
  using TokenType = unsigned long long;

  SubscriberToken() noexcept : _value(0) {}

  bool isValid() const noexcept { return _value != 0; }

  static SubscriberToken getNextToken() noexcept {
    static std::atomic<TokenType> next_token{ 1 };
    return SubscriberToken(next_token++);
  }

  TokenType value() const noexcept { return _value; }

  bool operator==(const SubscriberToken& other) const noexcept { return _value == other._value; }

  bool operator!=(const SubscriberToken& other) const noexcept { return _value != other._value; }
 
private:
  SubscriberToken(TokenType value) noexcept : _value(value) {};
 
  TokenType _value;
};
 
} // namespace subscription
 
} // namespace eduart
 
#ifndef SWIG
namespace std {

template <> struct hash<eduart::subscription::SubscriberToken> {
  std::size_t operator()(const eduart::subscription::SubscriberToken& token) const noexcept { return std::hash<eduart::subscription::SubscriberToken::TokenType>{}(token.value()); }
};
 
} // namespace std
#endif // SWIG