Ver el código de «cpp/header/mutex»

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{{cpp/header/title|mutex}}
{{cpp/header/navbar}}
Este archivo de encabezado es parte de la biblioteca de [[cpp/thread|soporte de hilos]].
{{dsc begin}}
{{dsc h1|Clases}}
{{dsc inc | cpp/thread/dsc mutex}}
{{dsc inc | cpp/thread/dsc timed_mutex}}
{{dsc inc | cpp/thread/dsc recursive_mutex}}
{{dsc inc | cpp/thread/dsc recursive_timed_mutex}}
{{dsc inc | cpp/thread/dsc lock_guard}}
{{dsc inc | cpp/thread/dsc unique_lock}}
{{dsc inc | cpp/thread/dsc scoped_lock}}
{{dsc inc | cpp/thread/dsc lock_tag_t}}
{{dsc inc | cpp/thread/dsc once_flag}}
{{dsc h1|Constantes}}
{{dsc inc | cpp/thread/dsc lock_tag}}
{{dsc h1|Funciones}}
{{dsc inc | cpp/thread/dsc try_lock}}
{{dsc inc | cpp/thread/dsc lock}}
{{dsc inc | cpp/thread/dsc call_once}}
{{dsc inc | cpp/thread/unique_lock/dsc swap2}}
{{dsc end}}

===Sinopsis===
{{source|1=
namespace std {
  class mutex;
  class recursive_mutex;
  class timed_mutex;
  class recursive_timed_mutex;

  struct defer_lock_t { explicit defer_lock_t() = default; };
  struct try_to_lock_t { explicit try_to_lock_t() = default; };
  struct adopt_lock_t { explicit adopt_lock_t() = default; };

  inline constexpr defer_lock_t  defer_lock { };
  inline constexpr try_to_lock_t try_to_lock { };
  inline constexpr adopt_lock_t  adopt_lock { };

  template<class Mutex> class lock_guard;
  template<class... MutexTypes> class scoped_lock;
  template<class Mutex> class unique_lock;

  template<class Mutex>
    void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y) noexcept;

  template<class L1, class L2, class... L3> int try_lock(L1&, L2&, L3&...);
  template<class L1, class L2, class... L3> void lock(L1&, L2&, L3&...);

  struct once_flag;

  template<class Callable, class... Args>
    void call_once(once_flag& flag, Callable&& func, Args&&... args);
}
}}

====Clase {{lc|std::mutex}}====
{{source|1=
namespace std {
  class mutex {
  public:
    constexpr mutex() noexcept;
    ~mutex();

    mutex(const mutex&) = delete;
    mutex& operator=(const mutex&) = delete;

    void lock();
    bool try_lock();
    void unlock();

    using native_handle_type = /* definido por la implementación */;
    native_handle_type native_handle();
  };
}
}}

====Clase {{lc|std::recursive_mutex}}====
{{source|1=
namespace std {
  class recursive_mutex {
  public:
    recursive_mutex();
    ~recursive_mutex();

    recursive_mutex(const recursive_mutex&) = delete;
    recursive_mutex& operator=(const recursive_mutex&) = delete;

    void lock();
    bool try_lock() noexcept;
    void unlock();

    using native_handle_type = /* definido por la implementación */;
    native_handle_type native_handle();
  };
}
}}

====Clase {{lc|std::timed_mutex}}====
{{source|1=
namespace std {
  class timed_mutex {
  public:
    timed_mutex();
    ~timed_mutex();

    timed_mutex(const timed_mutex&) = delete;
    timed_mutex& operator=(const timed_mutex&) = delete;

    void lock();    // bloqueo
    bool try_lock();
    template<class Rep, class Period>
      bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
    template<class Clock, class Duration>
      bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
    void unlock();

    using native_handle_type = /* definido por la implementación */;
    native_handle_type native_handle();
  };
}
}}

====Clase {{lc|std::recursive_timed_mutex}}====
{{source|1=
namespace std {
  class recursive_timed_mutex {
  public:
    recursive_timed_mutex();
    ~recursive_timed_mutex();

    recursive_timed_mutex(const recursive_timed_mutex&) = delete;
    recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete;

    void lock();    // bloqueo
    bool try_lock() noexcept;
    template<class Rep, class Period>
      bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
    template<class Clock, class Duration>
      bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
    void unlock();

    using native_handle_type = /* definido por la implementación */;
    native_handle_type native_handle();
  };
}
}}

====Plantilla de clase {{lc|std::lock_guard}}====
{{source|1=
namespace std {
  template<class Mutex>
  class lock_guard {
  public:
    using mutex_type = Mutex;

    explicit lock_guard(mutex_type& m);
    lock_guard(mutex_type& m, adopt_lock_t);
    ~lock_guard();

    lock_guard(const lock_guard&) = delete;
    lock_guard& operator=(const lock_guard&) = delete;

  private:
    mutex_type& pm;             // solo exposición
  };
}
}}

====Plantilla de clase {{lc|std::scoped_lock}}====
{{source|1=
namespace std {
  template<class... MutexTypes>
  class scoped_lock {
  public:
    using mutex_type = Mutex;   // Si MutexTypes... consiste en el tipo único Mutex

    explicit scoped_lock(MutexTypes&... m);
    explicit scoped_lock(adopt_lock_t, MutexTypes&... m);
    ~scoped_lock();

    scoped_lock(const scoped_lock&) = delete;
    scoped_lock& operator=(const scoped_lock&) = delete;

  private:
    tuple<MutexTypes&...> pm;   // solo exposición
  };
}
}}

====Plantilla de clase {{lc|std::unique_lock}}====
{{source|1=
namespace std {
  template<class Mutex>
  class unique_lock {
  public:
    using mutex_type = Mutex;

    // construcción, destrucción, copia
    unique_lock() noexcept;
    explicit unique_lock(mutex_type& m);
    unique_lock(mutex_type& m, defer_lock_t) noexcept;
    unique_lock(mutex_type& m, try_to_lock_t);
    unique_lock(mutex_type& m, adopt_lock_t);
    template<class Clock, class Duration>
      unique_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time);
    template<class Rep, class Period>
      unique_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time);
    ~unique_lock();

    unique_lock(const unique_lock&) = delete;
    unique_lock& operator=(const unique_lock&) = delete;

    unique_lock(unique_lock&& u) noexcept;
    unique_lock& operator=(unique_lock&& u);

    // bloqueo
    void lock();
    bool try_lock();

    template<class Rep, class Period>
      bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
    template<class Clock, class Duration>
      bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);

    void unlock();

    // modificadores
    void swap(unique_lock& u) noexcept;
    mutex_type* release() noexcept;

    // observadores
    bool owns_lock() const noexcept;
    explicit operator bool () const noexcept;
    mutex_type* mutex() const noexcept;

  private:
    mutex_type* pm;             // solo exposición
    bool owns;                  // solo exposición
  };

  template<class Mutex>
    void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y) noexcept;
}
}}

====Clase {{lc|std::once_flag}}====
{{source|1=
namespace std {
  struct once_flag {
    constexpr once_flag() noexcept;

    once_flag(const once_flag&) = delete;
    once_flag& operator=(const once_flag&) = delete;
  };
}
}}

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