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      std::atomic::exchange

      De cppreference.com

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      <metanoindex/>

       
      C++
       
      Biblioteca operações atômica
      Tipos
      Original:
      Types
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      (C++11)
      (C++11)
      Funções
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      Functions
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      (C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)(C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      Bandeiras atômicas
      Original:
      Atomic flags
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      (C++11)
      (C++11)(C++11)
      (C++11)(C++11)
      Inicialização
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      Initialization
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      (C++11)
      (C++11)
      (C++11)
      Memória de encomenda
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      Memory ordering
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
       
      std::atomic
      Funções de membro
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      Member functions
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      atomic::atomic
      atomic::operator=
      atomic::is_lock_free
      atomic::store
      atomic::load
      atomic::operator T
      atomic::exchange
      atomic::compare_exchange
      Membro funções especializadas
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      Specialized member functions
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      atomic::fetch_add
      atomic::fetch_sub
      atomic::fetch_and
      atomic::fetch_or
      atomic::fetch_xor
      atomic::operator++
      atomic::operator++(int)
      atomic::operator--
      atomic::operator--(int)
      atomic::operator+=
      atomic::operator-=
      atomic::operator&=
      atomic::operator|=
      atomic::operator^=
       
      <tbody> </tbody>
      T exchange( T desired, memory_order = std::memory_order_seq_cst );
      		 (desde C++11)
      T exchange( T desired, memory_order = std::memory_order_seq_cst ) volatile;
      		 (desde C++11)
      Atomicamente substitui o valor subjacente com desired. A operação é ler-modificar-escrever a operação. A memória é afectada de acordo com o valor de memory_order.
      Original:
      Atomically replaces the underlying value with desired. The operation is read-modify-write operation. Memory is affected according to the value of memory_order.
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      Parâmetros

      desired -
      valor a atribuir
      Original:
      value to assign
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      memory_order -
      restrições de ordem memória de aplicar
      Original:
      memory order constraints to enforce
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      Valor de retorno

      O valor da variável atómica antes da chamada.
      Original:
      The value of the atomic variable before the call.
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      Exceções

      noexcept specification:  
      <tbody> </tbody>
      noexcept
        (desde C++11)

      Veja também

      (C++11)
      (C++11)
      atomicamente substitui o valor do objeto atômico com não atômica argumento e retorna o valor antigo do atômica
      Original:
      atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic
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      (modelo de função) [edit]