Varianti

    std::atomic_flag_clear, std::atomic_flag_clear_explicit

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    <metanoindex/>

     
    C++
     
    Atomic operazioni di biblioteca
    Tipi
    Original:
    Types
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    atomic(C++11)
    atomic_is_lock_free(C++11)
    Funzioni
    Original:
    Functions
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    atomic_store
    atomic_store_explicit    		(C++11)
    (C++11)
    atomic_load
    atomic_load_explicit    		(C++11)
    (C++11)
    atomic_exchange
    atomic_exchange_explicit    		(C++11)
    (C++11)
    atomic_compare_exchange_weak
    atomic_compare_exchange_weak_explicit
    atomic_compare_exchange_strong
    atomic_compare_exchange_strong_explicit    		(C++11)
    (C++11)
    (C++11)
    (C++11)
    atomic_fetch_add
    atomic_fetch_add_explicit    		(C++11)
    (C++11)
    atomic_fetch_sub
    atomic_fetch_sub_explicit    		(C++11)
    (C++11)
    atomic_fetch_and
    atomic_fetch_and_explicit    		(C++11)
    (C++11)
    atomic_fetch_or
    atomic_fetch_or_explicit    		(C++11)
    (C++11)
    atomic_fetch_xor
    atomic_fetch_xor_explicit    		(C++11)
    (C++11)
    Bandiere Atomic
    Original:
    Atomic flags
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    atomic_flag(C++11)
    atomic_flag_test_and_set
    atomic_flag_test_and_set_explicit    		(C++11)
    (C++11)
    atomic_flag_clear
    atomic_flag_clear_explicit    		(C++11)
    (C++11)
    Inizializzazione
    Original:
    Initialization
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    atomic_init(C++11)
    ATOMIC_VAR_INIT(C++11)
    ATOMIC_FLAG_INIT(C++11)
    Memoria di ordinazione
    Original:
    Memory ordering
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    memory_order(C++11)
    kill_dependency(C++11)
    atomic_thread_fence(C++11)
    atomic_signal_fence(C++11)
     
    <tbody> </tbody>
    Elemento definito nell'header <atomic>
    void atomic_flag_clear( volatile std::atomic_flag* p );
    		 (1) (dal C++11)
    void atomic_flag_clear( std::atomic_flag* p );
    		 (2) (dal C++11)
    void atomic_flag_clear_explicit( volatile std::atomic_flag* p, std::memory_order order )
    		 (3) (dal C++11)
    void atomic_flag_clear_explicit( std::atomic_flag* p, std::memory_order order )
    		 (4) (dal C++11)

    Atomically changes the state of a std::atomic_flag pointed to by p to clear (false).

    Parametri

    p -
    puntatore a std::atomic_flag per accedere
    Original:
    pointer to std::atomic_flag to access
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    order - the memory sycnhronization ordering for this operation: only std::memory_order_relaxed, std::memory_order_consume, std::memory_order_acquire, or std::memory_order_seq_cst are permitted.

    Valore di ritorno

    nessuno.
    Original:
    none.
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    Eccezioni

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

    Possibile implementazione

    First version 
    void atomic_flag_clear(volatile std::atomic_flag* p) 
{
    p->clear();
}
    Second version 
    void atomic_flag_clear(std::atomic_flag* p) 
{
    p->clear();
}
    Third version 
    void atomic_flag_clear_explicit(volatile std::atomic_flag* p, 
                                std::memory_order order) 
{
    p->clear(order);
}
    Fourth version 
    void atomic_flag_clear_explicit(std::atomic_flag* p, 
                                std::memory_order order) 
{
    p->clear(order);
}

    Vedi anche

    (C++11)
    il blocco privo di tipo booleano atomica
    Original:
    the lock-free boolean atomic type
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    (classe) [modifica]
    (C++11)
    (C++11)
    imposta atomicamente il flag su true e restituisce il suo valore precedente
    Original:
    atomically sets the flag to true and returns its previous value
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    (funzione) [modifica]
    (C++11)
    definisce i limiti di memoria di ordinazione per il data operazione atomica
    Original:
    defines memory ordering constraints for the given atomic operation
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    (typedef) [modifica]
    C documentation for atomic_flag_clear, atomic_flag_clear_explicit