Namespace
Varianti

std::atomic_fetch_and, std::atomic_fetch_and_explicit

Da cppreference.com.
< cpp‎ | atomic

 
 
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)
 
Defined in header <atomic>
template< class Integral >
Integral atomic_fetch_and( std::atomic<Integral>* obj, Integral arg );
(1) (dal C++11)
template< class Integral >
Integral atomic_fetch_and( volatile std::atomic<Integral>* obj, Integral arg );
(2) (dal C++11)
template< class Integral >

Integral atomic_fetch_and_explicit( std::atomic<Integral>* obj, Integral arg,

                                    std::memory_order order);
(3) (dal C++11)
template< class Integral >

Integral atomic_fetch_and_explicit( volatile std::atomic<Integral>* obj, Integral arg,

                                    std::memory_order order);
(4) (dal C++11)
1-2)
Sostituisce atomico il valore puntato dal arg con il risultato di AND bit per bit tra il valore storico di obj e arg, e restituisce il valore obj precedentemente detenuta, come per obj->fetch_and(arg)
Original:
Atomically replaces the value pointed by arg with the result of bitwise AND between the old value of obj and arg, and returns the value obj held previously, as if by obj->fetch_and(arg)
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3-4)
Sostituisce atomico il valore puntato dal arg con il risultato di AND bit per bit tra il valore storico di obj e arg, e restituisce il valore obj precedentemente detenuta, come per obj->fetch_and(arg, order)
Original:
Atomically replaces the value pointed by arg with the result of bitwise AND between the old value of obj and arg, and returns the value obj held previously, as if by obj->fetch_and(arg, order)
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Indice

[modifica] Parametri

obj -
puntatore all'oggetto atomica da modificare
Original:
pointer to the atomic object to modify
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arg -
il valore di bit AND al valore memorizzato nell'oggetto atomica
Original:
the value to bitwise AND to the value stored in the atomic object
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order -
la sincronizzazione della memoria di ordinazione per questa operazione: tutti i valori sono consentiti .
Original:
the memory synchronization ordering for this operation: all values are permitted.
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[modifica] Valore di ritorno

Il valore contenuto in precedenza dall'oggetto atomico puntato da obj
Original:
The value held previously by the atomic object pointed to by obj
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Possibile implementazione

template< class T >
typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, bool>::value, T>::type
    atomic_fetch_and(std::atomic<T>* obj, T arg);
{
    return obj->fetch_and(arg);
}

[modifica] Esempio

[modifica] Vedi anche

(C++11)
esegue atomicamente AND bit a bit tra l'argomento e il valore dell'oggetto atomico e ottiene il valore contenuto precedentemente
Original:
atomically performs bitwise AND between the argument and the value of the atomic object and obtains the value held previously
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(membro pubblico of std::atomic funzione) [edit]
sostituisce l'oggetto atomico con il risultato di OR logico con un non-atomico argomento e ottiene il valore precedente della atomico
Original:
replaces the atomic object with the result of logical OR with a non-atomic argument and obtains the previous value of the atomic
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(funzione di modello) [edit]
sostituisce l'oggetto atomico con il risultato di logica XOR con un non-atomico argomento e ottiene il valore precedente della atomico
Original:
replaces the atomic object with the result of logical XOR with a non-atomic argument and obtains the previous value of the atomic
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(funzione di modello) [edit]
C documentation for atomic_fetch_and, atomic_fetch_and_explicit