Namespace
Varianti

std::atomic::fetch_add

Da cppreference.com.
< cpp‎ | atomic‎ | 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)
 
std::atomic
Membri funzioni
Original:
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
Funzioni membro specializzati
Original:
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^=
 
T fetch_add( T arg,

             memory_order = std::memory_order_seq_cst );
T fetch_add( T arg,

             memory_order = std::memory_order_seq_cst ) volatile;
(unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
T* fetch_add( std::ptrdiff_t arg,

              memory_order = std::memory_order_seq_cst );
T* fetch_add( std::ptrdiff_t arg,

              memory_order = std::memory_order_seq_cst ) volatile;
(unico membro del modello di specializzazione atomic<T*>)
(dal C++11)
Atomicamente sostituisce il valore corrente con il risultato della somma aritmetica del valore e arg. L'operazione è lettura-modifica-scrittura. Memoria è influenzata in base al valore di memory_order.
Original:
Atomically replaces the current value with the result of arithmetic addition of the value and arg. The operation is read-modify-write operation. Memory is affected according to the value of memory_order.
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Per i tipi di Integral firmati, l'aritmetica è definito l'utilizzo di due rappresentazione in complemento. Ecco
Original:
For signed Integral types, arithmetic is defined to use two’s complement representation. There
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sono risultati non definiti. Per i tipi T*, il risultato può essere un indirizzo definito, ma le operazioni altrimenti non hanno un comportamento indefinito.
Original:
are no undefined results. For T* types, the result may be an undefined address, but the operations otherwise have no undefined behavior.
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Indice

[modifica] Parametri

arg -
l'altro argomento di somma aritmetica
Original:
the other argument of arithmetic addition
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memory_order -
vincoli di ordine di memoria da far rispettare
Original:
memory order constraints to enforce
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[modifica] Valore di ritorno

Il valore della variabile atomica prima della chiamata.
Original:
The value of the atomic variable before the call.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Vedi anche

aggiunge un non-atomico valore a un oggetto atomico e ottiene il valore precedente della atomico
Original:
adds a non-atomic value to an atomic object and obtains the previous value of the atomic
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(funzione di modello) [edit]