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std::atomic::operator+=,-=,&=,|=,^=

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 operator+=( T arg );
T operator+=( T arg ) volatile;
(1) (unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
T* operator+=( std::ptrdiff_t arg );
T* operator+=( std::ptrdiff_t arg ) volatile;
(1) (unico membro del modello di specializzazione atomic<T*>)
(dal C++11)
T operator-=( T arg );
T operator-=( T arg ) volatile;
(2) (unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
T* operator-=( std::ptrdiff_t arg );
T* operator-=( std::ptrdiff_t arg ) volatile;
(2) (unico membro del modello di specializzazione atomic<T*>)
(dal C++11)
T operator&=( T arg );
T operator&=( T arg ) volatile;
(3) (unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
T operator|=( T arg );
T operator|=( T arg ) volatile;
(4) (unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
T operator^=( T arg );
T operator^=( T arg ) volatile;
(5) (unico membro del modello di specializzazione atomic<Integral>)
(dal C++11)
Atomicamente sostituisce il valore corrente con il risultato di computazione coinvolge il valore precedente e arg. L'operazione è lettura-modifica-scrittura.
Original:
Atomically replaces the current value with the result of computation involving the previous value and arg. The operation is read-modify-write operation.
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1)
Esegue inoltre atomica. Equivalente a fetch_add(arg).
Original:
Performs atomic addition. Equivalent to fetch_add(arg).
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2)
Esegue atomica sottrazione. Equivalente a fetch_sub(arg).
Original:
Performs atomic subtraction. Equivalent to fetch_sub(arg).
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3)
Esegue atomica e bit per bit. Equivalente a fetch_and(arg).
Original:
Performs atomic bitwise and. Equivalent to fetch_and(arg).
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4)
Esegue atomico o bit per bit. Equivalente a fetch_or(arg).
Original:
Performs atomic bitwise or. Equivalent to fetch_or(arg).
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5)
Esegue atomico bit per bit esclusivo o. Equivalente a fetch_xor(arg).
Original:
Performs atomic bitwise exclusive or. Equivalent to fetch_xor(arg).
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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'argomento per l'operazione aritmetica
Original:
the argument for the arithmetic operation
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[modifica] Valore di ritorno

Il valore risultante.
Original:
The resulting value.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Vedi anche

incrementa o decrementa il valore atomico di uno
Original:
increments or decrements the atomic value by one
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(membro pubblico funzione) [edit]