Espaços nominais
Variantes
Acções

ATOMIC_VAR_INIT

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< cpp‎ | atomic

 
 
Biblioteca operações atômica
Tipos
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Types
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atomic(C++11)
atomic_is_lock_free(C++11)
Funções
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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)
Bandeiras atômicas
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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)
Inicialização
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Initialization
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atomic_init(C++11)
ATOMIC_VAR_INIT(C++11)
ATOMIC_FLAG_INIT(C++11)
Memória de encomenda
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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>
#define ATOMIC_VAR_INIT(value) /* implementation-defined */
Expande a expressão que pode ser usado para inicializar um objeto std::atomic que pode ser inicializado a partir value. Se o objeto atômico tem duração de armazenagem estática, essa inicialização é inicialização constante.
Original:
Expands the an expression which can be used to initialize an std::atomic object that can be initialized from value. If the atomic object has static storage duration, this initialization is inicialização constante.
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[editar] Notas

Acessando a variável durante a inicialização de outro segmento, mesmo através de uma operação atômica, é uma corrida de dados (que pode acontecer se o endereço é imediatamente passado para outro segmento com uma operação std::memory_order_relaxed)
Original:
Accessing the variable during initialization from another thread, even through an atomic operation, is a data race (it may happen if the address is immediately passed to another thread with a std::memory_order_relaxed operation)
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Esta macro é principalmente fornecida para compatibilidade com C, mas comporta o mesmo que o construtor de std::atomic.
Original:
This macro is primarily provided for compatibility with C; it behaves the same as the constructor of std::atomic.
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[editar] Exemplo

[editar] Veja também

non-atomic initialization of a default-constructed atomic object
(modelo de função) [edit]
constrói um objeto atômico
Original:
constructs an atomic object
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(of std::atomic função pública membro) [edit]