std::atomic_thread_fence

 

C++

Sprache

Concepts

Utilities-Bibliothek

Strings Bibliothek

Container-Bibliothek

Algorithmen-Bibliothek

Iteratoren Bibliothek

Numerik-Bibliothek

Input / Output-Bibliothek

Lokalisierungen Bibliothek

Reguläre Ausdrücke Bibliothek(C++11)

Atomare Operationen Bibliothek(C++11)

Thread Support-Bibliothek(C++11)

 

Atomare Operationen Bibliothek

Types Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

atomic (C++11)

atomic_is_lock_free (C++11)

Funktionen Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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)

Atomic Fahnen Original: Atomic flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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)

Initialisierung Original: Initialization The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

atomic_init (C++11)

ATOMIC_VAR_INIT (C++11)

ATOMIC_FLAG_INIT (C++11)

Speicher Bestellung Original: Memory ordering The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

memory_order (C++11)

kill_dependency (C++11)

atomic_thread_fence (C++11)

atomic_signal_fence (C++11)

 

definiert in Header <atomic>
extern"C"void atomic_thread_fence(std::memory_order order );		(seit C++11)

Stellt Speicher Synchronisierung Bestellung von nicht-atomare und entspannt atomare Zugriffe, wie order angewiesen, ohne einen zugehörigen atomaren Operation. Zum Beispiel werden alle nicht-atomare und entspannt atomaren Läden, die vor einem std::memory_order_release Zaun in thread geschehen A wird mit nicht-atomare und entspannt atomaren Lasten aus den gleichen Stellen in thread B nach einer std::memory_order_acquire Zaun gemacht synchronisiert werden .

Original:

Establishes memory synchronization ordering of non-atomic and relaxed atomic accesses, as instructed by order, without an associated atomic operation. For example, all non-atomic and relaxed atomic stores that happen before a std::memory_order_release fence in thread A will be synchronized with non-atomic and relaxed atomic loads from the same locations made in thread B after an std::memory_order_acquire fence.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parameter

order

-

der Speicher Bestellung per diesem Zaun ausgeführt Original: the memory ordering executed by this fence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

(None)

Original:

(none)

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Ausnahmen

noexcept specification:  

noexcept

  (seit C++11)

Beispiele

Scan an array of mailboxes, and process only the ones intended for us, without unnecessary synchronization.

constint num_mailboxes =32;std::atomic<int> mailbox[num_mailboxes];   // The writer threads update non-atomic shared data and then update mailbox[i] as followsstd::atomic_store_explicit(&mailbox[i], std::memory_order_release);   // Reader thread needs to check all mailbox[i], but only needs to sync with onefor(int i =0; i < num_mailboxes;++i){if(std::atomic_load_explicit(&mailbox[i], std::memory_order_relaxed)== my_id){ std::atomic_thread_fence(std::memory_order_acquire);// synchronize with just one writer do_work(i);// guaranteed to observe everything done in the writer thread before// the atomic_store_explicit()}}

Siehe auch

memory_order (C++11)	definiert Speicher Bestellung Einschränkungen für den angegebenen atomaren Operation Original: defines memory ordering constraints for the given atomic operation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (typedef)
atomic_signal_fence (C++11)	Barriere zwischen einem Thread und einem Signalhandler, der im selben Thread ausgeführt wird Original: fence between a thread and a signal handler executed in the same thread The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion)
C documentation for atomic_thread_fence