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atomic_exchange, atomic_exchange_explicit

De cppreference.com
< c‎ | atomic

 
 
Atomique opérations de la bibliothèque
Types
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Types
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memory_order
atomic_flag
Macros
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Macros
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ATOMIC_***_LOCK_FREE
ATOMIC_FLAG_INIT
ATOMIC_VAR_INIT
kill_dependency
Fonctions
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Functions
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atomic_flag_test_and_set
atomic_flag_clear
atomic_init
atomic_is_lock_free
atomic_store
atomic_load
atomic_exchange
atomic_compare_exchange
atomic_fetch_add
atomic_fetch_sub
atomic_fetch_or
atomic_fetch_xor
atomic_fetch_and
atomic_thread_fence
atomic_signal_fence
 
Defined in header <stdatomic.h>
C atomic_exchange( volatile A* obj, C desired );
(1)
C atomic_exchange_explicit( volatile A* obj, C desired, memory_order order );
(2)
Remplace atomiquement la valeur pointée par obj avec desired et renvoie la valeur obj occupait précédemment. L'opération est de lecture-modification-écriture. La première version de la mémoire accède à savoir selon la memory_order_seq_cst, la deuxième version de mémoire accède à savoir selon la order .
Original:
Atomically replaces the value pointed by obj with desired and returns the value obj held previously. The operation is read-modify-write operation. The first version orders memory accesses according to memory_order_seq_cst, the second version orders memory accesses according to order.
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Il s'agit d'une fonction générique définis pour tous les types d'objets atomiques. A est le type d'un objet atomique, C est du type non-atomique correspondant à A .
Original:
This is a fonction générique defined for all atomic object types. A is the type of an atomic object, C is the non-atomic type corresponding to A.
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[modifier] Paramètres

obj -
pointeur vers l'objet à modifier atomique
Original:
pointer to the atomic object to modify
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desired -
la valeur de remplacement de l'objet atomique avec
Original:
the value to replace the atomic object with
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order -
la synchronisation de mémoire de commande pour cette opération: toutes les valeurs sont autorisées
Original:
the memory synchronization ordering for this operation: all values are permitted
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[modifier] Retourne la valeur

La valeur détenait auparavant l'objet atomique pointée par obj .
Original:
The value held previously be the atomic object pointed to by obj.
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[modifier] Voir aussi

swaps d'une valeur à l'objet d'une atomique si l'ancienne valeur est ce qui est attendu, lit autrement l'ancienne valeur
Original:
swaps a value with the an atomic object if the old value is what is expected, otherwise reads the old value
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(fonction) [edit]
C++ documentation for atomic_exchange, atomic_exchange_explicit