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std::allocate_shared

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< cpp‎ | memory‎ | shared ptr

 
 
 
La gestion dynamique de la mémoire
Faible niveau de gestion de la mémoire
Répartiteurs
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Allocators
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allocator
allocator_traits (C++11)
allocator_arg_t (C++11)
allocator_arg (C++11)
uses_allocator (C++11)
scoped_allocator_adaptor (C++11)
Non initialisée stockage
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Uninitialized storage
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uninitialized_copy
uninitialized_copy_n (C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
Pointeurs intelligents
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Smart pointers
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unique_ptr (C++11)
shared_ptr (C++11)
weak_ptr (C++11)
auto_ptr (obsolète)
owner_less (C++11)
enable_shared_from_this (C++11)
bad_weak_ptr (C++11)
default_delete (C++11)
Soutien garbage collection
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Garbage collection support
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declare_reachable (C++11)
undeclare_reachable (C++11)
declare_no_pointers (C++11)
undeclare_no_pointers (C++11)
pointer_safety (C++11)
get_pointer_safety (C++11)
Divers
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Miscellaneous
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pointer_traits (C++11)
addressof (C++11)
align (C++11)
Bibliothèque C
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C Library
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std::shared_ptr
Les fonctions membres
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Member functions
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shared_ptr::shared_ptr
shared_ptr::~shared_ptr
shared_ptr::operator=
Modificateurs
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Modifiers
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shared_ptr::reset
shared_ptr::swap
Des observateurs
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Observers
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shared_ptr::get
shared_ptr::operator*
shared_ptr::operator->
shared_ptr::use_count
shared_ptr::unique
shared_ptr::operator bool
shared_ptr::owner_before
Tiers fonctions
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Non-member functions
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std::swap
make_shared
allocate_shared
static_pointer_cast
dynamic_pointer_cast
const_pointer_cast
get_deleter
operator==
operator|=
operator<
operator<=
operator>
operator>=
operator<<
atomic_is_lock_free
atomic_load
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atomic_store_explicit
atomic_exchange
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atomic_compare_exchange_weak
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atomic_compare_exchange_weak_explicit
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std::hash
 
Defined in header <memory>
template< class T, class Alloc, class... Args >
shared_ptr<T> allocate_shared( const Alloc& alloc, Args... args );
Construit un objet de type de T et l'enveloppe dans un std::shared_ptr utilisant args que la liste des paramètres pour le constructeur de T .
Original:
Constructs an object of type T and wraps it in a std::shared_ptr using args as the parameter list for the constructor of T.
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Tout d'allocation de mémoire se fait en utilisant une copie de alloc, qui satisfait aux exigences Allocator .
Original:
All memory allocation is done using a copy of alloc, which satisfies the Allocator requirements.
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Sommaire

[modifier] Paramètres

alloc - The Allocator to use.
args... -
liste des arguments avec lesquels une instance de T seront construits .
Original:
list of arguments with which an instance of T will be constructed.
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[modifier] Retourne la valeur

std::shared_ptr d'une instance de T type .
Original:
std::shared_ptr of an instance of type T.
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[modifier] Exceptions

Peut lever les exceptions levées à partir de Alloc::allocate() ou du constructeur de T .
Original:
Can throw the exceptions thrown from Alloc::allocate() or from the constructor of T.
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[modifier] Notes

Cette fonction alloue de la mémoire pour l'objet T et pour le bloc de contrôle shared_ptr avec une allocation de mémoire unique. En revanche, la déclaration std::shared_ptr<T> p(new T(Args...)) effectue deux allocations de mémoire, ce qui peut induire une surcharge inutile .
Original:
This function allocates memory for the T object and for the shared_ptr's control block with a single memory allocation. In contrast, the declaration std::shared_ptr<T> p(new T(Args...)) performs two memory allocations, which may incur unnecessary overhead.
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Une copie de alloc est stocké en tant que partie du bloc de commande de sorte qu'il peut être utilisé pour libérer une fois le nombre de références à la fois partagées et remis à zéro faible .
Original:
A copy of alloc is stored as part of the control block so that it can be used to deallocate it once both shared and weak reference counts reach zero.
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[modifier] Voir aussi

Construit un nouveau shared_ptr
(fonction membre publique) [edit]
crée un pointeur partagé qui gère un nouvel objet
Original:
creates a shared pointer that manages a new object
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(fonction générique) [edit]