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std::declare_reachable

Da cppreference.com.
< cpp‎ | memory

 
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
Gestione della memoria dinamica
Basso livello di gestione della memoria
Allocatori
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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 inizializzata stoccaggio
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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
Puntatori intelligenti
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Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(deprecato)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
Garbage collection supporto
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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)
Varie
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C Library
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C Library
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Defined in header <memory>
void declare_reachable( void* p )
(dal C++11)
Dichiara l'oggetto a cui fa riferimento il puntatore p raggiungibile. Raggiungibile oggetti non verranno eliminati dal garbage collector o considerato come una perdita da un rilevatore di perdite, anche se tutti i puntatori ad esso vengono distrutti. Un oggetto può essere dichiarato raggiungibili più volte, in questo caso più chiamate a std::undeclare_reachable sarebbero necessari per rimuovere questa proprietà. Ad esempio, un XOR lista concatenata deve dichiarare le sue nodi raggiungibile se l'applicazione dispone di garbage collection abilitata.
Original:
Declares the object referenced by the pointer p reachable. Reachable objects will not be deleted by the garbage collector or considered to be a leak by a leak detector even if all pointers to it are destroyed. An object may be declared reachable multiple times, in which case multiple calls to std::undeclare_reachable would be needed to remove this property. For example, a XOR lista concatenata needs to declare its nodes reachable if the implementation has garbage collection enabled.
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Indice

[modifica] Parametri

p -
un puntatore in modo sicuro, derivato o un puntatore nullo
Original:
a safely-derived pointer or a null pointer
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Eccezioni

Può lanciare std::bad_alloc se il sistema non è in grado di allocare la memoria necessaria per seguire gli oggetti raggiungibili.
Original:
May throw std::bad_alloc if the system cannot allocate memory required to track reachable objects.
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[modifica] Esempio

[modifica] Vedi anche

dichiara che un oggetto può essere riciclato
Original:
declares that an object can be recycled
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(funzione di modello) [edit]