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std::shared_ptr::reset

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< cpp‎ | memory‎ | shared ptr

 
 
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
Original:
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
Original:
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
Original:
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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std::shared_ptr
Membri funzioni
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Member functions
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shared_ptr::shared_ptr
shared_ptr::~shared_ptr
shared_ptr::operator=
Modificatori
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Modifiers
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shared_ptr::reset
shared_ptr::swap
Osservatori
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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
Non membri funzioni
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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
atomic_load_explicit
atomic_store
atomic_store_explicit
atomic_exchange
atomic_exchange_explicit
atomic_compare_exchange_weak
atomic_compare_exchange_strong
atomic_compare_exchange_weak_explicit
atomic_compare_exchange_strong_explicit
std::hash
 
void reset();
(1) (dal C++11)
template< class Y >
void reset( Y* ptr );
(2) (dal C++11)
template< class Y, class Deleter >
void reset( Y* ptr, Deleter d );
(3) (dal C++11)
template< class Y, class Deleter, class Alloc >
void reset( Y* ptr, Deleter d, Alloc alloc );
(4) (dal C++11)
Sostituisce l'oggetto gestito con un oggetto puntato da ptr. Opzionale deleter d possono essere forniti, che viene poi usato per distruggere il nuovo oggetto quando nessun oggetto shared_ptr lo possiede. Per impostazione predefinita, l'espressione è usata come delete deleter. delete espressione corretta corrispondente al tipo fornito è sempre selezionata, questo è il motivo per cui è implementata la funzione come template usando un parametro separato Y.
Original:
Replaces the managed object with an object pointed to by ptr. Optional deleter d can be supplied, which is later used to destroy the new object when no shared_ptr objects own it. By default, delete expression is used as deleter. Proper delete expression corresponding to the supplied type is always selected, this is the reason why the function is implemented as template using a separate parameter Y.
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Se *this già possiede un oggetto ed è l'ultimo shared_ptr possederlo, l'oggetto viene distrutto attraverso la proprietà deleter.
Original:
If *this already owns an object and it is the last shared_ptr owning it, the object is destroyed through the owned deleter.
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Se l'oggetto puntato da ptr è già di proprietà, i risultati della funzione in un comportamento indefinito.
Original:
If the object pointed to by ptr is already owned, the function results in undefined behavior.
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1)
Rilascia la proprietà dell'oggetto gestito, se presente. Dopo la chiamata, *this gestisce nessun oggetto.
Original:
Releases the ownership of the managed object, if any. After the call, *this manages no object.
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2-4)
Sostituisce l'oggetto gestito con un oggetto puntato da ptr. Y deve essere di tipo completo e convertibile in modo implicito T. Inoltre:
Original:
Replaces the managed object with an object pointed to by ptr. Y must be a complete type and implicitly convertible to T. Additionally:
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2)
Utilizza l'espressione di eliminazione come il deleter. Un'espressione di cancellazione valida deve essere disponibile, delete ptr cioè devono essere ben formati, hanno un comportamento ben definito e non generare alcuna eccezione. Chiama efficacemente shared_ptr<T>(ptr).swap(*this);.
Original:
Uses the delete expression as the deleter. A valid delete expression must be available, i.e. delete ptr must be well formed, have well-defined behavior and not throw any exceptions. Effectively calls shared_ptr<T>(ptr).swap(*this);.
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3)
Utilizza la d specificato deleter come deleter. Deleter deve essere richiamabile per il tipo di T, cioè d(ptr) devono essere ben formati, hanno un comportamento ben definito e non generare alcuna eccezione. Deleter CopyConstructible deve essere. Chiama efficacemente shared_ptr<T>(ptr, d).swap(*this);.
Original:
Uses the specified deleter d as the deleter. Deleter must be callable for the type T, i.e. d(ptr) must be well formed, have well-defined behavior and not throw any exceptions. Deleter must be CopyConstructible. Effectively calls shared_ptr<T>(ptr, d).swap(*this);.
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4)
Stessa (3), ma utilizza inoltre una copia di alloc per l'assegnazione dei dati per uso interno. Alloc deve essere un Allocator. Il costruttore di copia e distruttore non devono generare eccezioni. Chiama efficacemente shared_ptr<T>(ptr, d, alloc).swap(*this);.
Original:
Same as (3), but additionally uses a copy of alloc for allocation of data for internal use. Alloc must be a Allocator. The copy constructor and destructor must not throw exceptions. Effectively calls shared_ptr<T>(ptr, d, alloc).swap(*this);.
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Indice

[modifica] Parametri

ptr -
puntatore ad un oggetto di acquisire la proprietà di
Original:
pointer to an object to acquire ownership of
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d -
deleter per memorizzare per l'eliminazione dell'oggetto
Original:
deleter to store for deletion of the object
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alloc -
allocatore da utilizzare per l'assegnazione interna
Original:
allocator to use for internal allocations
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[modifica] Valore di ritorno

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

1)
noexcept specification:  
noexcept
  (dal C++11)
2-4)
Come specificato dal costruttore in questione .
Original:
As specified by the relevant constructor .
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[modifica] Esempio

[modifica] Vedi anche

constructs new shared_ptr
(membro pubblico funzione) [edit]