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std::allocate_shared

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< cpp‎ | memory‎ | shared ptr

 
 
Utilidades de la biblioteca
Escriba apoyo (basic types, RTTI, type traits)
Gestión de memoria dinámica
Gestión de errores
Programa de servicios públicos
Funciones variadic
Fecha y hora
Objetos Function
(C++11)
Operadores relacionales
Original:
Relational operators
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Pares y tuplas
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Pairs and tuples
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(C++11)
Cambiar, hacia adelante y mover
Original:
Swap, forward and move
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(C++11)
(C++11)
(C++11)
 
Gestión de memoria dinámica
Bajo la gestión de memoria de nivel
Los asignadores
Original:
Allocators
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Inicializar el almacenamiento
Original:
Uninitialized storage
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Punteros inteligentes
Original:
Smart pointers
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(C++11)
(C++11)
(C++11)
(obsoleto)
(C++11)
Garbage soporte colección
Original:
Garbage collection support
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Varios
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Miscellaneous
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(C++11)
(C++11)
C Library
Original:
C Library
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std::shared_ptr
Las funciones miembro
Original:
Member functions
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Modificadores
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Modifiers
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Los observadores
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Observers
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Terceros funciones
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Non-member functions
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allocate_shared
 
Definido en la cabecera <memory>
template< class T, class Alloc, class... Args >
shared_ptr<T> allocate_shared( const Alloc& alloc, Args... args );
Construye un objeto de tipo T y lo envuelve en una std::shared_ptr utilizando args como la lista de parámetros del constructor 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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Todos asignación de memoria se realiza utilizando una copia de alloc, que satisface los requisitos Allocator .
Original:
All memory allocation is done using a copy of alloc, which satisfies the Allocator requirements.
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Contenido

[editar] Parámetros

alloc - The Allocator to use.
args... -
lista de argumentos con los que va a ser una instancia de T construidos .
Original:
list of arguments with which an instance of T will be constructed.
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[editar] Valor de retorno

std::shared_ptr de una instancia de tipo T .
Original:
std::shared_ptr of an instance of type T.
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[editar] Excepciones

Puede tirar las excepciones lanzadas desde Alloc::allocate() o desde el constructor de T .
Original:
Can throw the exceptions thrown from Alloc::allocate() or from the constructor of T.
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[editar] Notas

Esta función asigna memoria para el objeto T y para el bloque de control de la shared_ptr con una asignación de memoria. En contraste, la declaración std::shared_ptr<T> p(new T(Args...)) realiza dos asignaciones de memoria, que puede incurrir en una sobrecarga innecesaria .
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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Una copia de alloc se almacena como parte del bloque de control de modo que se puede utilizar para desasignar una vez que los recuentos de referencia compartida y débil llegar a cero .
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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[editar] Ver también

constructs new shared_ptr
(función miembro público) [editar]
crea un puntero compartido que gestiona un nuevo objeto
Original:
creates a shared pointer that manages a new object
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(plantilla de función) [editar]