std::set_new_handler

 

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rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

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Los asignadores Original: Allocators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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operator new operator new[]

operator delete operator delete[]

get_new_handler (C++11)

set_new_handler

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bad_alloc

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new_handler

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nothrow

 

Defined in header <new>
std::new_handler set_new_handler(std::new_handler new_p)

Hace new_p el nuevo mundial nuevo controlador de función y devuelve el previamente instalada del controlador de nuevo .

Original:

Makes new_p the new global new-handler function and returns the previously installed new-handler.

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Notas

El nuevo del controlador de función es la función llamada por <div class="t-tr-text">funciones de asignación

Original:

allocation functions

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cada vez que un intento de asignación de memoria falla. Su propósito es una de tres cosas:

Original:

The new-handler function is the function called by

funciones de asignación

Original:

allocation functions

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</div> whenever a memory allocation attempt fails. Its intended purpose is one of three things:

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1)

disponer de más memoria

Original:

make more memory available

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2)

terminar el programa (por ejemplo, mediante std::terminate llamada)

Original:

terminate the program (e.g. by calling std::terminate)

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3)

lanzar una excepción de tipo std::bad_alloc o derivados de std::bad_alloc

Original:

throw exception of type std::bad_alloc or derived from std::bad_alloc

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Si nueva manejador de devoluciones, la función de asignación repite el intento de asignación previamente fallado y llama al nuevo manejador de nuevo si vuelve a fallar la asignación. Para finalizar el ciclo, nuevo del controlador puede llamar std::set_new_handler(nullptr): si, después de un intento fallido de asignación, la función de asignación determina que std::get_new_handler devuelve un valor de puntero nulo, std::bad_alloc tirar .

Original:

If new-handler returns, the allocation function repeats the previously-failed allocation attempt and calls the new-handler again if the allocation fails again. To end the loop, new-handler may call std::set_new_handler(nullptr): if, after a failed allocation attempt, allocation function finds that std::get_new_handler returns a null pointer value, it will throw std::bad_alloc.

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Al inicio del programa, nuevo del controlador es un puntero nulo .

Original:

At program startup, new-handler is a null pointer.

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Parámetros

new_p

-

puntero a la función de std::new_handler tipo, o un puntero nulo Original: pointer to function of type std::new_handler, or null pointer The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

El controlador instalado previamente nuevo, o un valor de puntero nulo si no se ha instalado .

Original:

The previously-installed new handler, or a null pointer value if none was installed.

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Excepciones

noexcept specification:  

noexcept

  (ya que C + +11)

Ejemplo

#include <iostream>
#include <new>
void handler()
{
    std::cout << "Memory allocation failed, terminating\n";
    std::set_new_handler(nullptr);
}
int main()
{
    std::set_new_handler(handler);
    try {
        while(true)
            new int[100000000ul];
    }catch(const std::bad_alloc& e) {
        std::cout << e.what() << '\n';
    }
}

Output:

Memory allocation failed, terminating
std::bad_alloc

Ver también

operator new operator new[]	funciones de asignación Original: allocation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
set_new_handler	registra un controlador nuevo Original: registers a new handler The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
new_handler	función de tipo puntero del nuevo controlador Original: function pointer type of the new handler The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (typedef)
bad_alloc	Excepción que se produce cuando la asignación de memoria falla Original: exception thrown when memory allocation fails The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase)