std::thread::thread
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| thread(); |
(1) | (ya que C + +11) |
| thread( thread&& other ); |
(2) | (ya que C + +11) |
| template< class Function, class... Args > explicit thread( Function&& f, Args&&... args ); |
(3) | (ya que C + +11) |
| thread(const thread&) = delete; |
(4) | (ya que C + +11) |
Construye objeto nuevo hilo .
Original:
Constructs new thread object.
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1)
Crea un objeto nuevo hilo que no representa un hilo .
Original:
Creates new thread object which does not represent a thread.
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2)
Mueva constructor. Construye el objeto de subproceso para representar el hilo de ejecución que estuvo representada por
other. Después de esta llamada other ya no representa un hilo de ejecución .Original:
Move constructor. Constructs the thread object to represent the thread of execution that was represented by
other. After this call other no longer represents a thread of execution.The text has been machine-translated via Google Translate.
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3)
Crea un nuevo objeto
std::thread y la asocia con un hilo de ejecución. Primero, el constructor copia todos args... argumentos para almacenamiento local de subprocesos como por la función:Original:
Creates new
std::thread object and associates it with a thread of execution. First the constructor copies all arguments args... to thread-local storage as if by the function:The text has been machine-translated via Google Translate.
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template <class T> typename decay<T>::type decay_copy(T&& v) { return std::forward<T>(v); }
@ @ Las excepciones producidas durante la evaluación y la copia de los argumentos que se lanzan en el hilo actual, no el nuevo hilo .
Original:
@@ Any exceptions thrown during evaluation and copying of the arguments are thrown in the current thread, not the new thread.
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@ @ El código que se ejecutará en el nuevo hilo se define de la siguiente manera. Vamos a referirnos a None
copied_args como t1, t2, ..., tN, donde N es sizeof...(copied_args)and
copied_args is the result of calling decay_copy as defined above. The following code will be run in the new thread:
- Si
fes un puntero a una función miembro deTclase, entonces se le llama. El valor de retorno es ignorado. Efectivamente, el código se ejecuta la siguiente:Original:Iffis pointer to a member function of classT, then it is called. The return value is ignored. Effectively, the following code is executed:The text has been machine-translated via Google Translate.
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- (t1.*f)(t2, ..., tN) si el tipo de
t1es o bienT, la referencia aTo referencia a tipo derivado deT.Original:(t1.*f)(t2, ..., tN) if the type oft1is eitherT, reference toTor reference to type derived fromT.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - ((*t1).*f)(t2, ..., tN) de otra manera .Original:((*t1).*f)(t2, ..., tN) otherwise.The text has been machine-translated via Google Translate.
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-
- Si N == 1 y
fes puntero a un objeto de miembro de datos de una clase, a continuación, se accede a ella. El valor del objeto se ignora. Efectivamente, el código se ejecuta la siguiente:Original:If N == 1 andfis pointer to a member data object of a class, then it is accessed. The value of the object is ignored. Effectively, the following code is executed:The text has been machine-translated via Google Translate.
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- t1.*f si y el tipo de
t1es o bienT, la referencia aTo referencia a tipo derivado deT.Original:t1.*f if and the type oft1is eitherT, reference toTor reference to type derived fromT.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - (*t1).*f de otra manera .Original:(*t1).*f otherwise.The text has been machine-translated via Google Translate.
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-
-
fse llama como un puntero a una función no miembro en los demás casos. El valor de retorno es ignorado. Efectivamente, f(t1, t2, ..., tN) se ejecuta .Original:fis called as a pointer to a non-member function in all other cases. The return value is ignored. Effectively, f(t1, t2, ..., tN) is executed.The text has been machine-translated via Google Translate.
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Original:
@@ The code that will be run in the new thread is defined as follows. Vamos a referirnos a None
copied_args como t1, t2, ..., tN, donde N es sizeof...(copied_args)and
copied_args is the result of calling decay_copy as defined above. The following code will be run in the new thread:
- Si
fes un puntero a una función miembro deTclase, entonces se le llama. El valor de retorno es ignorado. Efectivamente, el código se ejecuta la siguiente:Original:Iffis pointer to a member function of classT, then it is called. The return value is ignored. Effectively, the following code is executed:The text has been machine-translated via Google Translate.
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- (t1.*f)(t2, ..., tN) si el tipo de
t1es o bienT, la referencia aTo referencia a tipo derivado deT.Original:(t1.*f)(t2, ..., tN) if the type oft1is eitherT, reference toTor reference to type derived fromT.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - ((*t1).*f)(t2, ..., tN) de otra manera .Original:((*t1).*f)(t2, ..., tN) otherwise.The text has been machine-translated via Google Translate.
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-
- Si N == 1 y
fes puntero a un objeto de miembro de datos de una clase, a continuación, se accede a ella. El valor del objeto se ignora. Efectivamente, el código se ejecuta la siguiente:Original:If N == 1 andfis pointer to a member data object of a class, then it is accessed. The value of the object is ignored. Effectively, the following code is executed:The text has been machine-translated via Google Translate.
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- t1.*f si y el tipo de
t1es o bienT, la referencia aTo referencia a tipo derivado deT.Original:t1.*f if and the type oft1is eitherT, reference toTor reference to type derived fromT.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - (*t1).*f de otra manera .Original:(*t1).*f otherwise.The text has been machine-translated via Google Translate.
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-
-
fse llama como un puntero a una función no miembro en los demás casos. El valor de retorno es ignorado. Efectivamente, f(t1, t2, ..., tN) se ejecuta .Original:fis called as a pointer to a non-member function in all other cases. The return value is ignored. Effectively, f(t1, t2, ..., tN) is executed.The text has been machine-translated via Google Translate.
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The text has been machine-translated via Google Translate.
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4)
El constructor de copia se suprime hilos no son copiables. No hay dos
std::thread objetos pueden representar el mismo hilo de ejecución .Original:
The copy constructor is deleted; threads are not copyable. No two
std::thread objects may represent the same thread of execution.The text has been machine-translated via Google Translate.
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Contenido |
[editar] Parámetros
| other | - | otro objeto hilo para construir este objeto con hilo
Original: another thread object to construct this thread object with The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| f | - | funcionar a ejecutar en el nuevo hilo
Original: function to execute in the new thread The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| args... | - | argumentos que se pasan a la nueva función
Original: arguments to pass to the new function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[editar] Excepciones
1-2)
3)
std::system_error si el hilo no se pudo iniciar. La excepción puede representar la
std::errc::resource_unavailable_try_again condición de error u otra condición de error específico de la implementación .Original:
std::system_error if the thread could not be started. The exception may represent the error condition
std::errc::resource_unavailable_try_again or another implementation-specific error condition.The text has been machine-translated via Google Translate.
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[editar] Notas
Los argumentos de la función del hilo se copian por valor. Si un argumento de referencia debe ser pasado a la función del hilo, tiene que ser envuelto (por ejemplo, con std::ref o std::cref) .
Original:
The arguments to the thread function are copied by value. If a reference argument needs to be passed to the thread function, it has to be wrapped (e.g. with std::ref or std::cref).
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Cualquier valor de retorno de la función es ignorada. Si la función lanza una excepción, std::terminate se llama. Para pasar valores de retorno o excepciones al subproceso de llamada, o std::promise std::async se puede usar .
Original:
Any return value from the function is ignored. If the function throws an exception, std::terminate is called. In order to pass return values or exceptions back to the calling thread, std::promise or std::async may be used.
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[editar] Ejemplo
#include <iostream> #include <utility> #include <thread> #include <chrono> #include <functional> #include <atomic> void f1(int n) { for(int i=0; i<5; ++i) { std::cout << "Thread " << n << " executing\n"; std::this_thread::sleep_for(std::chrono::milliseconds(10)); } } void f2(int& n) { for(int i=0; i<5; ++i) { std::cout << "Thread 2 executing\n"; ++n; std::this_thread::sleep_for(std::chrono::milliseconds(10)); } } int main() { int n = 0; std::thread t1; // t1 is not a thread std::thread t2(f1, n+1); // pass by value std::thread t3(f2, std::ref(n)); // pass by reference std::thread t4(std::move(t3)); // t4 is now running f2(). t3 is no longer a thread t2.join(); t4.join(); std::cout << "Final value of n is " << n << '\n'; }
Possible output:
Thread 1 executing Thread 2 executing Thread 1 executing Thread 2 executing Thread 1 executing Thread 2 executing Thread 1 executing Thread 2 executing Thread 1 executing Thread 2 executing Final value of n is 5