Namespace
Varianti

std::condition_variable

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C++
 
Discussione libreria di supporto
Threads
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Threads
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thread(C++11)
this_thread spazio dei nomi
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this_thread namespace
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get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
Mutua esclusione
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Blocco di gestione generico
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Generic lock management
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lock_guard(C++11)
unique_lock(C++11)
defer_lock_t
try_to_lock_t
adopt_lock_t		(C++11)
(C++11)
(C++11)
lock(C++11)
try_lock(C++11)
defer_lock
try_to_lock
adopt_lock		(C++11)
(C++11)
(C++11)
Condizioni variabili
Original:
Condition variables
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condition_variable(C++11)
condition_variable_any(C++11)
notify_all_at_thread_exit(C++11)
cv_status(C++11)
Futures
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Futures
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promise(C++11)
future(C++11)
shared_future(C++11)
packaged_task(C++11)
async(C++11)
launch(C++11)
future_status(C++11)
future_error(C++11)
future_category(C++11)
future_errc(C++11)
 
std::condition_variable
Membri funzioni
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Member functions
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condition_variable::condition_variable
condition_variable::~condition_variable
Notifica
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Notification
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condition_variable::notify_one
condition_variable::notify_all
In attesa
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Waiting
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condition_variable::wait
condition_variable::wait_for
condition_variable::wait_until
Maniglia nativo
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Native handle
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condition_variable::native handle
 
Elemento definito nell'header <condition_variable>
class condition_variable;
 (dal C++11)

La classe condition_variable è una primitiva di sincronizzazione che può essere utilizzata per bloccare un thread, o più thread contemporaneamente, fino a che:

  • viene ricevuta una notifica da un altro thread
  • scade un timeout
  • si verifica una wakeup spuria
Qualsiasi thread che intende aspettare std::condition_variable deve acquisire una std::unique_lock prima. Le operazioni di attesa atomicamente rilasciare il mutex e sospendere l'esecuzione del thread. Quando la variabile di condizione è notificato, il filo si risveglia, e il mutex viene riacquisito.
Original:
Any thread that intends to wait on std::condition_variable has to acquire a std::unique_lock first. The wait operations atomically release the mutex and suspend the execution of the thread. When the condition variable is notified, the thread is awakened, and the mutex is reacquired.
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La classe è un std::condition_variable StandardLayoutType. Non è CopyConstructible, MoveConstructible, CopyAssignable, MoveAssignable.
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The class std::condition_variable is a StandardLayoutType. It is not CopyConstructible, MoveConstructible, CopyAssignable, MoveAssignable.
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Indice

[modifica] Membri tipi

Membro tipo
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Member type
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 Definition
native_handle_type
Implementazione definita
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implementation-defined
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[modifica] Membri funzioni
Costruisce l'oggetto
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constructs the object
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(metodo pubblico) [modifica]
distrugge l'oggetto
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destructs the object
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(metodo pubblico) [modifica]
operator=
[cancellato]
non copia-assegnabile
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not copy-assignable
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(metodo pubblico) [modifica]
Notifica
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Notification
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segnala un thread in attesa
Original:
notifies one waiting thread
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