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std::packaged_task::operator()

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C++
 
Thema Support-Bibliothek
Threads
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Threads
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thread(C++11)
this_thread Namespace
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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)
Gegenseitigen Ausschluss
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Generische Sperrverwaltung
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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)
Zustand Variablen
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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::packaged_task
Member-Funktionen
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Member functions
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packaged_task::packaged_task
packaged_task::~packaged_task
packaged_task::operator=
packaged_task::valid
packaged_task::swap
Erste das Ergebnis
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Getting the result
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packaged_task::get_future
Execution
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Execution
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packaged_task::operator()
packaged_task::make_ready_at_thread_exit
packaged_task::reset
 
void operator()( ArgTypes... args );
 (seit C++11)

Calls the stored task with args as the arguments. The return value of the task or any exceptions thrown are stored in the shared state. The shared state is made ready and any threads waiting for this are unblocked.

Inhaltsverzeichnis

[Bearbeiten] Parameter

args -
die Parameter beim Aufruf der gespeicherten Aufgabe passieren
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the parameters to pass on invocation of the stored task
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[Bearbeiten] Rückgabewert

(None)
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(none)
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[Bearbeiten] Ausnahmen

std::future_error auf den folgenden Fehler:
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std::future_error on the following error conditions:
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  • Die gespeicherte Aufgabe wurde bereits aufgerufen. Der Fehler Kategorie wird promise_already_satisfied gesetzt .
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    The stored task has already been invoked. The error category is set to promise_already_satisfied.
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  • *this hat keinen gemeinsamen Staat. Der Fehler Kategorie wird no_state gesetzt .
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    *this has no shared state. The error category is set to no_state.
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[Bearbeiten] Notes

A successful call to opetator() synchronizes with a call to any member function of a std::future or std::shared_future that share their shared state with *this.

[Bearbeiten] Beispiel

This section is incomplete
Reason: no example

[Bearbeiten] Siehe auch
führt die Funktion sicherzustellen, dass das Ergebnis fertig ist erst einmal die aktuelle Thread beendet
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executes the function ensuring that the result is ready only once the current thread exits
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