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std::this_thread::yield

De cppreference.com
< cpp‎ | thread

 
 
Bibliothèque de support fil
Threads
Original:
Threads
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thread (C++11)
this_thread espace de noms
Original:
this_thread namespace
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get_id (C++11)
yield (C++11)
sleep_for (C++11)
sleep_until (C++11)
L'exclusion mutuelle
Original:
Mutual exclusion
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mutex (C++11)
timed_mutex (C++11)
Gestion du verrouillage générique
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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)
Les variables de condition
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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)
 
Defined in header <thread>
void yield();
(depuis C++11)
Fournit une indication à la mise en œuvre de reporter l'exécution de threads, ce qui permet aux autres threads de fonctionner .
Original:
Provides a hint to the implementation to reschedule the execution of threads, allowing other threads to run.
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[modifier] Paramètres

(Aucun)
Original:
(none)
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[modifier] Retourne la valeur

(Aucun)
Original:
(none)
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[modifier] Exemple

#include <iostream>
#include <chrono>
#include <thread>
 
// "busy sleep" while suggesting that other threads run 
// for a small amount of time
void little_sleep(std::chrono::microseconds us)
{
    auto start = std::chrono::high_resolution_clock::now();
    auto end = start + us;
    do {
        std::this_thread::yield();
    } while (std::chrono::high_resolution_clock::now() < end);
}
 
int main()
{
    auto start = std::chrono::high_resolution_clock::now();
 
    little_sleep(std::chrono::microseconds(100));
 
    auto elapsed = std::chrono::high_resolution_clock::now() - start;
    std::cout << "waited for "
              << std::chrono::duration_cast<std::chrono::microseconds>(elapsed).count()
              << " microseconds\n";
}

Résultat possible :

waited for 128 microseconds