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std::condition_variable_any::notify_one

De cppreference.com

 
 
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
Original:
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
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_any
Les fonctions membres
Original:
Member functions
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condition_variable_any::condition_variable_any
condition_variable_any::~condition_variable_any
Notification
Original:
Notification
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condition_variable_any::notify_one
condition_variable_any::notify_all
D'attente
Original:
Waiting
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condition_variable_any::wait
condition_variable_any::wait_for
condition_variable_any::wait_until
Handle natif
Original:
Native handle
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condition_variable_any::native handle
 
void notify_one();
(depuis C++11)
Si tous les threads sont en attente sur *this, appelant débloque notify_one l'un des threads en attente .
Original:
If any threads are waiting on *this, calling notify_one unblocks one of the waiting threads.
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Sommaire

[modifier] Paramètres

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

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

noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Exemple

#include <iostream>
#include <condition_variable>
#include <thread>
#include <chrono>
 
std::condition_variable_any cv;
std::mutex cv_m;
int i = 0;
bool done = false;
 
void waits()
{
    std::unique_lock<std::mutex> lk(cv_m);
    std::cout << "Waiting... \n";
    cv.wait(lk, [](){return i == 1;});
    std::cout << "...finished waiting. i == 1\n";
    done = true;
}
 
void signals()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
    std::cout << "Notifying...\n";
    cv.notify_one();
 
    std::unique_lock<std::mutex> lk(cv_m);
    i = 1;
    while (!done) {
        lk.unlock();
        std::this_thread::sleep_for(std::chrono::seconds(1));
        lk.lock();
        std::cerr << "Notifying again...\n";
        cv.notify_one();
    }
}
 
int main()
{
    std::thread t1(waits), t2(signals);
    t1.join(); t2.join();
}

Résultat possible :

Waiting...
Notifying...
Notifying again...
...finished waiting. i == 1

[modifier] Voir aussi

notifie à tous les threads en attente
Original:
notifies all waiting threads
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(fonction membre publique) [edit]