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std::condition_variable_any::notify_all

De cppreference.com

 
 
Tema Biblioteca de ayuda
Threads
Original:
Threads
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(C++11)
this_thread espacio de nombres
Original:
this_thread namespace
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(C++11)
(C++11)
(C++11)
Exclusión mutua
Original:
Mutual exclusion
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(C++11)
Gestión de bloqueos genérico
Original:
Generic lock management
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(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
Las variables de condición
Original:
Condition variables
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(C++11)
Futuros
Original:
Futures
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(C++11)
(C++11)
(C++11)
(C++11)
 
std::condition_variable_any
Las funciones miembro
Original:
Member functions
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Notificación
Original:
Notification
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condition_variable_any::notify_all
Espera
Original:
Waiting
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void notify_all();
(desde C++11)

Unblocks all threads currently waiting for *this.

Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

(Ninguno)
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(none)
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ejemplo

[editar]
#include <iostream>
#include <condition_variable>
#include <thread>
#include <chrono>
 
std::condition_variable_any cv;
std::mutex cv_m;
int i = 0;
 
void waits()
{
    std::unique_lock<std::mutex> lk(cv_m);
    std::cerr << "Waiting... \n";
    cv.wait(lk, [](){return i == 1;});
    std::cerr << "...finished waiting. i == 1\n";
}
 
void signals()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
    std::cerr << "Notifying...\n";
    cv.notify_all();
    std::this_thread::sleep_for(std::chrono::seconds(1));
    i = 1;
    std::cerr << "Notifying again...\n";
    cv.notify_all();
}
 
int main()
{
    std::thread t1(waits), t2(waits), t3(waits), t4(signals);
    t1.join(); 
    t2.join(); 
    t3.join();
    t4.join();
}

Salida:

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

[editar] Ver también

notifica un subproceso en espera
Original:
notifies one waiting thread
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(función miembro público) [editar]