Varianti

    std::thread::joinable

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    <metanoindex/>

     
    C++
     
    Discussione libreria di supporto
    Threads
    Original:
    Threads
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    thread(C++11)
    this_thread spazio dei nomi
    Original:
    this_thread namespace
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    get_id(C++11)
    yield(C++11)
    sleep_for(C++11)
    sleep_until(C++11)
    Mutua esclusione
    Original:
    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
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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::thread
    Membri classi
    Original:
    Member classes
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    thread::id
    Membri funzioni
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    Member functions
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    thread::thread
    thread::~thread
    thread::operator=
    Osservatori
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    Observers
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    thread::joinable
    thread::get_id
    thread::native_handle
    thread::hardware_concurrency
    Operazioni
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    Operations
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    thread::join
    thread::detach
    thread::swap
    Non membri funzioni
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    Non-member functions
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    std::swap
     
    <tbody> </tbody>
    bool joinable();
    		 (dal C++11)
    Verifica se l'oggetto thread identifica un thread attivo di esecuzione. In particolare, se restituisce true get_id() != std::thread::id().
    Original:
    Checks if the thread object identifies an active thread of execution. Specifically, returns true if get_id() != std::thread::id().
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    Parametri

    (Nessuno)
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    (none)
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    Valore di ritorno

    true se l'oggetto thread identifica un thread attivo di esecuzione, false altrimenti
    Original:
    true if the thread object identifies an active thread of execution, false otherwise
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    Eccezioni

    noexcept specification:  
    <tbody> </tbody>
    noexcept
      (dal C++11)

    Esempio

    #include <iostream>
#include <thread>
#include <chrono>

void foo()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
}

int main()
{
    std::thread t;
    std::cout << "before starting, joinable: " << t.joinable() << '\n';

    t = std::thread(foo);
    std::cout << "after starting, joinable: " << t.joinable() << '\n';

    t.join();
}

    Output: 

    before starting, joinable: 0
after starting, joinable: 1

    Vedi anche
    restituisce l'id' del filo
    Original:
    returns the id of the thread
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    (metodo pubblico) [modifica]
    attesa di un thread per terminare la sua esecuzione
    Original:
    waits for a thread to finish its execution
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    (metodo pubblico) [modifica]
    consente il filo di eseguire indipendentemente dalla impugnatura filo
    Original:
    permits the thread to execute independently from the thread handle
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    (metodo pubblico) [modifica]