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    std::lock_guard

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    <metanoindex/>

     
    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
    Original:
    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::lock_guard
    Member-Funktionen
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    Member functions
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    lock_guard::lock_guard
    lock_guard::~lock_guard
     
    <tbody> </tbody>
    definiert in Header <mutex>
    template< class Mutex > class lock_guard;
    		 (seit C++11)
    Die Klasse lock_guard ist ein Mutex Wrapper, eine bequeme RAII-Stil Mechanismus für den Besitz eines Mutex für die Dauer eines scoped Block stellt .
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    The class lock_guard is a mutex wrapper that provides a convenient RAII-Stil mechanism for owning a mutex for the duration of a scoped block.
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    Wenn ein lock_guard Objekt erstellt wird, versucht er, Besitz des Mutex ist es gegeben zu nehmen. Wenn die Steuerung den Umfang, in dem die lock_guard Objekt erstellt wurde verlässt, wird die lock_guard zerstört und der Mutex freigegeben wird .
    Original:
    When a lock_guard object is created, it attempts to take ownership of the mutex it is given. When control leaves the scope in which the lock_guard object was created, the lock_guard is destructed and the mutex is released.
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    Die lock_guard Klasse ist nicht kopierbar. Die mitgelieferte Mutex Art führt den BasicLockable Konzept .
    Original:
    The lock_guard class is non-copyable. The supplied Mutex type shall implement the BasicLockable concept.
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    Mitglied Typen

    Mitglied Typ
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    Member type
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    		 Definition
    mutex_type
    Mutex
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    Mutex
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    Member-Funktionen
    konstruiert eine lock_guard, gegebenenfalls Verriegeln des gegebenen Mutex
    Original:
    constructs a lock_guard, optionally locking the given mutex
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    (öffentliche Elementfunktion) [edit]
    zerstört sich die lock_guard Objekt, entriegelt die zugrunde liegenden Mutex
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    destructs the lock_guard object, unlocks the underlying mutex
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    (öffentliche Elementfunktion) [edit]

    Beispiel

    #include <thread>
#include <mutex>

int g_i = 0;
std::mutex g_i_mutex;  // protects g_i

void safe_increment()
{
    std::lock_guard<std::mutex> lock(g_i_mutex);
    ++g_i;

    // g_i_mutex is automatically released when lock
    // goes out of scope
}

int main()
{
    std::thread t1(safe_increment);
    std::thread t2(safe_increment);

    t1.join();
    t2.join();
}