std::lock_guard
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| Déclaré dans l'en-tête <mutex>
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| template< class Mutex > class lock_guard; |
(depuis C++11) | |
La classe
lock_guard mutex est une enveloppe qui fournit un mécanisme RAII de style commode pour posséder un mutex pour la durée d'un bloc de portée . Original:
The class
lock_guard is a mutex wrapper that provides a convenient RAII de style mechanism for owning a mutex for the duration of a scoped block. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Quand un objet est créé
lock_guard, il tente de prendre la propriété du mutex il est donné. Lorsque le contrôle quitte le champ dans lequel l'objet a été créé lock_guard, le lock_guard est détruit et le mutex est libéré .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.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
La classe
lock_guard est non copiable. Le type Mutex fourni doit mettre en œuvre le concept BasicLockable .Original:
The
lock_guard class is non-copyable. The supplied Mutex type shall implement the BasicLockable concept.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[modifier] Types de membres
| Type du membre | Définition |
mutex_type
|
Mutex
Original: Mutex The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[modifier] Fonctions membres
| construit un lock_guard, éventuellement verrouiller le mutex Original: constructs a lock_guard, optionally locking the given mutex The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
| Détruit l'objet lock_guard, déverrouille le mutex sous-jacent Original: destructs the lock_guard object, unlocks the underlying mutex The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
[modifier] Exemple
#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(); }
