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std::lock_guard

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Mutual exclusion
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Gestión de bloqueos genérico
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Generic lock management
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lock_guard(C++11)
unique_lock(C++11)
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lock(C++11)
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std::lock_guard
Las funciones miembro
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Member functions
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lock_guard::lock_guard
lock_guard::~lock_guard
 
Defined in header <mutex>
template< class Mutex >
class lock_guard;
(desde C++11)
El lock_guard clase es un contenedor mutex que proporciona un mecanismo RAII-estilo conveniente para ser dueño de un mutex para la duración de un bloque de ámbito .
Original:
The class lock_guard is a mutex wrapper that provides a convenient RAII-estilo mechanism for owning a mutex for the duration of a scoped block.
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Cuando un objeto se crea lock_guard, intenta tomar posesión de la exclusión mutua se da. Cuando el control abandona el ámbito en el que se creó el objeto lock_guard, el lock_guard se destruye y se libera el mutex .
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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La clase lock_guard no es copiable. El tipo Mutex suministrado deberá aplicar el concepto BasicLockable .
Original:
The lock_guard class is non-copyable. The supplied Mutex type shall implement the BasicLockable concept.
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[editar] Tipos de miembros

Miembro de tipo
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Member type
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Definition
mutex_type
Mutex
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Mutex
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[editar] Las funciones miembro

construye una lock_guard, opcionalmente bloquear el mutex dado
Original:
constructs a lock_guard, optionally locking the given mutex
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(miembro público función) [edit]
destructs el objeto lock_guard, desbloquea el mutex subyacente
Original:
destructs the lock_guard object, unlocks the underlying mutex
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(miembro público función) [edit]

[editar] Ejemplo

#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();
}