std::timed_mutex::try_lock

 

C++

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Algoritmi

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Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Discussione libreria di supporto

Threads Original: Threads The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
thread (C++11)
this_thread spazio dei nomi Original: this_thread namespace The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
Mutua esclusione Original: Mutual exclusion The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
mutex (C++11) timed_mutex (C++11)	recursive_mutex (C++11) recursive_timed_mutex (C++11)
Blocco di gestione generico Original: Generic lock management The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 Original: Condition variables The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
Futures Original: Futures The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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::timed_mutex

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

timed_mutex::timed_mutex

Bloccaggio Original: Locking The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

timed_mutex::lock

timed_mutex::try_lock

timed_mutex::try_lock_for

timed_mutex::try_lock_until

timed_mutex::unlock

Maniglia nativo Original: Native handle The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

timed_mutex::native_handle

 

bool try_lock();		(dal C++11)

Tenta di bloccare il mutex. Ritorna immediatamente. Il successo restituisce acquisizione blocco true, altrimenti restituisce false.

Original:

Tries to lock the mutex. Returns immediately. On successful lock acquisition returns true, otherwise returns false.

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Parametri

(Nessuno)

Original:

(none)

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Valore di ritorno

true se il blocco è stato acquisito con successo, altrimenti false.

Original:

true if the lock was acquired successfully, otherwise false.

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Esempio

Questo esempio mostra blocco, try_lock e sbloccare in azione

Original:

This example shows lock, try_lock and unlock in action

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#include <iostream>#include <mutex>   int main(){std::mutex test;if(test.try_lock()==true)std::cout<<"lock acquired"<<std::endl;elsestd::cout<<"lock not acquired"<<std::endl; test.unlock();//now unlock the mutex test.lock();//to lock it againif(test.try_lock())//true can be left outstd::cout<<"lock acquired"<<std::endl;elsestd::cout<<"lock not acquired"<<std::endl; test.lock();//and now the finale (a block)}

Output:

lock acquired lock not acquired (program hangs)

Vedi anche

lock	blocca i blocchi mutex, se il mutex non è disponibile Original: locks the mutex, blocks if the mutex is not available The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
try_lock_for	prova a bloccare il mutex, restituisce se il mutex è been unavailable per la durata del timeout specificato Original: tries to lock the mutex, returns if the mutex has been unavailable for the specified timeout duration The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
try_lock_until	prova a bloccare il mutex, restituisce se il mutex è been unavailable fino al punto di tempo specificato è stato raggiunto Original: tries to lock the mutex, returns if the mutex has been unavailable until specified time point has been reached The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
unlock	sblocca il mutex Original: unlocks the mutex The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)