std::mutex::try_lock

 

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std::mutex

Funções de membro 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.

mutex::mutex

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

mutex::lock

mutex::try_lock

mutex::unlock

Identificador 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.

mutex::native_handle

 

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

Tenta bloquear o mutex. Retorna imediatamente. Por volta de bloqueio de sucesso aquisição true, caso contrário retorna false.

Original:

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

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Parâmetros

(Nenhum)

Original:

(none)

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Valor de retorno

true se o bloqueio foi adquirida com sucesso, caso contrário, false.

Original:

true if the lock was acquired successfully, otherwise false.

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Exemplo

Este exemplo mostra try_lock bloquear e desbloquear em ação

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)}

Saída:

lock acquired lock not acquired (program hangs)

Veja também

lock	bloqueia o mutex, blocos se o mutex não está disponível 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. (função pública membro)
unlock	destrave o 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. (função pública membro)