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std::unique_lock::try_lock - cppreference.com

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bool try_lock();

(desde C++11)

Tenta bloquear o mutex associado sem bloqueio. Efetivamente chama mutex()->try_lock().

Original:

Tries to lock the associated mutex without blocking. Effectively calls mutex()->try_lock().

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std::system_error é lançada se não houver mutex associado, ou se o mutex já está trancada.

Original:

std::system_error is thrown if there is no associated mutex or if the mutex is already locked.

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Parâmetros

(Nenhum)

Original:

(none)

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Valor de retorno

true se a propriedade do mutex foi adquirido com sucesso, caso contrário false.

Original:

true if the ownership of the mutex has been acquired successfully, false otherwise.

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Exceções

  • Todas as exceções lançadas por mutex()->try_lock()

    Original:

    Any exceptions thrown by mutex()->try_lock()

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  • Se não houver um mutex associado, std::system_error com um código de erro de std::errc::operation_not_permitted

    Original:

    If there is no associated mutex, std::system_error with an error code of std::errc::operation_not_permitted

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  • Se o mutex já está bloqueado std::system_error, com um código de erro de std::errc::resource_deadlock_would_occur

    Original:

    If the mutex is already locked, std::system_error with an error code of std::errc::resource_deadlock_would_occur

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Exemplo

Veja também

locks the associated mutex
(função pública membro) [edit]

tentativas de bloquear o mutex associado TimedLockable, os retornos se o mutex esteve indisponível durante o período de tempo especificado

Original:

attempts to lock the associated TimedLockable mutex, returns if the mutex has been unavailable for the specified time duration

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(função pública membro) [edit]

tenta bloquear o associado TimedLockable mutex, retorna se o mutex tem sido disponível até que ponto especificado de tempo tenha sido atingido

Original:

tries to lock the associated TimedLockable mutex, returns if the mutex has been unavailable until specified time point has been reached

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(função pública membro) [edit]

destrave o mutex associado

Original:

unlocks the associated mutex

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(função pública membro) [edit]