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std::shared_lock::try_lock

STD：：共享[医]锁：：试一试[医]锁

bool try_lock(​(since C++14)

尝试在不阻塞的情况下将相关互斥锁在共享模式下。有效呼叫mutex()->try_lock_shared()...

std::system_error如果没有关联的互斥对象，或者互斥对象已经锁定，则引发。

参数

%280%29

返回值

true如果互斥体的所有权已经成功获得，false否则。

例外

  • 引发的任何异常mutex()->try_lock_shared()

  • 如果没有关联的互斥，std::system_error错误代码为std::errc::operation_not_permitted

  • 如果互斥锁已经锁定，std::system_error错误代码为std::errc::resource_deadlock_would_occur

例

另见

try_locktries to lock the associated mutex (public member function)
locklocks the associated mutex (public member function)
try_lock_fortries to lock the associated mutex, for the specified duration (public member function)
try_lock_untiltries to lock the associated mutex, until a specified time point (public member function)
unlockunlocks the associated mutex (public member function)

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