std::shared_lock::try_lock
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_lock | tries to lock the associated mutex (public member function) |
|---|---|
lock | locks the associated mutex (public member function) |
try_lock_for | tries to lock the associated mutex, for the specified duration (public member function) |
try_lock_until | tries to lock the associated mutex, until a specified time point (public member function) |
unlock | unlocks the associated mutex (public member function) |
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