std::shared_lock<Mutex>::try_lock_for
bool try_lock_for( const std::chrono::duration <Rep,Period>& timeout_duration );
Tries to lock the associated mutex in shared mode. Blocks until specified timeout_duration has elapsed or the lock is acquired, whichever comes first. On successful lock acquisition returns true, otherwise returns false. Effectively calls mutex()->try_lock_shared_for(timeout_duration).
This function may block for longer than timeout_duration due to scheduling or resource contention delays.
The standard recommends that a steady clock is used to measure the duration. If an implementation uses a system clock instead, the wait time may also be sensitive to clock adjustments.
std::system_error is thrown if there is no associated mutex or if the mutex is already locked.
The behavior is undefined if Mutex does not meet the SharedTimedLockable requirements.
[edit] Parameters
[edit] Return value
true if the ownership of the mutex has been acquired successfully, false otherwise.
[edit] Exceptions
- Any exceptions thrown by mutex()->try_lock_shared_for(timeout_duration).
- If there is no associated mutex, std::system_error with an error code of std::errc::operation_not_permitted .
- If the mutex is already locked, std::system_error with an error code of std::errc::resource_deadlock_would_occur .
[edit] Example
Reason: no example
[edit] See also
(public member function of
std::unique_lock<Mutex>) [edit]