template< class Rep, class Period > bool try_lock_for( const std::chrono::duration<Rep,Period>& timeout_duration ); | (since C++14) |
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)
.
A steady clock is used to measure the duration. This function may block for longer than timeout_duration
due to scheduling or resource contention delays.
std::system_error
is thrown if there is no associated mutex or if the mutex is already locked.
Parameters
timeout_duration | - | maximum duration to block for |
Return value
true
if the ownership of the mutex has been acquired successfully, false
otherwise.
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 ofstd::errc::operation_not_permitted
- If the mutex is already locked,
std::system_error
with an error code ofstd::errc::resource_deadlock_would_occur
Example
See also
attempts to lock the associated TimedLockable mutex, returns if the mutex has been unavailable for the specified time duration (public member function of std::unique_lock ) | |
locks the associated mutex (public member function) | |
tries to lock the associated mutex (public member function) | |
tries to lock the associated mutex, until a specified time point (public member function) | |
unlocks the associated mutex (public member function) |
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