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std::shared_lock::try_lock_for(3) C++ Standard Libary std::shared_lock::try_lock_for(3)


std::shared_lock::try_lock_for - std::shared_lock::try_lock_for


template< class Rep, class Period >
bool try_lock_for( const std::chrono::duration<Rep,Period>& (since C++14)
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

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


timeout_duration - maximum duration to block for

Return value

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


* 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

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


This section is incomplete
Reason: no example

See also

attempts to lock (i.e., takes ownership of) the associated
try_lock_for TimedLockable mutex, returns if the mutex has been unavailable for
the specified time duration
(public member function of std::unique_lock<Mutex>)
lock locks the associated mutex
(public member function)
try_lock tries to lock the associated mutex
(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)