NAME¶

std::shared_timed_mutex::try_lock_shared_for - std::shared_timed_mutex::try_lock_shared_for

Synopsis¶

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

Tries to lock the mutex in shared mode. Blocks until specified timeout_duration has
elapsed or the shared lock is acquired, whichever comes first. On successful lock
acquisition returns true, otherwise returns false.

If timeout_duration is less or equal timeout_duration.zero(), the function behaves
like try_lock_shared().

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.

As with try_lock_shared(), this function is allowed to fail spuriously and return
false even if the mutex was not locked by any other thread at some point during
timeout_duration.

Prior unlock() operation on the same mutex synchronizes-with (as defined in
std::memory_order) this operation if it returns true.

If try_lock_shared_for is called by a thread that already owns the mutex in any mode
(shared or exclusive), the behavior is undefined.

Parameters¶

timeout_duration - maximum duration to block for

Return value¶

true if the lock was acquired successfully, otherwise false.

Exceptions¶

Any exception thrown by clock, time_point, or duration during the execution (clocks,
time points, and durations provided by the standard library never throw).

Example¶

This section is incomplete
Reason: no example

See also¶

tries to lock the mutex for shared ownership, returns if the
try_lock_shared mutex is not available
(public member function)
tries to lock the mutex for shared ownership, returns if the
try_lock_shared_until mutex has been
unavailable until specified time point has been reached
(public member function)
tries to lock the mutex, returns if the mutex has been
try_lock_for unavailable for the specified timeout duration
(public member function)

Category:¶

* Todo no example