std::shared_timed_mutex::try_lock_shared_for

 

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std::shared_timed_mutex

Member functions

shared_timed_mutex::shared_timed_mutex

shared_timed_mutex::~shared_timed_mutex

Exclusive locking

shared_timed_mutex::lock

shared_timed_mutex::try_lock

shared_timed_mutex::try_lock_for

shared_timed_mutex::try_lock_until

shared_timed_mutex::unlock

Shared locking

shared_timed_mutex::lock_shared

shared_timed_mutex::try_lock_shared

shared_timed_mutex::try_lock_shared_for

shared_timed_mutex::try_lock_shared_until

shared_timed_mutex::unlock_shared

 

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

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).

See also

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