Attempts to acquire a shared-ownership lock on the mutex associated with
*this
within the time specified.
template<typename Rep, typename Period> bool try_lock_for( std::chrono::duration<Rep,Period> const& relative_time);
The Mutex type
used to instantiate std::shared_lock must meet
the TimedLockable requirements.
this->mutex()!=NULL, this->owns_lock()==false.
Calls this->mutex()->try_lock_shared_for(relative_time).
true if the call to
this->mutex()->try_lock_shared_for()
returned true, false otherwise.
Any exceptions thrown by this->mutex()->try_lock_shared_for(). std::system_error with an error
code of std::errc::operation_not_permitted if this->mutex()==NULL. std::system_error with an error
code of std::errc::resource_deadlock_would_occur
if this->owns_lock()==true on entry.
If the function returns true,
this->owns_lock()==true, otherwise this->owns_lock()==false.
#include <shared_mutex>