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`std::unique_lock` Try-to-lock Constructor with a duration timeout

Construct a std::unique_lock instance associated with the supplied mutex and tries to acquire a lock on that mutex.

template<typename Rep,typename Period>
unique_lock(
    mutex_type& m,
    std::chrono::duration<Rep,Period> const&
    relative_time);

Preconditions:: The Mutex type used to instantiate std::unique_lock must meet the TimedLockable requirements.
Effects:: Constructs a std::unique_lock instance that references the supplied mutex. Calls m.try_lock_for(relative_time).
Throws:: Nothing.
Postcondition:: this->owns_lock() returns the result of the m.try_lock_for() call, this->mutex()==&m.

Header

#include <mutex>

See Also