Eukaryotes. Eukaryotes are organisms made up of cells that possess a membrane-bound nucleus (that holds genetic material) as well as membrane-bound organelles. Genetic material in eukaryotes is contained within a nucleus within the cell and DNA is organized into chromosomes. Eukaryotic organisms may be multicellular or single-celled organisms. All animals are eukaryotes. Other eukaryotes include plants, fungi, and protists. A typical eukaryotic cell might contain the following parts: plasma membrane; nucleolus
A unique_lock can be created without immediately locking, can unlock at any point in its existence, and can transfer ownership of the lock from one instance to another. So you always use lock_guard, unless you need the capabilities of unique_lock. A condition_variable needs a unique_lock.
Lock Granularity. 1  SQL Server can lock resources at the table, page, partition or row level. 2  If locks are escalated, SQL Server can also lock a single partition of a table or index. 3  SQL Server can also lock index keys and ranges of index keys if needed. Intent Locks. 2  As the name suggests is a pre-qualifiers to shared/update/exclusive locks. 3  Since SQL Server can acquire locks at different levels, before the process completes or the statements completes SQL Server might want to know if locks are already acquired.