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In software engineering, double-checked locking (also known as "double-checked locking optimization" [1]) is a software design pattern used to reduce the overhead of acquiring a lock by testing the locking criterion (the "lock hint") before acquiring the lock. Locking occurs only if the locking criterion check indicates that locking is required.
IBM article "Double-checked locking and the Singleton pattern" by Peter Haggar; Geary, David (April 25, 2003). "How to navigate the deceptively simple Singleton pattern". Java Design Patterns. JavaWorld; Google Singleton Detector (analyzes Java bytecode to detect singletons)
In software engineering, concurrency patterns are those types of design patterns that deal with the multi-threaded programming paradigm. Examples of this class of patterns include: Active object [1] [2] Balking pattern; Barrier; Double-checked locking; Guarded suspension; Leaders/followers pattern; Monitor Object; Nuclear reaction; Reactor ...
Pattern-Oriented Software Architecture is a series of software engineering books ... Strategized Locking; Thread-Safe Interface; Double-checked locking; Concurrency ...
Double-checked locking: Reduce the overhead of acquiring a lock by first testing the locking criterion (the 'lock hint') in an unsafe manner; only if that succeeds does the actual locking logic proceed. Can be unsafe when implemented in some language/hardware combinations. It can therefore sometimes be considered an anti-pattern. Yes —
In a software design pattern view, ... Uses double-checked locking * pattern for using in highly concurrent environments. * @param type Any allowed fruit type, ...
Apple didn't invent the MP3 player, smartphone, or tablet computer, but it disrupted each of those markets with user-friendly devices tethered to sticky software ecosystems.
Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns. The book was written by Erich Gamma , Richard Helm , Ralph Johnson , and John Vlissides , with a foreword by Grady Booch .