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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.
This C++23 implementation is based on the pre-C++98 implementation in the ... IBM article "Double-checked locking and the Singleton pattern" by Peter Haggar; Geary ...
C++. This example is in C++. ... Uses double-checked locking * pattern for using in highly concurrent environments. * @param type Any allowed fruit type, ...
Please read the double-checked locking page and the many sources explaining why double-checked locking does not work. In almost all cases you can use staticly initialized singletons or initialize using an inner class. The 1.5 memory model 'fixes' volatile so you can use that to fix double-checked locking but only on 1.5 and above.
Double-checked locking; Guarded suspension; Leaders/followers pattern; Monitor Object; Nuclear reaction; Reactor pattern; Read write lock pattern; Scheduler pattern;
In C and C++, volatile is a type qualifier, like const, and is a part of a type (e.g. the type of a variable or field). The behavior of the volatile keyword in C and C++ is sometimes given in terms of suppressing optimizations of an optimizing compiler: 1- don't remove existing volatile reads and writes, 2- don't add new volatile reads and writes, and 3- don't reorder volatile reads and writes.
David E. DeLano of C++ Report praised the first volume, writing, "Overall this text is good and I recommend it as an addition to any collection of books on patterns." He said "some of the language and grammar usage feels awkward to the reader" and some of the book has "stiffness and flow problems". [1]
6 How about a derivation of the original DCL that avoids using fences in C++? 1 comment. 7 Why not a paragraph about C++11 ? 1 comment. 8 Why not a paragraph about ...