c++ - What exactly is std::atomic? - Stack Overflow
Aug 13, 2015 · Objects of atomic types are the only C++ objects that are free from data races; that is, if one thread writes to an atomic object while another thread reads from it, the behavior is well-defined. …
c++ - How to implement an atomic counter - Stack Overflow
Sep 18, 2023 · Fortunately, the value initializing constructor of an integral atomic is constexpr, so the above leads to constant initialization. Otherwise you'd want to make it -say- a static member of a …
What does "atomic" mean in programming? - Stack Overflow
In the Effective Java book, it states: The language specification guarantees that reading or writing a variable is atomic unless the variable is of type long or double [JLS, 17.4.7]. What do...
c++ - How to use std::atomic efficiently - Stack Overflow
Jan 6, 2012 · std::atomic is new feature introduced by c++11 but I can't find much tutorial on how to use it correctly. So are the following practice common and efficient? One practice I used is we have a buff...
How to initialize a static std::atomic data member
0 Since std::atomic_init has been deprecated in C++20, here is a reimplementation which does not raise deprecation warnings, if you for some reason want to keep doing this.
sql - What is atomicity in dbms - Stack Overflow
Jun 4, 2014 · The definition of atomic is hazy; a value that is atomic in one application could be non-atomic in another. For a general guideline, a value is non-atomic if the application deals with only a …
What is the difference between std::shared_ptr and std::atomic<std ...
The atomic "thing" in shared_ptr is not the shared pointer itself, but the control block it points to. meaning that as long as you don't mutate the shared_ptr across multiple threads, you are ok. do note …
When do I really need to use atomic<bool> instead of bool?
May 1, 2013 · You need atomic<bool> to avoid race-conditions. A race-condition occurs if two threads access the same memory location, and at least one of them is a write operation. If your program …
What's the difference between the atomic and nonatomic attributes?
Feb 26, 2009 · The last two are identical; "atomic" is the default behavior (note that it is not actually a keyword; it is specified only by the absence of nonatomic -- atomic was added as a keyword in …
Is there a difference between the _Atomic type qualifier and type ...
Oct 20, 2014 · Why the standard make that difference? It seems as both designate, in the same way, an atomic type.