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...

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 …

Sep 18, 2023 · std::atomic<int> id{0}; int create_id() { id++; return id.load(); } But I assume it's possible for that function to return the same value twice, right? For example, thread A calls the …

Sep 6, 2018 · Everything works. Note that "atomic" is contextual: in this case, the upsert operation only needs to be atomic with respect to operations on the answers table in the database; the …

Oct 20, 2014 · Why the standard make that difference? It seems as both designate, in the same way, an atomic type.

Performance. atomic_shared_ptr<> as a distinct type has an important efficiency advantage over the functions in [util.smartptr.shared.atomic] — it can simply store an additional atomic_flag (or …

2 ++ might be atomic on your compiler/platform, but in the c++ specs it is not defined to be atomic. If you want to make sure to modify a value in an atomic way, you should use the appropiate …

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 …

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 …

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 …