What does "atomic" mean in programming? - Stack Overflow
May 8, 2015 · 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++ - 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. …
What are atomic types in the C language? - Stack Overflow
Apr 30, 2016 · I remember I came across certain types in the C language called atomic types, but we have never studied them. So, how do they differ from regular types like int,float,double,long etc., and …
Is there a difference between the _Atomic type qualifier and type ...
Oct 20, 2014 · Atomic type specifiers :-:) Syntax: _Atomic ( type-name ); You can declare an atomic integer like this: _Atomic(int) counter; The _Atomic keyword can be used in the form _Atomic(T), …
c++ - the gist behind atomic shared pointer - Stack Overflow
Jan 23, 2025 · At least atomic<shared_ptr<T>> gives you per-object locking, instead of a single lock for the whole stack. So multiple threads can be waiting for different locks if multiple pops start in parallel.
Is incrementing an int effectively atomic in specific cases?
The reason num++ appears to be atomic is because on x86 machines, incrementing a 32-bit integer is, in fact, atomic (assuming no memory retrieval takes place). But this is neither guaranteed by the c++ …
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 …
std::atomic | compare_exchange_weak vs. compare_exchange_strong
@CygnusX1 yes, that is covered in the C++ standard by the rest of the note, which OP left out of the quote: "When a compare-and-exchange is in a loop, the weak version will yield better performance …
linux - Is rename () atomic? - Stack Overflow
But rename() is still atomic in a very important sense: if you use it to overwrite a file, then you will end up with either the old or the new version and nothing else. [update: but as @jonas-wielicki points out in …
c - "atomic_t" in Linux - Stack Overflow
Jan 12, 2016 · I'm studying Linux kernel with Linux Kernel Development by Robert Love. As you know, this book uses an old version of Linux. It's in 2.6 version. atomic_t has volatile int counter. But newly …