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- c++ - What exactly is std::atomic? - Stack Overflow
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 In addition, accesses to atomic objects may establish inter-thread synchronization and order non-atomic memory accesses as specified by std::memory_order
- 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
- 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++ standard, nor is it likely to be the case on a machine that doesn't use the x86 instruction set
- Is there a difference between the _Atomic type qualifier and type . . .
Why the standard make that difference? It seems as both designate, in the same way, an atomic type
- What are atomic types in the C language? - Stack Overflow
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 what are
- sql - What is atomicity in dbms - Stack Overflow
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 part of the value Eg: The current Wikipedia article on First NF (Normal Form) section Atomicity actually quotes from the introductory parts above
- 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 the comments, you need to make sure the file you are renaming actually has up-to-date contents, using fsync() and friends ]
- When to use AtomicReference in Java? - Stack Overflow
When do we use AtomicReference? Is it needed to create objects in all multithreaded programs? Provide a simple example where AtomicReference should be used
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