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What does "atomic" mean in programming? - Stack Overflow
22 Atomic vs. Non-Atomic Operations "An operation acting on shared memory is atomic if it completes in a single step relative to other threads. When an atomic store is performed on a shared memory, no other thread can observe the modification half-complete.
c++ - How to implement an atomic counter - Stack Overflow
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 class that is wrapping this and put the initialization somewhere else.
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.
c++ - How to use std::atomic efficiently - Stack Overflow
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 guarantee 64-bit writes are atomic? - Stack Overflow
When can 64-bit writes be guaranteed to be atomic, when programming in C on an Intel x86-based platform (in particular, an Intel-based Mac running MacOSX 10.4 using the Intel compiler)? For exampl...
What are atomic operations for newbies? - Stack Overflow
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 computer can be free to do other things as long as they don't affect (or are affected by) the result of what upsert is trying to do.
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.
What's the difference between the atomic and nonatomic attributes?
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 recent versions of llvm/clang). Assuming that you are @synthesizing the method implementations, atomic vs. non-atomic changes the generated code. If you are writing your own setter/getters, atomic/nonatomic ...
Which types on a 64-bit computer are naturally atomic in gnu C and gnu ...
I had a 25-hr debugging marathon in < 2 days and then wrote this answer here. See also the bottom of this question for more info. and documentation on 8-bit variables having naturally atomic writes and naturally atomic reads for AVR 8-bit microcontrollers when compiled with the gcc compiler which uses the AVR-libc library.
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...
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