atomic bombdropped on hiroshima date represents a topic that has garnered significant attention and interest. What does "atomic" mean in programming? 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]. c++ - What exactly is std::atomic? Additionally, 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. In this context, 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.
c++ - How to use std::atomic efficiently - Stack Overflow. Another key aspect involves, std::atomic is new feature introduced by c++11 but I can't find much tutorial on how to use it correctly. Building on this, so are the following practice common and efficient? One practice I used is we have a buff...
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 are atomic operations for newbies? 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. atomic operations and atomic transactions - Stack Overflow. Can someone explain to me, whats the difference between atomic operations and atomic transactions?
Its seems to me that these two are the same thing.Is that correct? Another key aspect involves, when do I really need to use atomic<bool> instead of bool?. Isn't atomic<bool> redundant because bool is atomic by nature?
I don't think it's possible to have a partially modified bool value. It's important to note that, 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. Similarly, non-atomic changes the generated code.
If you are writing your own setter/getters, atomic/nonatomic ... What are atomic types in the C language?
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