Atomic Bomb Names

When exploring atomic bomb names, it's essential to consider various aspects and implications. 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++ - How to implement an atomic counter - Stack Overflow. Moreover, 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 function, increments the value, but then halts while thread B comes in and also increments the value, finally A and B both return the same value.

So using mutexes, the function might look like this: 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. c++ - What exactly is std::atomic? 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. Is there a difference between the _Atomic type qualifier and type .... In this context, why the standard make that difference? It seems as both designate, in the same way, an atomic type.

When do I really need to use atomic<bool> instead of bool?. It's important to note that, 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 your program contains race-conditions, the behavior is undefined. This perspective suggests that, 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. From another angle, 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 types in the C language? 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... What's the difference between the atomic and nonatomic attributes?. What "atomic" does not do is make any guarantees about thread safety. If thread A is calling the getter simultaneously with thread B and C calling the setter with different values, thread A may get any one of the three values returned -- the one prior to any setters being called or either of the values passed into the setters in B and C. Equally important, likewise, the object may end up with the value from B or ...

c++ - How to use std::atomic efficiently - Stack Overflow.