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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
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 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
Can you read the value of std::atomic_flag without modifying it? On some platforms the only atomic instructions are exchange instructions On such platforms, std::atomic_flag::test_and_set() can be implemented with exchange var,1 and clear() with exchange var,0, but there is no atomic instruction for reading the value So, if you want to read the value without changing it, then you need std::atomic<bool>
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 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
When do I really need to use atomic lt;bool gt; instead of bool? Closed 12 years ago 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 When do I really need to use atomic<bool> instead of bool?
How to initialize a static std::atomic data member Since std::atomic_init has been deprecated in C++20, here is a reimplementation which does not raise deprecation warnings, if you for some reason want to keep doing this