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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.
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 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.
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.
When do I really need to use atomic instead of bool?
You need atomic 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.
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...
Is an atomic file rename (with overwrite) possible on Windows?
On POSIX systems rename(2) provides for an atomic rename operation, including overwriting of the destination file if it exists and if permissions allow. Is there any way to get the same semantics on
R Error in x$ed : $ operator is invalid for atomic vectors
Because $ does not work on atomic vectors. Use [ or [[ instead. From the help file for $: The default methods work somewhat differently for atomic vectors, matrices/arrays and for recursive (list-like, see is.recursive) objects. $ is only valid for recursive objects, and is only discussed in the section below on recursive objects. x[["ed"]] will work.
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...
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...
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