May 8, 2015 · 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 …

Apr 14, 2022 · 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 …

Jun 4, 2014 · 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 …

Apr 6, 2015 · 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 …

Aug 13, 2015 · 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. …

Aug 23, 2024 · There is the proposal P1478R8: Byte-wise atomic memcpy, which covers my exact use case. This proposal suggests to add atomic_load_per_byte_memcpy and …

Sep 24, 2010 · 5 Boolean primitive type is atomic for write and read operations, volatile guarantees the happens-before principle. So if you need a simple get () and set () then you don't need the …

Aug 8, 2014 · In addition (and more importantly), note that std::atomic must support all operations for all possible data types, so even if you declare a ten million byte struct, you can use compare_exchange …

Jul 25, 2018 · However concurrent reads to atomic appends may see torn writes depending on OS, filing system, and what flags you opened the file with - the increment of the maximum file extent is atomic, …

Jan 21, 2011 · What operations in Java are considered atomic? In Java, the reading and writing of 32-bit or smaller quantities are guaranteed to be atomic. By atomic, we mean each action takes place in …