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- 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
- 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
- c++ - the gist behind atomic shared pointer - Stack Overflow
At least atomic<shared_ptr<T>> gives you per-object locking, instead of a single lock for the whole stack So multiple threads can be waiting for different locks if multiple pops start in parallel
- 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
- 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
- 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
- When do I really need to use atomic lt;bool gt; instead of bool?
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
- c++ - What is the difference between load store relaxed atomic and . . .
11 The difference is that a normal load store is not guaranteed to be tear-free, whereas a relaxed atomic read write is Also, the atomic guarantees that the compiler doesn't rearrange or optimise-out memory accesses in a similar fashion to what volatile guarantees (Pre-C++11, volatile was an essential part of rolling your own atomics
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