memory-model

C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ programming?

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First, you have to learn to think like a Language Lawyer. The C++ specification does not make reference to any particular compiler, operating system, or CPU. It makes reference to an abstract machine that is a generalization of actual systems. In the Language Lawyer world, the job of the programmer is to write code for … Read more

Will two atomic writes to different locations in different threads always be seen in the same order by other threads?

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This kind of reordering test is called IRIW (Independent Readers, Independent Writers), where we’re checking if two readers can see the same pair of stores appear in different orders. Related, maybe a duplicate: Acquire/release semantics with 4 threads The very weak C++11 memory model does not require that all threads agree on a global order … Read more

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