Answer by Peter Cordes for Memory order consume usage in C11
consume is cheaper than acquire. All CPUs (except DEC Alpha AXP's famously weak memory model1) do it for free, unlike acquire. (Except on x86 and SPARC-TSO, where the hardware has acq/rel memory...
View ArticleAnswer by janneb for Memory order consume usage in C11
memory_order_consume is currently underspecified, and there is some ongoing work to fix it. Currently AFAIK all implementations implicitly promote it to memory_order_acquire.
View ArticleMemory order consume usage in C11
I read about the carries a dependency relation and dependency-ordered before that uses one in its definition 5.1.2.4(p16):An evaluation A is dependency-ordered before an evaluation B if: —A performs a...
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