[riot-notifications] [RIOT-OS/RIOT] sys: Added simple memory barrier API (#11438)

Marian Buschsieweke notifications at github.com
Thu Apr 25 11:27:22 CEST 2019

@jcarrano: `__attribute__((always_inline))` could be used to force inlining of `compiler_barrier()` and would be nicer to read in GDB when debugging. It is supported by both GCC and clang for quite some time. Would that be an alternative?

(I believe that the use of inline assembly there is less widely supported than `__attribute__((always_inline))`. If this is correct, this will not reduce compatibility compared to the use of a macro.)

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