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Andrey Semashev c849b6d877 Use 32-bit storage to implement atomic_flag. 
Most platforms that support futexes or similar mechanisms support it
for 32-bit integers, which makes it more preferred to implement
atomic_flag efficiently. Most architectures also support 32-bit atomic
operations natively as well.

Also, reduced code duplication in instantiating operation backends.
2020-06-03 01:48:48 +03:00
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boost
Use 32-bit storage to implement atomic_flag.
2020-06-03 01:48:48 +03:00