[PATCH] D45196: [libc++abi] Replace __sync_* functions with __libcpp_atomic_* functions.

[Eli Friedman via Phabricator via cfe-commits]

efriedma created this revision.
efriedma added reviewers: EricWF, compnerd.

This is basically part 2 of r313694.

It's a little unfortunate that I had to copy-paste atomic_support.h, but I don't really see any alternative.

The refstring.h changes are the same as the libcxx changes in r313694.


Repository:
  rCXXA libc++abi

https://reviews.llvm.org/D45196

Files:
  src/cxa_default_handlers.cpp
  src/cxa_exception.cpp
  src/cxa_handlers.cpp
  src/include/atomic_support.h
  src/include/refstring.h

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