[all-commits] [llvm/llvm-project] fbdfff: [libc++] Use Fuchsia futex operations (#133571)

[Roland McGrath via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fbdfff47c7e4cdb29512bc78cad5978fa2a86ce9
      https://github.com/llvm/llvm-project/commit/fbdfff47c7e4cdb29512bc78cad5978fa2a86ce9
  Author: Roland McGrath <mcgrathr at google.com>
  Date:   2026-04-08 (Wed, 08 Apr 2026)

  Changed paths:
    M libcxx/include/__atomic/contention_t.h
    M libcxx/include/__cxx03/__atomic/contention_t.h
    M libcxx/src/atomic.cpp

  Log Message:
  -----------
  [libc++] Use Fuchsia futex operations (#133571)

The basic futex operations have always been available on Fuchsia.
Wire them up to properly support C++20 atomic notify_*/wait.



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