[all-commits] [llvm/llvm-project] 2c9cb8: [Support] Fix race in threading test, found by TSan

[Sam McCall via All-commits]

  Branch: refs/heads/release/10.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 2c9cb89d0d00dc8669410a7d57ada11c5f7f8409
      https://github.com/llvm/llvm-project/commit/2c9cb89d0d00dc8669410a7d57ada11c5f7f8409
  Author: Sam McCall <sam.mccall at gmail.com>
  Date:   2020-01-27 (Mon, 27 Jan 2020)

  Changed paths:
    M llvm/unittests/Support/Threading.cpp

  Log Message:
  -----------
  [Support] Fix race in threading test, found by TSan

(cherry picked from commit 18e6a65bae93a7bf0e718415b394fe4b0f09221e)