[all-commits] [llvm/llvm-project] a9c3c1: Reland "[Support] Add a way to run a function on a...

[Sam McCall via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: a9c3c176ad741b9c2b915abc59dd977d0299c53f
      https://github.com/llvm/llvm-project/commit/a9c3c176ad741b9c2b915abc59dd977d0299c53f
  Author: Sam McCall <sammccall at google.com>
  Date:   2019-10-23 (Wed, 23 Oct 2019)

  Changed paths:
    M clang/tools/libclang/CIndex.cpp
    M llvm/include/llvm/Support/Threading.h
    M llvm/lib/Support/CrashRecoveryContext.cpp
    M llvm/lib/Support/Threading.cpp
    M llvm/lib/Support/Unix/Threading.inc
    M llvm/lib/Support/Unix/Unix.h
    M llvm/lib/Support/Windows/Process.inc
    M llvm/lib/Support/Windows/Threading.inc
    M llvm/lib/Support/Windows/WindowsSupport.h
    M llvm/unittests/Support/Threading.cpp

  Log Message:
  -----------
  Reland "[Support] Add a way to run a function on a detached thread""

This reverts commit 7bc7fe6b789d25d48d6dc71d533a411e9e981237.
The immediate callers have been fixed to pass nullopt where appropriate.