[all-commits] [llvm/llvm-project] e9d584: [libc++] Make std::unique_lock available with _LIB...

[Paul Kirth via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e9d5842ac7bd8d9b5700dc415910425ca796f4c1
      https://github.com/llvm/llvm-project/commit/e9d5842ac7bd8d9b5700dc415910425ca796f4c1
  Author: Paul Kirth <paulkirth at google.com>
  Date:   2024-07-31 (Wed, 31 Jul 2024)

  Changed paths:
    M libcxx/include/__mutex/unique_lock.h
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/implicit_ctad.pass.cpp
    R libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/copy_assign.compile.fail.cpp
    A libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/copy_assign.compile.pass.cpp
    R libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/copy_ctor.compile.fail.cpp
    A libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/copy_ctor.compile.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/default.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/move_assign.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/move_ctor.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/mutex_adopt_lock.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/mutex_defer_lock.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/lock.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/try_lock.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/try_lock_for.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/try_lock_until.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/unlock.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.mod/member_swap.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.mod/nonmember_swap.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.mod/release.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.obs/mutex.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.obs/op_bool.pass.cpp
    M libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.obs/owns_lock.pass.cpp
    A libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/types.compile.pass.cpp
    A libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/types.h
    R libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/types.pass.cpp

  Log Message:
  -----------
  [libc++] Make std::unique_lock available with _LIBCPP_HAS_NO_THREADS (#99562)

This is a follow up to https://github.com/llvm/llvm-project/pull/98717,
which made lock_guard available under _LIBCPP_HAS_NO_THREADS. We can
make unique_lock available under similar circumstances. This patch
follows the example in #98717, by:

  - Removing the preprocessor guards for _LIBCPP_HAS_NO_THREADS in the
    unique_lock header.
  - providing a set of custom mutex implementations in a local header.
  - using custom locks in tests that can be made to work under
    `no-threads`.



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