lib/std/Io/File.zig          | 18 ++++++++
 lib/std/Io/Threaded.zig      | 71 +++++++++++++++++++++++---------
 lib/std/Io/Threaded/test.zig |  4 +-
 lib/std/Progress.zig         |  1 +
 lib/std/posix/test.zig       |  9 ++--
 5 files changed, 79 insertions(+), 24 deletions(-)