lib/std/Io/Threaded.zig         | 402 ++++++++++++++++++++------------
 lib/std/fs/test.zig             |   2 +-
 lib/std/os/windows.zig          |  15 +-
 lib/std/os/windows/kernel32.zig |   2 +-
 lib/std/os/windows/test.zig     |   6 +-
 lib/std/process/Args.zig        |  21 +-
 lib/std/process/Environ.zig     | 104 +++++----
 7 files changed, 336 insertions(+), 216 deletions(-)