lib/std/Io/Threaded.zig                 | 422 +++++++++++++++++++++++++-------
 lib/std/Thread.zig                      |   2 +-
 lib/std/debug.zig                       |   6 +-
 lib/std/fs.zig                          |   2 +-
 lib/std/fs/Dir.zig                      |  22 +-
 lib/std/fs/File.zig                     |   2 +-
 lib/std/process/Child.zig               |   2 +-
 test/standalone/child_process/child.zig |  13 +-
 test/standalone/simple/cat/main.zig     |   8 +-
 tools/fetch_them_macos_headers.zig      |  12 +-
 tools/gen_macos_headers_c.zig           |   2 +-
 11 files changed, 375 insertions(+), 118 deletions(-)