lib/std/Io.zig            |  95 ++++++++++--
 lib/std/Io/File.zig       |   5 +-
 lib/std/Io/Threaded.zig   | 256 +++++++++++++++++++++-----------
 lib/std/process.zig       |  16 +-
 lib/std/process/Child.zig |  92 ++++++------
 5 files changed, 312 insertions(+), 152 deletions(-)