writeIpc

fn writeIpc(writer: *Io.Writer, serialized: Serialized) Io.Writer.Error!void {
    // Byteswap if necessary to ensure little endian over the pipe. This is
    // needed because the parent or child process might be running in qemu.
    if (is_big_endian) for (serialized.storage) |*s| s.byteSwap();

    assert(serialized.parents.len == serialized.storage.len);
    const serialized_len: u8 = @intCast(serialized.parents.len);
    const header = std.mem.asBytes(&serialized_len);
    const storage = std.mem.sliceAsBytes(serialized.storage);
    const parents = std.mem.sliceAsBytes(serialized.parents);

    var vec = [3][]const u8{ header, storage, parents };
    try writer.writeVecAll(&vec);
}