Update for latest nightly 2018-06-09 (#70)

* Update for latest nightly 2018-06-09
* We now have a proper horizon os and sys modules in libstd

7 files changed, 1087 insertions, 0 deletions

diff --git a/ctr-std/src/sys/windows/ext/ffi.rs b/ctr-std/src/sys/windows/ext/ffi.rs
new file mode 100644
index 0000000..98d4355
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/ffi.rs
@@ -0,0 +1,151 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Windows-specific extensions to the primitives in the `std::ffi` module.
+//!
+//! # Overview
+//!
+//! For historical reasons, the Windows API uses a form of potentially
+//! ill-formed UTF-16 encoding for strings.  Specifically, the 16-bit
+//! code units in Windows strings may contain [isolated surrogate code
+//! points which are not paired together][ill-formed-utf-16].  The
+//! Unicode standard requires that surrogate code points (those in the
+//! range U+D800 to U+DFFF) always be *paired*, because in the UTF-16
+//! encoding a *surrogate code unit pair* is used to encode a single
+//! character.  For compatibility with code that does not enforce
+//! these pairings, Windows does not enforce them, either.
+//!
+//! While it is not always possible to convert such a string losslessly into
+//! a valid UTF-16 string (or even UTF-8), it is often desirable to be
+//! able to round-trip such a string from and to Windows APIs
+//! losslessly.  For example, some Rust code may be "bridging" some
+//! Windows APIs together, just passing `WCHAR` strings among those
+//! APIs without ever really looking into the strings.
+//!
+//! If Rust code *does* need to look into those strings, it can
+//! convert them to valid UTF-8, possibly lossily, by substituting
+//! invalid sequences with U+FFFD REPLACEMENT CHARACTER, as is
+//! conventionally done in other Rust APIs that deal with string
+//! encodings.
+//!
+//! # `OsStringExt` and `OsStrExt`
+//!
+//! [`OsString`] is the Rust wrapper for owned strings in the
+//! preferred representation of the operating system.  On Windows,
+//! this struct gets augmented with an implementation of the
+//! [`OsStringExt`] trait, which has a [`from_wide`] method.  This
+//! lets you create an [`OsString`] from a `&[u16]` slice; presumably
+//! you get such a slice out of a `WCHAR` Windows API.
+//!
+//! Similarly, [`OsStr`] is the Rust wrapper for borrowed strings from
+//! preferred representation of the operating system.  On Windows, the
+//! [`OsStrExt`] trait provides the [`encode_wide`] method, which
+//! outputs an [`EncodeWide`] iterator.  You can [`collect`] this
+//! iterator, for example, to obtain a `Vec<u16>`; you can later get a
+//! pointer to this vector's contents and feed it to Windows APIs.
+//!
+//! These traits, along with [`OsString`] and [`OsStr`], work in
+//! conjunction so that it is possible to **round-trip** strings from
+//! Windows and back, with no loss of data, even if the strings are
+//! ill-formed UTF-16.
+//!
+//! [ill-formed-utf-16]: https://simonsapin.github.io/wtf-8/#ill-formed-utf-16
+//! [`OsString`]: ../../../ffi/struct.OsString.html
+//! [`OsStr`]: ../../../ffi/struct.OsStr.html
+//! [`OsStringExt`]: trait.OsStringExt.html
+//! [`OsStrExt`]: trait.OsStrExt.html
+//! [`EncodeWide`]: struct.EncodeWide.html
+//! [`from_wide`]: trait.OsStringExt.html#tymethod.from_wide
+//! [`encode_wide`]: trait.OsStrExt.html#tymethod.encode_wide
+//! [`collect`]: ../../../iter/trait.Iterator.html#method.collect
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+use ffi::{OsString, OsStr};
+use sys::os_str::Buf;
+use sys_common::wtf8::Wtf8Buf;
+use sys_common::{FromInner, AsInner};
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use sys_common::wtf8::EncodeWide;
+
+/// Windows-specific extensions to [`OsString`].
+///
+/// [`OsString`]: ../../../../std/ffi/struct.OsString.html
+#[stable(feature = "rust1", since = "1.0.0")]
+pub trait OsStringExt {
+    /// Creates an `OsString` from a potentially ill-formed UTF-16 slice of
+    /// 16-bit code units.
+    ///
+    /// This is lossless: calling [`encode_wide`] on the resulting string
+    /// will always return the original code units.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::ffi::OsString;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// // UTF-16 encoding for "Unicode".
+    /// let source = [0x0055, 0x006E, 0x0069, 0x0063, 0x006F, 0x0064, 0x0065];
+    ///
+    /// let string = OsString::from_wide(&source[..]);
+    /// ```
+    ///
+    /// [`encode_wide`]: ./trait.OsStrExt.html#tymethod.encode_wide
+    #[stable(feature = "rust1", since = "1.0.0")]
+    fn from_wide(wide: &[u16]) -> Self;
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl OsStringExt for OsString {
+    fn from_wide(wide: &[u16]) -> OsString {
+        FromInner::from_inner(Buf { inner: Wtf8Buf::from_wide(wide) })
+    }
+}
+
+/// Windows-specific extensions to [`OsStr`].
+///
+/// [`OsStr`]: ../../../../std/ffi/struct.OsStr.html
+#[stable(feature = "rust1", since = "1.0.0")]
+pub trait OsStrExt {
+    /// Re-encodes an `OsStr` as a wide character sequence, i.e. potentially
+    /// ill-formed UTF-16.
+    ///
+    /// This is lossless: calling [`OsString::from_wide`] and then
+    /// `encode_wide` on the result will yield the original code units.
+    /// Note that the encoding does not add a final null terminator.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::ffi::OsString;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// // UTF-16 encoding for "Unicode".
+    /// let source = [0x0055, 0x006E, 0x0069, 0x0063, 0x006F, 0x0064, 0x0065];
+    ///
+    /// let string = OsString::from_wide(&source[..]);
+    ///
+    /// let result: Vec<u16> = string.encode_wide().collect();
+    /// assert_eq!(&source[..], &result[..]);
+    /// ```
+    ///
+    /// [`OsString::from_wide`]: ./trait.OsStringExt.html#tymethod.from_wide
+    #[stable(feature = "rust1", since = "1.0.0")]
+    fn encode_wide(&self) -> EncodeWide;
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl OsStrExt for OsStr {
+    fn encode_wide(&self) -> EncodeWide {
+        self.as_inner().inner.encode_wide()
+    }
+}
diff --git a/ctr-std/src/sys/windows/ext/fs.rs b/ctr-std/src/sys/windows/ext/fs.rs
new file mode 100644
index 0000000..78c9e95
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/fs.rs
@@ -0,0 +1,508 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Windows-specific extensions for the primitives in the `std::fs` module.
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+use fs::{self, OpenOptions, Metadata};
+use io;
+use path::Path;
+use sys;
+use sys_common::{AsInnerMut, AsInner};
+
+/// Windows-specific extensions to [`File`].
+///
+/// [`File`]: ../../../fs/struct.File.html
+#[stable(feature = "file_offset", since = "1.15.0")]
+pub trait FileExt {
+    /// Seeks to a given position and reads a number of bytes.
+    ///
+    /// Returns the number of bytes read.
+    ///
+    /// The offset is relative to the start of the file and thus independent
+    /// from the current cursor. The current cursor **is** affected by this
+    /// function, it is set to the end of the read.
+    ///
+    /// Reading beyond the end of the file will always return with a length of
+    /// 0\.
+    ///
+    /// Note that similar to `File::read`, it is not an error to return with a
+    /// short read. When returning from such a short read, the file pointer is
+    /// still updated.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs::File;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let mut file = File::open("foo.txt")?;
+    ///     let mut buffer = [0; 10];
+    ///
+    ///     // Read 10 bytes, starting 72 bytes from the
+    ///     // start of the file.
+    ///     file.seek_read(&mut buffer[..], 72)?;
+    ///     Ok(())
+    /// }
+    /// ```
+    #[stable(feature = "file_offset", since = "1.15.0")]
+    fn seek_read(&self, buf: &mut [u8], offset: u64) -> io::Result<usize>;
+
+    /// Seeks to a given position and writes a number of bytes.
+    ///
+    /// Returns the number of bytes written.
+    ///
+    /// The offset is relative to the start of the file and thus independent
+    /// from the current cursor. The current cursor **is** affected by this
+    /// function, it is set to the end of the write.
+    ///
+    /// When writing beyond the end of the file, the file is appropriately
+    /// extended and the intermediate bytes are left uninitialized.
+    ///
+    /// Note that similar to `File::write`, it is not an error to return a
+    /// short write. When returning from such a short write, the file pointer
+    /// is still updated.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::fs::File;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> std::io::Result<()> {
+    ///     let mut buffer = File::create("foo.txt")?;
+    ///
+    ///     // Write a byte string starting 72 bytes from
+    ///     // the start of the file.
+    ///     buffer.seek_write(b"some bytes", 72)?;
+    ///     Ok(())
+    /// }
+    /// ```
+    #[stable(feature = "file_offset", since = "1.15.0")]
+    fn seek_write(&self, buf: &[u8], offset: u64) -> io::Result<usize>;
+}
+
+#[stable(feature = "file_offset", since = "1.15.0")]
+impl FileExt for fs::File {
+    fn seek_read(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
+        self.as_inner().read_at(buf, offset)
+    }
+
+    fn seek_write(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
+        self.as_inner().write_at(buf, offset)
+    }
+}
+
+/// Windows-specific extensions to [`fs::OpenOptions`].
+///
+/// [`fs::OpenOptions`]: ../../../../std/fs/struct.OpenOptions.html
+#[stable(feature = "open_options_ext", since = "1.10.0")]
+pub trait OpenOptionsExt {
+    /// Overrides the `dwDesiredAccess` argument to the call to [`CreateFile`]
+    /// with the specified value.
+    ///
+    /// This will override the `read`, `write`, and `append` flags on the
+    /// `OpenOptions` structure. This method provides fine-grained control over
+    /// the permissions to read, write and append data, attributes (like hidden
+    /// and system), and extended attributes.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::fs::OpenOptions;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// // Open without read and write permission, for example if you only need
+    /// // to call `stat` on the file
+    /// let file = OpenOptions::new().access_mode(0).open("foo.txt");
+    /// ```
+    ///
+    /// [`CreateFile`]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx
+    #[stable(feature = "open_options_ext", since = "1.10.0")]
+    fn access_mode(&mut self, access: u32) -> &mut Self;
+
+    /// Overrides the `dwShareMode` argument to the call to [`CreateFile`] with
+    /// the specified value.
+    ///
+    /// By default `share_mode` is set to
+    /// `FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE`. This allows
+    /// other processes to to read, write, and delete/rename the same file
+    /// while it is open. Removing any of the flags will prevent other
+    /// processes from performing the corresponding operation until the file
+    /// handle is closed.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::fs::OpenOptions;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// // Do not allow others to read or modify this file while we have it open
+    /// // for writing.
+    /// let file = OpenOptions::new()
+    ///     .write(true)
+    ///     .share_mode(0)
+    ///     .open("foo.txt");
+    /// ```
+    ///
+    /// [`CreateFile`]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx
+    #[stable(feature = "open_options_ext", since = "1.10.0")]
+    fn share_mode(&mut self, val: u32) -> &mut Self;
+
+    /// Sets extra flags for the `dwFileFlags` argument to the call to
+    /// [`CreateFile2`] to the specified value (or combines it with
+    /// `attributes` and `security_qos_flags` to set the `dwFlagsAndAttributes`
+    /// for [`CreateFile`]).
+    ///
+    /// Custom flags can only set flags, not remove flags set by Rust's options.
+    /// This option overwrites any previously set custom flags.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # #[cfg(for_demonstration_only)]
+    /// extern crate winapi;
+    /// # mod winapi { pub const FILE_FLAG_DELETE_ON_CLOSE: u32 = 0x04000000; }
+    ///
+    /// use std::fs::OpenOptions;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// let file = OpenOptions::new()
+    ///     .create(true)
+    ///     .write(true)
+    ///     .custom_flags(winapi::FILE_FLAG_DELETE_ON_CLOSE)
+    ///     .open("foo.txt");
+    /// ```
+    ///
+    /// [`CreateFile`]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx
+    /// [`CreateFile2`]: https://msdn.microsoft.com/en-us/library/windows/desktop/hh449422.aspx
+    #[stable(feature = "open_options_ext", since = "1.10.0")]
+    fn custom_flags(&mut self, flags: u32) -> &mut Self;
+
+    /// Sets the `dwFileAttributes` argument to the call to [`CreateFile2`] to
+    /// the specified value (or combines it with `custom_flags` and
+    /// `security_qos_flags` to set the `dwFlagsAndAttributes` for
+    /// [`CreateFile`]).
+    ///
+    /// If a _new_ file is created because it does not yet exist and
+    /// `.create(true)` or `.create_new(true)` are specified, the new file is
+    /// given the attributes declared with `.attributes()`.
+    ///
+    /// If an _existing_ file is opened with `.create(true).truncate(true)`, its
+    /// existing attributes are preserved and combined with the ones declared
+    /// with `.attributes()`.
+    ///
+    /// In all other cases the attributes get ignored.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # #[cfg(for_demonstration_only)]
+    /// extern crate winapi;
+    /// # mod winapi { pub const FILE_ATTRIBUTE_HIDDEN: u32 = 2; }
+    ///
+    /// use std::fs::OpenOptions;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// let file = OpenOptions::new()
+    ///     .write(true)
+    ///     .create(true)
+    ///     .attributes(winapi::FILE_ATTRIBUTE_HIDDEN)
+    ///     .open("foo.txt");
+    /// ```
+    ///
+    /// [`CreateFile`]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx
+    /// [`CreateFile2`]: https://msdn.microsoft.com/en-us/library/windows/desktop/hh449422.aspx
+    #[stable(feature = "open_options_ext", since = "1.10.0")]
+    fn attributes(&mut self, val: u32) -> &mut Self;
+
+    /// Sets the `dwSecurityQosFlags` argument to the call to [`CreateFile2`] to
+    /// the specified value (or combines it with `custom_flags` and `attributes`
+    /// to set the `dwFlagsAndAttributes` for [`CreateFile`]).
+    ///
+    /// By default, `security_qos_flags` is set to `SECURITY_ANONYMOUS`. For
+    /// information about possible values, see [Impersonation Levels] on the
+    /// Windows Dev Center site.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::fs::OpenOptions;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// let file = OpenOptions::new()
+    ///     .write(true)
+    ///     .create(true)
+    ///
+    ///     // Sets the flag value to `SecurityIdentification`.
+    ///     .security_qos_flags(1)
+    ///
+    ///     .open("foo.txt");
+    /// ```
+    ///
+    /// [`CreateFile`]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx
+    /// [`CreateFile2`]: https://msdn.microsoft.com/en-us/library/windows/desktop/hh449422.aspx
+    /// [Impersonation Levels]:
+    ///     https://msdn.microsoft.com/en-us/library/windows/desktop/aa379572.aspx
+    #[stable(feature = "open_options_ext", since = "1.10.0")]
+    fn security_qos_flags(&mut self, flags: u32) -> &mut OpenOptions;
+}
+
+#[stable(feature = "open_options_ext", since = "1.10.0")]
+impl OpenOptionsExt for OpenOptions {
+    fn access_mode(&mut self, access: u32) -> &mut OpenOptions {
+        self.as_inner_mut().access_mode(access); self
+    }
+
+    fn share_mode(&mut self, share: u32) -> &mut OpenOptions {
+        self.as_inner_mut().share_mode(share); self
+    }
+
+    fn custom_flags(&mut self, flags: u32) -> &mut OpenOptions {
+        self.as_inner_mut().custom_flags(flags); self
+    }
+
+    fn attributes(&mut self, attributes: u32) -> &mut OpenOptions {
+        self.as_inner_mut().attributes(attributes); self
+    }
+
+    fn security_qos_flags(&mut self, flags: u32) -> &mut OpenOptions {
+        self.as_inner_mut().security_qos_flags(flags); self
+    }
+}
+
+/// Windows-specific extensions to [`fs::Metadata`].
+///
+/// The data members that this trait exposes correspond to the members
+/// of the [`BY_HANDLE_FILE_INFORMATION`] structure.
+///
+/// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
+/// [`BY_HANDLE_FILE_INFORMATION`]:
+///     https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788.aspx
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+pub trait MetadataExt {
+    /// Returns the value of the `dwFileAttributes` field of this metadata.
+    ///
+    /// This field contains the file system attribute information for a file
+    /// or directory. For possible values and their descriptions, see
+    /// [File Attribute Constants] in the Windows Dev Center.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let metadata = fs::metadata("foo.txt")?;
+    ///     let attributes = metadata.file_attributes();
+    ///     Ok(())
+    /// }
+    /// ```
+    ///
+    /// [File Attribute Constants]:
+    ///     https://msdn.microsoft.com/en-us/library/windows/desktop/gg258117.aspx
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    fn file_attributes(&self) -> u32;
+
+    /// Returns the value of the `ftCreationTime` field of this metadata.
+    ///
+    /// The returned 64-bit value is equivalent to a [`FILETIME`] struct,
+    /// which represents the number of 100-nanosecond intervals since
+    /// January 1, 1601 (UTC). The struct is automatically
+    /// converted to a `u64` value, as that is the recommended way
+    /// to use it.
+    ///
+    /// If the underlying filesystem does not support creation time, the
+    /// returned value is 0.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let metadata = fs::metadata("foo.txt")?;
+    ///     let creation_time = metadata.creation_time();
+    ///     Ok(())
+    /// }
+    /// ```
+    ///
+    /// [`FILETIME`]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms724284.aspx
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    fn creation_time(&self) -> u64;
+
+    /// Returns the value of the `ftLastAccessTime` field of this metadata.
+    ///
+    /// The returned 64-bit value is equivalent to a [`FILETIME`] struct,
+    /// which represents the number of 100-nanosecond intervals since
+    /// January 1, 1601 (UTC). The struct is automatically
+    /// converted to a `u64` value, as that is the recommended way
+    /// to use it.
+    ///
+    /// For a file, the value specifies the last time that a file was read
+    /// from or written to. For a directory, the value specifies when
+    /// the directory was created. For both files and directories, the
+    /// specified date is correct, but the time of day is always set to
+    /// midnight.
+    ///
+    /// If the underlying filesystem does not support last access time, the
+    /// returned value is 0.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let metadata = fs::metadata("foo.txt")?;
+    ///     let last_access_time = metadata.last_access_time();
+    ///     Ok(())
+    /// }
+    /// ```
+    ///
+    /// [`FILETIME`]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms724284.aspx
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    fn last_access_time(&self) -> u64;
+
+    /// Returns the value of the `ftLastWriteTime` field of this metadata.
+    ///
+    /// The returned 64-bit value is equivalent to a [`FILETIME`] struct,
+    /// which represents the number of 100-nanosecond intervals since
+    /// January 1, 1601 (UTC). The struct is automatically
+    /// converted to a `u64` value, as that is the recommended way
+    /// to use it.
+    ///
+    /// For a file, the value specifies the last time that a file was written
+    /// to. For a directory, the structure specifies when the directory was
+    /// created.
+    ///
+    /// If the underlying filesystem does not support the last write time,
+    /// the returned value is 0.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let metadata = fs::metadata("foo.txt")?;
+    ///     let last_write_time = metadata.last_write_time();
+    ///     Ok(())
+    /// }
+    /// ```
+    ///
+    /// [`FILETIME`]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms724284.aspx
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    fn last_write_time(&self) -> u64;
+
+    /// Returns the value of the `nFileSize{High,Low}` fields of this
+    /// metadata.
+    ///
+    /// The returned value does not have meaning for directories.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use std::io;
+    /// use std::fs;
+    /// use std::os::windows::prelude::*;
+    ///
+    /// fn main() -> io::Result<()> {
+    ///     let metadata = fs::metadata("foo.txt")?;
+    ///     let file_size = metadata.file_size();
+    ///     Ok(())
+    /// }
+    /// ```
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    fn file_size(&self) -> u64;
+}
+
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+impl MetadataExt for Metadata {
+    fn file_attributes(&self) -> u32 { self.as_inner().attrs() }
+    fn creation_time(&self) -> u64 { self.as_inner().created_u64() }
+    fn last_access_time(&self) -> u64 { self.as_inner().accessed_u64() }
+    fn last_write_time(&self) -> u64 { self.as_inner().modified_u64() }
+    fn file_size(&self) -> u64 { self.as_inner().size() }
+}
+
+/// Windows-specific extensions to [`FileType`].
+///
+/// On Windows, a symbolic link knows whether it is a file or directory.
+///
+/// [`FileType`]: ../../../../std/fs/struct.FileType.html
+#[unstable(feature = "windows_file_type_ext", issue = "0")]
+pub trait FileTypeExt {
+    /// Returns whether this file type is a symbolic link that is also a directory.
+    #[unstable(feature = "windows_file_type_ext", issue = "0")]
+    fn is_symlink_dir(&self) -> bool;
+    /// Returns whether this file type is a symbolic link that is also a file.
+    #[unstable(feature = "windows_file_type_ext", issue = "0")]
+    fn is_symlink_file(&self) -> bool;
+}
+
+#[unstable(feature = "windows_file_type_ext", issue = "0")]
+impl FileTypeExt for fs::FileType {
+    fn is_symlink_dir(&self) -> bool { self.as_inner().is_symlink_dir() }
+    fn is_symlink_file(&self) -> bool { self.as_inner().is_symlink_file() }
+}
+
+/// Creates a new file symbolic link on the filesystem.
+///
+/// The `dst` path will be a file symbolic link pointing to the `src`
+/// path.
+///
+/// # Examples
+///
+/// ```no_run
+/// use std::os::windows::fs;
+///
+/// fn main() -> std::io::Result<()> {
+///     fs::symlink_file("a.txt", "b.txt")?;
+///     Ok(())
+/// }
+/// ```
+#[stable(feature = "symlink", since = "1.1.0")]
+pub fn symlink_file<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q)
+                                                    -> io::Result<()> {
+    sys::fs::symlink_inner(src.as_ref(), dst.as_ref(), false)
+}
+
+/// Creates a new directory symlink on the filesystem.
+///
+/// The `dst` path will be a directory symbolic link pointing to the `src`
+/// path.
+///
+/// # Examples
+///
+/// ```no_run
+/// use std::os::windows::fs;
+///
+/// fn main() -> std::io::Result<()> {
+///     fs::symlink_dir("a", "b")?;
+///     Ok(())
+/// }
+/// ```
+#[stable(feature = "symlink", since = "1.1.0")]
+pub fn symlink_dir<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q)
+                                                   -> io::Result<()> {
+    sys::fs::symlink_inner(src.as_ref(), dst.as_ref(), true)
+}
diff --git a/ctr-std/src/sys/windows/ext/io.rs b/ctr-std/src/sys/windows/ext/io.rs
new file mode 100644
index 0000000..90128dd
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/io.rs
@@ -0,0 +1,209 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+use fs;
+use os::windows::raw;
+use net;
+use sys_common::{self, AsInner, FromInner, IntoInner};
+use sys;
+use io;
+use sys::c;
+
+/// Raw HANDLEs.
+#[stable(feature = "rust1", since = "1.0.0")]
+pub type RawHandle = raw::HANDLE;
+
+/// Raw SOCKETs.
+#[stable(feature = "rust1", since = "1.0.0")]
+pub type RawSocket = raw::SOCKET;
+
+/// Extract raw handles.
+#[stable(feature = "rust1", since = "1.0.0")]
+pub trait AsRawHandle {
+    /// Extracts the raw handle, without taking any ownership.
+    #[stable(feature = "rust1", since = "1.0.0")]
+    fn as_raw_handle(&self) -> RawHandle;
+}
+
+/// Construct I/O objects from raw handles.
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+pub trait FromRawHandle {
+    /// Constructs a new I/O object from the specified raw handle.
+    ///
+    /// This function will **consume ownership** of the handle given,
+    /// passing responsibility for closing the handle to the returned
+    /// object.
+    ///
+    /// This function is also unsafe as the primitives currently returned
+    /// have the contract that they are the sole owner of the file
+    /// descriptor they are wrapping. Usage of this function could
+    /// accidentally allow violating this contract which can cause memory
+    /// unsafety in code that relies on it being true.
+    #[stable(feature = "from_raw_os", since = "1.1.0")]
+    unsafe fn from_raw_handle(handle: RawHandle) -> Self;
+}
+
+/// A trait to express the ability to consume an object and acquire ownership of
+/// its raw `HANDLE`.
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+pub trait IntoRawHandle {
+    /// Consumes this object, returning the raw underlying handle.
+    ///
+    /// This function **transfers ownership** of the underlying handle to the
+    /// caller. Callers are then the unique owners of the handle and must close
+    /// it once it's no longer needed.
+    #[stable(feature = "into_raw_os", since = "1.4.0")]
+    fn into_raw_handle(self) -> RawHandle;
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl AsRawHandle for fs::File {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as RawHandle
+    }
+}
+
+#[stable(feature = "asraw_stdio", since = "1.21.0")]
+impl AsRawHandle for io::Stdin {
+    fn as_raw_handle(&self) -> RawHandle {
+        unsafe { c::GetStdHandle(c::STD_INPUT_HANDLE) as RawHandle }
+    }
+}
+
+#[stable(feature = "asraw_stdio", since = "1.21.0")]
+impl AsRawHandle for io::Stdout {
+    fn as_raw_handle(&self) -> RawHandle {
+        unsafe { c::GetStdHandle(c::STD_OUTPUT_HANDLE) as RawHandle }
+    }
+}
+
+#[stable(feature = "asraw_stdio", since = "1.21.0")]
+impl AsRawHandle for io::Stderr {
+    fn as_raw_handle(&self) -> RawHandle {
+        unsafe { c::GetStdHandle(c::STD_ERROR_HANDLE) as RawHandle }
+    }
+}
+
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+impl FromRawHandle for fs::File {
+    unsafe fn from_raw_handle(handle: RawHandle) -> fs::File {
+        let handle = handle as c::HANDLE;
+        fs::File::from_inner(sys::fs::File::from_inner(handle))
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawHandle for fs::File {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
+
+/// Extract raw sockets.
+#[stable(feature = "rust1", since = "1.0.0")]
+pub trait AsRawSocket {
+    /// Extracts the underlying raw socket from this object.
+    #[stable(feature = "rust1", since = "1.0.0")]
+    fn as_raw_socket(&self) -> RawSocket;
+}
+
+/// Create I/O objects from raw sockets.
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+pub trait FromRawSocket {
+    /// Creates a new I/O object from the given raw socket.
+    ///
+    /// This function will **consume ownership** of the socket provided and
+    /// it will be closed when the returned object goes out of scope.
+    ///
+    /// This function is also unsafe as the primitives currently returned
+    /// have the contract that they are the sole owner of the file
+    /// descriptor they are wrapping. Usage of this function could
+    /// accidentally allow violating this contract which can cause memory
+    /// unsafety in code that relies on it being true.
+    #[stable(feature = "from_raw_os", since = "1.1.0")]
+    unsafe fn from_raw_socket(sock: RawSocket) -> Self;
+}
+
+/// A trait to express the ability to consume an object and acquire ownership of
+/// its raw `SOCKET`.
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+pub trait IntoRawSocket {
+    /// Consumes this object, returning the raw underlying socket.
+    ///
+    /// This function **transfers ownership** of the underlying socket to the
+    /// caller. Callers are then the unique owners of the socket and must close
+    /// it once it's no longer needed.
+    #[stable(feature = "into_raw_os", since = "1.4.0")]
+    fn into_raw_socket(self) -> RawSocket;
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl AsRawSocket for net::TcpStream {
+    fn as_raw_socket(&self) -> RawSocket {
+        *self.as_inner().socket().as_inner()
+    }
+}
+#[stable(feature = "rust1", since = "1.0.0")]
+impl AsRawSocket for net::TcpListener {
+    fn as_raw_socket(&self) -> RawSocket {
+        *self.as_inner().socket().as_inner()
+    }
+}
+#[stable(feature = "rust1", since = "1.0.0")]
+impl AsRawSocket for net::UdpSocket {
+    fn as_raw_socket(&self) -> RawSocket {
+        *self.as_inner().socket().as_inner()
+    }
+}
+
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+impl FromRawSocket for net::TcpStream {
+    unsafe fn from_raw_socket(sock: RawSocket) -> net::TcpStream {
+        let sock = sys::net::Socket::from_inner(sock);
+        net::TcpStream::from_inner(sys_common::net::TcpStream::from_inner(sock))
+    }
+}
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+impl FromRawSocket for net::TcpListener {
+    unsafe fn from_raw_socket(sock: RawSocket) -> net::TcpListener {
+        let sock = sys::net::Socket::from_inner(sock);
+        net::TcpListener::from_inner(sys_common::net::TcpListener::from_inner(sock))
+    }
+}
+#[stable(feature = "from_raw_os", since = "1.1.0")]
+impl FromRawSocket for net::UdpSocket {
+    unsafe fn from_raw_socket(sock: RawSocket) -> net::UdpSocket {
+        let sock = sys::net::Socket::from_inner(sock);
+        net::UdpSocket::from_inner(sys_common::net::UdpSocket::from_inner(sock))
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawSocket for net::TcpStream {
+    fn into_raw_socket(self) -> RawSocket {
+        self.into_inner().into_socket().into_inner()
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawSocket for net::TcpListener {
+    fn into_raw_socket(self) -> RawSocket {
+        self.into_inner().into_socket().into_inner()
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawSocket for net::UdpSocket {
+    fn into_raw_socket(self) -> RawSocket {
+        self.into_inner().into_socket().into_inner()
+    }
+}
diff --git a/ctr-std/src/sys/windows/ext/mod.rs b/ctr-std/src/sys/windows/ext/mod.rs
new file mode 100644
index 0000000..4b458d2
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/mod.rs
@@ -0,0 +1,44 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Platform-specific extensions to `std` for Windows.
+//!
+//! Provides access to platform-level information for Windows, and exposes
+//! Windows-specific idioms that would otherwise be inappropriate as part
+//! the core `std` library. These extensions allow developers to use
+//! `std` types and idioms with Windows in a way that the normal
+//! platform-agnostic idioms would not normally support.
+
+#![stable(feature = "rust1", since = "1.0.0")]
+#![doc(cfg(windows))]
+
+pub mod ffi;
+pub mod fs;
+pub mod io;
+pub mod raw;
+pub mod process;
+pub mod thread;
+
+/// A prelude for conveniently writing platform-specific code.
+///
+/// Includes all extension traits, and some important type definitions.
+#[stable(feature = "rust1", since = "1.0.0")]
+pub mod prelude {
+    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::io::{RawSocket, RawHandle, AsRawSocket, AsRawHandle};
+    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::io::{FromRawSocket, FromRawHandle, IntoRawSocket, IntoRawHandle};
+    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::ffi::{OsStrExt, OsStringExt};
+    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::fs::{OpenOptionsExt, MetadataExt};
+    #[doc(no_inline)] #[stable(feature = "file_offset", since = "1.15.0")]
+    pub use super::fs::FileExt;
+}
diff --git a/ctr-std/src/sys/windows/ext/process.rs b/ctr-std/src/sys/windows/ext/process.rs
new file mode 100644
index 0000000..a02bcbe
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/process.rs
@@ -0,0 +1,123 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Extensions to `std::process` for Windows.
+
+#![stable(feature = "process_extensions", since = "1.2.0")]
+
+use os::windows::io::{FromRawHandle, RawHandle, AsRawHandle, IntoRawHandle};
+use process;
+use sys;
+use sys_common::{AsInnerMut, AsInner, FromInner, IntoInner};
+
+#[stable(feature = "process_extensions", since = "1.2.0")]
+impl FromRawHandle for process::Stdio {
+    unsafe fn from_raw_handle(handle: RawHandle) -> process::Stdio {
+        let handle = sys::handle::Handle::new(handle as *mut _);
+        let io = sys::process::Stdio::Handle(handle);
+        process::Stdio::from_inner(io)
+    }
+}
+
+#[stable(feature = "process_extensions", since = "1.2.0")]
+impl AsRawHandle for process::Child {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawHandle for process::Child {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
+
+#[stable(feature = "process_extensions", since = "1.2.0")]
+impl AsRawHandle for process::ChildStdin {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+#[stable(feature = "process_extensions", since = "1.2.0")]
+impl AsRawHandle for process::ChildStdout {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+#[stable(feature = "process_extensions", since = "1.2.0")]
+impl AsRawHandle for process::ChildStderr {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawHandle for process::ChildStdin {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawHandle for process::ChildStdout {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
+
+#[stable(feature = "into_raw_os", since = "1.4.0")]
+impl IntoRawHandle for process::ChildStderr {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
+
+/// Windows-specific extensions to [`process::ExitStatus`].
+///
+/// [`process::ExitStatus`]: ../../../../std/process/struct.ExitStatus.html
+#[stable(feature = "exit_status_from", since = "1.12.0")]
+pub trait ExitStatusExt {
+    /// Creates a new `ExitStatus` from the raw underlying `u32` return value of
+    /// a process.
+    #[stable(feature = "exit_status_from", since = "1.12.0")]
+    fn from_raw(raw: u32) -> Self;
+}
+
+#[stable(feature = "exit_status_from", since = "1.12.0")]
+impl ExitStatusExt for process::ExitStatus {
+    fn from_raw(raw: u32) -> Self {
+        process::ExitStatus::from_inner(From::from(raw))
+    }
+}
+
+/// Windows-specific extensions to the [`process::Command`] builder.
+///
+/// [`process::Command`]: ../../../../std/process/struct.Command.html
+#[stable(feature = "windows_process_extensions", since = "1.16.0")]
+pub trait CommandExt {
+    /// Sets the [process creation flags][1] to be passed to `CreateProcess`.
+    ///
+    /// These will always be ORed with `CREATE_UNICODE_ENVIRONMENT`.
+    ///
+    /// [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms684863(v=vs.85).aspx
+    #[stable(feature = "windows_process_extensions", since = "1.16.0")]
+    fn creation_flags(&mut self, flags: u32) -> &mut process::Command;
+}
+
+#[stable(feature = "windows_process_extensions", since = "1.16.0")]
+impl CommandExt for process::Command {
+    fn creation_flags(&mut self, flags: u32) -> &mut process::Command {
+        self.as_inner_mut().creation_flags(flags);
+        self
+    }
+}
diff --git a/ctr-std/src/sys/windows/ext/raw.rs b/ctr-std/src/sys/windows/ext/raw.rs
new file mode 100644
index 0000000..92d53e2
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/raw.rs
@@ -0,0 +1,21 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Windows-specific primitives
+
+#![stable(feature = "raw_ext", since = "1.1.0")]
+
+use os::raw::c_void;
+
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type HANDLE = *mut c_void;
+#[cfg(target_pointer_width = "32")]
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type SOCKET = u32;
+#[cfg(target_pointer_width = "64")]
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type SOCKET = u64;
diff --git a/ctr-std/src/sys/windows/ext/thread.rs b/ctr-std/src/sys/windows/ext/thread.rs
new file mode 100644
index 0000000..36b3a3d
--- /dev/null
+++ b/ctr-std/src/sys/windows/ext/thread.rs
@@ -0,0 +1,31 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Extensions to `std::thread` for Windows.
+
+#![stable(feature = "thread_extensions", since = "1.9.0")]
+
+use os::windows::io::{RawHandle, AsRawHandle, IntoRawHandle};
+use thread;
+use sys_common::{AsInner, IntoInner};
+
+#[stable(feature = "thread_extensions", since = "1.9.0")]
+impl<T> AsRawHandle for thread::JoinHandle<T> {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+#[stable(feature = "thread_extensions", since = "1.9.0")]
+impl<T> IntoRawHandle for thread::JoinHandle<T>  {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}