Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

14 files changed, 755 insertions, 0 deletions

diff --git a/third_party/rust/iovec/.cargo-checksum.json b/third_party/rust/iovec/.cargo-checksum.json
new file mode 100644
index 0000000000..f32f73927e
--- /dev/null
+++ b/third_party/rust/iovec/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"CHANGELOG.md":"28f825c00e2df6acf0bf80a327ee9f7f7fdec57e4c09072deb6c6ac48ad2c3be","Cargo.toml":"29f5cef61141b8926a4c84769ad2fcf06cf047c260043fe9bcc9c92b9ca4e696","LICENSE-APACHE":"01b5abb4a95cc87b220efbd67a1e99c74bef3d744806dd44b4d57e81db814962","LICENSE-MIT":"d4784f55731ba75b77ad73a52808914b26b2f93b69dd4c03249528a75afbd946","README.md":"247302d4c1dc621f150bc06fc0d37f7ad5a4f2dcf1aafe25f8dfe8eb4fe35921","appveyor.yml":"8c309c2779904317005c7f7404470daf2aad344571168a37da214e37833be2a9","src/lib.rs":"c27782fe0b3d5091d69d6153f8cbf934bcf091612c569127f0ea3bd2058d11e7","src/sys/mod.rs":"b19af7b93fd8d7a6f46234e0bb93ddbb12b175e57eff9cb0c0c195ea89ec56b4","src/sys/unix.rs":"8265b65eee3672c96460f4aae8b7b61179e17c8ca80646be3994bc05951228ae","src/sys/unknown.rs":"5057c208dcb309ec1b46a76b922948358ceb727958fb8bde4908948a3890057d","src/sys/windows.rs":"44abddcddf40a755dfdde6d5c68b972ed8417dc31ba4931d14eeccc32a0bb701","src/unix.rs":"76e76333e31dd53d1ea6704a880f4188014af09fe8be3cecd5239003b2a1fe7c","src/windows.rs":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},"package":"b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"}
\ No newline at end of file
diff --git a/third_party/rust/iovec/CHANGELOG.md b/third_party/rust/iovec/CHANGELOG.md
new file mode 100644
index 0000000000..73d6300a64
--- /dev/null
+++ b/third_party/rust/iovec/CHANGELOG.md
@@ -0,0 +1,19 @@
+# 0.1.4 (October 9, 2019)
+
+* Add missing `repr(C)`.
+
+# 0.1.3 (yanked) (October 8, 2019)
+
+* Remove dependency on old winapi 0.2 (#16)
+
+# 0.1.2 (January 26th, 2018)
+
+* Add support for non-windows/unix targets (#10)
+
+# 0.1.1 (October 5th, 2017)
+
+* Fix soundness bug: Assert slice lengths are always > 0 (#5)
+
+# 0.1.0 (March 14th, 2017)
+
+* Initial release
diff --git a/third_party/rust/iovec/Cargo.toml b/third_party/rust/iovec/Cargo.toml
new file mode 100644
index 0000000000..e950318358
--- /dev/null
+++ b/third_party/rust/iovec/Cargo.toml
@@ -0,0 +1,26 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "iovec"
+version = "0.1.4"
+authors = ["Carl Lerche <me@carllerche.com>"]
+description = "Portable buffer type for scatter/gather I/O operations\n"
+homepage = "https://github.com/carllerche/iovec"
+documentation = "https://docs.rs/iovec"
+readme = "README.md"
+keywords = ["scatter", "gather", "vectored", "io", "networking"]
+categories = ["network-programming", "api-bindings"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/carllerche/iovec"
+[target."cfg(unix)".dependencies.libc]
+version = "0.2"
diff --git a/third_party/rust/iovec/LICENSE-APACHE b/third_party/rust/iovec/LICENSE-APACHE
new file mode 100644
index 0000000000..87d73e7f91
--- /dev/null
+++ b/third_party/rust/iovec/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
+   replaced with your own identifying information. (Don't include
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+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
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+
+Copyright 2017 Carl Lerche
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/third_party/rust/iovec/LICENSE-MIT b/third_party/rust/iovec/LICENSE-MIT
new file mode 100644
index 0000000000..6c296bec80
--- /dev/null
+++ b/third_party/rust/iovec/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2017 Carl Lerche
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/iovec/README.md b/third_party/rust/iovec/README.md
new file mode 100644
index 0000000000..6d2ea7bd73
--- /dev/null
+++ b/third_party/rust/iovec/README.md
@@ -0,0 +1,35 @@
+# IoVec
+
+A specialized byte slice type for performing vectored I/O operations.
+
+[![Crates.io](https://img.shields.io/crates/v/iovec.svg?maxAge=2592000)](https://crates.io/crates/iovec)
+[![Build Status](https://travis-ci.org/carllerche/iovec.svg?branch=master)](https://travis-ci.org/carllerche/iovec)
+
+[Documentation](https://docs.rs/iovec)
+
+## Usage
+
+To use `iovec`, first add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+iovec = "0.1"
+```
+
+Next, add this to your crate:
+
+```rust
+extern crate iovec;
+
+use iovec::IoVec;
+```
+
+For more detail, see [documentation](https://docs.rs/iovec).
+
+# License
+
+`iovec` is primarily distributed under the terms of both the MIT license and the
+Apache License (Version 2.0), with portions covered by various BSD-like
+licenses.
+
+See LICENSE-APACHE, and LICENSE-MIT for details.
diff --git a/third_party/rust/iovec/appveyor.yml b/third_party/rust/iovec/appveyor.yml
new file mode 100644
index 0000000000..4428146b98
--- /dev/null
+++ b/third_party/rust/iovec/appveyor.yml
@@ -0,0 +1,16 @@
+environment:
+  matrix:
+  - TARGET: x86_64-pc-windows-msvc
+
+install:
+  - curl -sSf -o rustup-init.exe https://win.rustup.rs/
+  - rustup-init.exe -y --default-host %TARGET%
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+  - rustc -V
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo build
+  - cargo test
diff --git a/third_party/rust/iovec/src/lib.rs b/third_party/rust/iovec/src/lib.rs
new file mode 100644
index 0000000000..1e091a46c9
--- /dev/null
+++ b/third_party/rust/iovec/src/lib.rs
@@ -0,0 +1,161 @@
+//! A specialized byte slice type for performing vectored I/O operations.
+//!
+//! For more detail, see [`IoVec`] documentation.
+//!
+//! [`IoVec`]: struct.IoVec.html
+
+#[cfg(unix)]
+extern crate libc;
+
+mod sys;
+
+use std::{ops, mem};
+
+#[cfg(unix)]
+pub mod unix;
+
+/// Max length of an `IoVec` slice.
+///
+/// Attempts to convert slices longer than this value will result in a panic.
+pub const MAX_LENGTH: usize = sys::MAX_LENGTH;
+
+/// A specialized byte slice type for performing vectored I/O operations.
+///
+/// On all systems, the types needed to perform vectored I/O systems have the
+/// same size as Rust's [`slice`]. However, the layout is not necessarily the
+/// same. `IoVec` provides a portable compatibility layer.
+///
+/// The `IoVec` behaves like a Rust [`slice`], providing the same functions.
+/// It also provides conversion functions to and from the OS specific vectored
+/// types.
+///
+/// [`slice`]: https://doc.rust-lang.org/std/primitive.slice.html
+///
+/// # Examples
+///
+/// ```
+/// use iovec::IoVec;
+///
+/// let mut data = vec![];
+/// data.extend_from_slice(b"hello");
+///
+/// let iovec: &IoVec = data.as_slice().into();
+///
+/// assert_eq!(&iovec[..], &b"hello"[..]);
+/// ```
+///
+/// # Panics
+///
+/// Attempting to convert a zero-length slice or a slice longer than
+/// [`MAX_LENGTH`] to an `IoVec` will result in a panic.
+///
+/// [`MAX_LENGTH`]: constant.MAX_LENGTH.html
+pub struct IoVec {
+    sys: sys::IoVec,
+}
+
+impl IoVec {
+    pub fn from_bytes(slice: &[u8]) -> Option<&IoVec> {
+        if slice.len() == 0 {
+            return None
+        }
+        unsafe {
+            let iovec: &sys::IoVec = slice.into();
+            Some(mem::transmute(iovec))
+        }
+    }
+
+    pub fn from_bytes_mut(slice: &mut [u8]) -> Option<&mut IoVec> {
+        if slice.len() == 0 {
+            return None
+        }
+        unsafe {
+            let iovec: &mut sys::IoVec = slice.into();
+            Some(mem::transmute(iovec))
+        }
+    }
+
+    #[deprecated(since = "0.1.0", note = "deref instead")]
+    #[doc(hidden)]
+    pub fn as_bytes(&self) -> &[u8] {
+        &**self
+    }
+
+    #[deprecated(since = "0.1.0", note = "deref instead")]
+    #[doc(hidden)]
+    pub fn as_mut_bytes(&mut self) -> &mut [u8] {
+        &mut **self
+    }
+}
+
+impl ops::Deref for IoVec {
+    type Target = [u8];
+
+    fn deref(&self) -> &[u8] {
+        &self.sys.as_ref()
+    }
+}
+
+impl ops::DerefMut for IoVec {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        self.sys.as_mut()
+    }
+}
+
+#[doc(hidden)]
+impl<'a> From<&'a [u8]> for &'a IoVec {
+    fn from(bytes: &'a [u8]) -> &'a IoVec {
+        IoVec::from_bytes(bytes)
+            .expect("this crate accidentally accepted 0-sized slices \
+                     originally but this was since discovered as a soundness \
+                     hole, it's recommended to use the `from_bytes` \
+                     function instead")
+    }
+}
+
+#[doc(hidden)]
+impl<'a> From<&'a mut [u8]> for &'a mut IoVec {
+    fn from(bytes: &'a mut [u8]) -> &'a mut IoVec {
+        IoVec::from_bytes_mut(bytes)
+            .expect("this crate accidentally accepted 0-sized slices \
+                     originally but this was since discovered as a soundness \
+                     hole, it's recommended to use the `from_bytes_mut` \
+                     function instead")
+    }
+}
+
+#[doc(hidden)]
+impl<'a> Default for &'a IoVec {
+    fn default() -> Self {
+        panic!("this implementation was accidentally provided but is \
+                unfortunately unsound, it's recommended to stop using \
+                `IoVec::default` or construct a vector with a nonzero length");
+    }
+}
+
+#[doc(hidden)]
+impl<'a> Default for &'a mut IoVec {
+    fn default() -> Self {
+        panic!("this implementation was accidentally provided but is \
+                unfortunately unsound, it's recommended to stop using \
+                `IoVec::default` or construct a vector with a nonzero length");
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::IoVec;
+
+    #[test]
+    fn convert_ref() {
+        let buf: &IoVec = (&b"hello world"[..]).into();
+        assert_eq!(buf[..], b"hello world"[..]);
+    }
+
+    #[test]
+    fn convert_mut() {
+        let mut buf: Vec<u8> = b"hello world".to_vec();
+        let buf: &mut IoVec = (&mut buf[..]).into();
+        assert_eq!(buf[..], b"hello world"[..]);
+    }
+}
diff --git a/third_party/rust/iovec/src/sys/mod.rs b/third_party/rust/iovec/src/sys/mod.rs
new file mode 100644
index 0000000000..3e0efc99e8
--- /dev/null
+++ b/third_party/rust/iovec/src/sys/mod.rs
@@ -0,0 +1,26 @@
+#[cfg(unix)]
+mod unix;
+
+#[cfg(unix)]
+pub use self::unix::{
+    IoVec,
+    MAX_LENGTH,
+};
+
+#[cfg(windows)]
+mod windows;
+
+#[cfg(windows)]
+pub use self::windows::{
+    IoVec,
+    MAX_LENGTH,
+};
+
+#[cfg(not(any(windows, unix)))]
+mod unknown;
+
+#[cfg(not(any(windows, unix)))]
+pub use self::unknown::{
+    IoVec,
+    MAX_LENGTH,
+};
diff --git a/third_party/rust/iovec/src/sys/unix.rs b/third_party/rust/iovec/src/sys/unix.rs
new file mode 100644
index 0000000000..4dbc0674f8
--- /dev/null
+++ b/third_party/rust/iovec/src/sys/unix.rs
@@ -0,0 +1,52 @@
+use libc;
+use std::{mem, slice, usize};
+
+pub struct IoVec {
+    inner: [u8],
+}
+
+pub const MAX_LENGTH: usize = usize::MAX;
+
+impl IoVec {
+    pub fn as_ref(&self) -> &[u8] {
+        unsafe {
+            let vec = self.iovec();
+            slice::from_raw_parts(vec.iov_base as *const u8, vec.iov_len)
+        }
+    }
+
+    pub fn as_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            let vec = self.iovec();
+            slice::from_raw_parts_mut(vec.iov_base as *mut u8, vec.iov_len)
+        }
+    }
+
+    unsafe fn iovec(&self) -> libc::iovec {
+        mem::transmute(&self.inner)
+    }
+}
+
+impl<'a> From<&'a [u8]> for &'a IoVec {
+    fn from(src: &'a [u8]) -> Self {
+        assert!(src.len() > 0);
+        unsafe {
+            mem::transmute(libc::iovec {
+                iov_base: src.as_ptr() as *mut _,
+                iov_len: src.len(),
+            })
+        }
+    }
+}
+
+impl<'a> From<&'a mut [u8]> for &'a mut IoVec {
+    fn from(src: &'a mut [u8]) -> Self {
+        assert!(src.len() > 0);
+        unsafe {
+            mem::transmute(libc::iovec {
+                iov_base: src.as_ptr() as *mut _,
+                iov_len: src.len(),
+            })
+        }
+    }
+}
diff --git a/third_party/rust/iovec/src/sys/unknown.rs b/third_party/rust/iovec/src/sys/unknown.rs
new file mode 100644
index 0000000000..37acedd78b
--- /dev/null
+++ b/third_party/rust/iovec/src/sys/unknown.rs
@@ -0,0 +1,57 @@
+use std::{mem, slice, usize};
+
+#[derive(Clone)]
+pub struct WasmIoVec {
+    ptr: *const u8,
+    len: usize,
+}
+
+pub struct IoVec {
+    inner: [u8],
+}
+
+pub const MAX_LENGTH: usize = usize::MAX;
+
+impl IoVec {
+    pub fn as_ref(&self) -> &[u8] {
+        unsafe {
+            let vec = self.iovec();
+            slice::from_raw_parts(vec.ptr as *const u8, vec.len)
+        }
+    }
+
+    pub fn as_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            let vec = self.iovec();
+            slice::from_raw_parts_mut(vec.ptr as *mut u8, vec.len)
+        }
+    }
+
+    unsafe fn iovec(&self) -> WasmIoVec {
+        mem::transmute(&self.inner)
+    }
+}
+
+impl<'a> From<&'a [u8]> for &'a IoVec {
+    fn from(src: &'a [u8]) -> Self {
+        assert!(src.len() > 0);
+        unsafe {
+            mem::transmute(WasmIoVec {
+                ptr: src.as_ptr() as *mut _,
+                len: src.len(),
+            })
+        }
+    }
+}
+
+impl<'a> From<&'a mut [u8]> for &'a mut IoVec {
+    fn from(src: &'a mut [u8]) -> Self {
+        assert!(src.len() > 0);
+        unsafe {
+            mem::transmute(WasmIoVec {
+                ptr: src.as_ptr() as *mut _,
+                len: src.len(),
+            })
+        }
+    }
+}
diff --git a/third_party/rust/iovec/src/sys/windows.rs b/third_party/rust/iovec/src/sys/windows.rs
new file mode 100644
index 0000000000..fc5b8fb427
--- /dev/null
+++ b/third_party/rust/iovec/src/sys/windows.rs
@@ -0,0 +1,68 @@
+use std::{mem, slice, u32};
+
+// declare the types we need directly here to avoid bringing
+// in the old and slow winapi 0.2 dependency.
+
+type DWORD = u32;
+type ULONG = u32;
+type CHAR = i8;
+
+#[repr(C)]
+struct WSABUF {
+    pub len: ULONG,
+    pub buf: *mut CHAR,
+}
+
+pub struct IoVec {
+    inner: [u8],
+}
+
+pub const MAX_LENGTH: usize = u32::MAX as usize;
+
+impl IoVec {
+    pub fn as_ref(&self) -> &[u8] {
+        unsafe {
+            let vec = self.wsabuf();
+            slice::from_raw_parts(vec.buf as *const u8, vec.len as usize)
+        }
+    }
+
+    pub fn as_mut(&mut self) -> &mut [u8] {
+        unsafe {
+            let vec = self.wsabuf();
+            slice::from_raw_parts_mut(vec.buf as *mut u8, vec.len as usize)
+        }
+    }
+
+    unsafe fn wsabuf(&self) -> WSABUF {
+        mem::transmute(&self.inner)
+    }
+}
+
+impl<'a> From<&'a [u8]> for &'a IoVec {
+    fn from(src: &'a [u8]) -> Self {
+        assert!(src.len() > 0);
+        assert!(src.len() <= MAX_LENGTH);
+
+        unsafe {
+            mem::transmute(WSABUF {
+                buf: src.as_ptr() as *mut _,
+                len: src.len() as DWORD,
+            })
+        }
+    }
+}
+
+impl<'a> From<&'a mut [u8]> for &'a mut IoVec {
+    fn from(src: &'a mut [u8]) -> Self {
+        assert!(src.len() > 0);
+        assert!(src.len() <= MAX_LENGTH);
+
+        unsafe {
+            mem::transmute(WSABUF {
+                buf: src.as_ptr() as *mut _,
+                len: src.len() as DWORD,
+            })
+        }
+    }
+}
diff --git a/third_party/rust/iovec/src/unix.rs b/third_party/rust/iovec/src/unix.rs
new file mode 100644
index 0000000000..3ef3728bb0
--- /dev/null
+++ b/third_party/rust/iovec/src/unix.rs
@@ -0,0 +1,68 @@
+//! IoVec extensions for Unix platforms.
+//!
+//! These functions provide conversions to unix specific representations of the
+//! vectored data.
+//!
+//! # Examples
+//!
+//! ```
+//! use iovec::IoVec;
+//! use iovec::unix;
+//!
+//! let a = b"hello".to_vec();
+//! let b = b"world".to_vec();
+//!
+//! let bufs: &[&IoVec] = &[(&a[..]).into(), (&b[..]).into()];
+//! let os_bufs = unix::as_os_slice(&bufs[..]);
+//!
+//! // Use the `os_bufs` slice with `writev`.
+//! ```
+
+use IoVec;
+use libc;
+
+use std::mem;
+
+/// Convert a slice of `IoVec` refs to a slice of `libc::iovec`.
+///
+/// The return value can be passed to `writev` bindings.
+///
+/// # Examples
+///
+/// ```
+/// use iovec::IoVec;
+/// use iovec::unix;
+///
+/// let a = b"hello".to_vec();
+/// let b = b"world".to_vec();
+///
+/// let bufs: &[&IoVec] = &[a[..].into(), b[..].into()];
+/// let os_bufs = unix::as_os_slice(bufs);
+///
+/// // Use the `os_bufs` slice with `writev`.
+/// ```
+pub fn as_os_slice<'a>(iov: &'a [&IoVec]) -> &'a [libc::iovec] {
+    unsafe { mem::transmute(iov) }
+}
+
+/// Convert a mutable slice of `IoVec` refs to a mutable slice of `libc::iovec`.
+///
+/// The return value can be passed to `readv` bindings.
+///
+/// # Examples
+///
+/// ```
+/// use iovec::IoVec;
+/// use iovec::unix;
+///
+/// let mut a = [0; 10];
+/// let mut b = [0; 10];
+///
+/// let bufs: &mut [&mut IoVec] = &mut [(&mut a[..]).into(), (&mut b[..]).into()];
+/// let os_bufs = unix::as_os_slice_mut(bufs);
+///
+/// // Use the `os_bufs` slice with `readv`.
+/// ```
+pub fn as_os_slice_mut<'a>(iov: &'a mut [&mut IoVec]) -> &'a mut [libc::iovec] {
+    unsafe { mem::transmute(iov) }
+}
diff --git a/third_party/rust/iovec/src/windows.rs b/third_party/rust/iovec/src/windows.rs
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/third_party/rust/iovec/src/windows.rs