Adding upstream version 110.0.1.upstream/110.0.1upstream

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

10 files changed, 481 insertions, 0 deletions

diff --git a/third_party/rust/pin-utils/.cargo-checksum.json b/third_party/rust/pin-utils/.cargo-checksum.json
new file mode 100644
index 0000000000..9711659437
--- /dev/null
+++ b/third_party/rust/pin-utils/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"0f8296bda5b928d57bb84443422f21db3aa35d6873ce651297634d80c183dc6b","LICENSE-APACHE":"a4db788775cb25f2da419a7ccd3f1f89c3d2cfa8748fb25257596b88183b4c77","LICENSE-MIT":"28802412d2bfbafe432b305634413b41a984d30fba0df41d30aa2c8a2077c5b1","README.md":"1b0cfd43afdfb6bb718a65f9fa9954b8de3a2638f155ee021465b35f0ae98336","src/lib.rs":"bed1d1c013f78036a7288ac3ebbe07c097d9a5a435b1367085484529d784b4e0","src/projection.rs":"18dbf1a747c3c4eec31768a51e1cfbce2ec83dc80dc44a5a80bb67b21ac5715d","src/stack_pin.rs":"b79661dc21f5ab923d75e3ddb52d43faf68fba7c7d592ec1929d1fd5275d70d8","tests/projection.rs":"04dd66b306e9d43d01a181da38add1ae8b8dee9e1fd16a3a0f39571cbb467f62","tests/stack_pin.rs":"2b2245ef1fb99176dd7fef74601fe6b69d394831e20dcdbd73268b34e17ce032"},"package":"8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"}
\ No newline at end of file
diff --git a/third_party/rust/pin-utils/Cargo.toml b/third_party/rust/pin-utils/Cargo.toml
new file mode 100644
index 0000000000..5e2f779d76
--- /dev/null
+++ b/third_party/rust/pin-utils/Cargo.toml
@@ -0,0 +1,22 @@
+# 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]
+edition = "2018"
+name = "pin-utils"
+version = "0.1.0"
+authors = ["Josef Brandl <mail@josefbrandl.de>"]
+description = "Utilities for pinning\n"
+documentation = "https://docs.rs/pin-utils"
+readme = "README.md"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rust-lang-nursery/pin-utils"
diff --git a/third_party/rust/pin-utils/LICENSE-APACHE b/third_party/rust/pin-utils/LICENSE-APACHE
new file mode 100644
index 0000000000..66ccceda5e
--- /dev/null
+++ b/third_party/rust/pin-utils/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
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+1. Definitions.
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+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
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+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
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+6. Trademarks. This License does not grant permission to use the trade
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+   on Your own behalf and on Your sole responsibility, not on behalf
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+
+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 "[]"
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+Copyright 2018 The pin-utils authors
+
+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,
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diff --git a/third_party/rust/pin-utils/LICENSE-MIT b/third_party/rust/pin-utils/LICENSE-MIT
new file mode 100644
index 0000000000..06e51c4283
--- /dev/null
+++ b/third_party/rust/pin-utils/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2018 The pin-utils authors
+
+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
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+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/pin-utils/README.md b/third_party/rust/pin-utils/README.md
new file mode 100644
index 0000000000..93fdeb6fae
--- /dev/null
+++ b/third_party/rust/pin-utils/README.md
@@ -0,0 +1,42 @@
+# pin-utils
+
+Utilities for pinning
+
+[![Build Status](https://travis-ci.com/rust-lang-nursery/pin-utils.svg?branch=master)](https://travis-ci.com/rust-lang-nursery/pin-utils)
+[![Crates.io](https://img.shields.io/crates/v/pin-utils.svg)](https://crates.io/crates/pin-utils)
+
+[Documentation](https://docs.rs/pin-utils)
+
+## Usage
+
+First, add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+pin-utils = "0.1.0-alpha.4"
+```
+
+Now, you can use it:
+
+```rust
+use pin_utils::pin_mut; // And more...
+```
+
+The current version of pin-utils requires Rust 1.33 or later.
+
+# License
+
+This project is licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in pin-utils by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/pin-utils/src/lib.rs b/third_party/rust/pin-utils/src/lib.rs
new file mode 100644
index 0000000000..6198e9823a
--- /dev/null
+++ b/third_party/rust/pin-utils/src/lib.rs
@@ -0,0 +1,17 @@
+//! Utilities for pinning
+
+#![no_std]
+#![warn(missing_docs, missing_debug_implementations)]
+#![deny(bare_trait_objects)]
+#![allow(unknown_lints)]
+#![doc(html_root_url = "https://docs.rs/pin-utils/0.1.0")]
+
+#[doc(hidden)]
+pub mod core_reexport {
+    pub use core::*;
+}
+
+#[macro_use]
+mod stack_pin;
+#[macro_use]
+mod projection;
diff --git a/third_party/rust/pin-utils/src/projection.rs b/third_party/rust/pin-utils/src/projection.rs
new file mode 100644
index 0000000000..6af90c56be
--- /dev/null
+++ b/third_party/rust/pin-utils/src/projection.rs
@@ -0,0 +1,100 @@
+/// A pinned projection of a struct field.
+///
+/// # Safety
+///
+/// To make using this macro safe, three things need to be ensured:
+/// - If the struct implements [`Drop`], the [`drop`] method is not allowed to
+///   move the value of the field.
+/// - If the struct wants to implement [`Unpin`], it has to do so conditionally:
+///   The struct can only implement [`Unpin`] if the field's type is [`Unpin`].
+/// - The struct must not be `#[repr(packed)]`.
+///
+/// # Example
+///
+/// ```rust
+/// use pin_utils::unsafe_pinned;
+/// use std::marker::Unpin;
+/// use std::pin::Pin;
+///
+/// struct Foo<T> {
+///     field: T,
+/// }
+///
+/// impl<T> Foo<T> {
+///     unsafe_pinned!(field: T);
+///
+///     fn baz(mut self: Pin<&mut Self>) {
+///         let _: Pin<&mut T> = self.field(); // Pinned reference to the field
+///     }
+/// }
+///
+/// impl<T: Unpin> Unpin for Foo<T> {} // Conditional Unpin impl
+/// ```
+///
+/// Note: borrowing the field multiple times requires using `.as_mut()` to
+/// avoid consuming the `Pin`.
+///
+/// [`Unpin`]: core::marker::Unpin
+/// [`drop`]: Drop::drop
+#[macro_export]
+macro_rules! unsafe_pinned {
+    ($f:tt: $t:ty) => (
+        #[allow(unsafe_code)]
+        fn $f<'__a>(
+            self: $crate::core_reexport::pin::Pin<&'__a mut Self>
+        ) -> $crate::core_reexport::pin::Pin<&'__a mut $t> {
+            unsafe {
+                $crate::core_reexport::pin::Pin::map_unchecked_mut(
+                    self, |x| &mut x.$f
+                )
+            }
+        }
+    )
+}
+
+/// An unpinned projection of a struct field.
+///
+/// # Safety
+///
+/// This macro is unsafe because it creates a method that returns a normal
+/// non-pin reference to the struct field. It is up to the programmer to ensure
+/// that the contained value can be considered not pinned in the current
+/// context.
+///
+/// # Example
+///
+/// ```rust
+/// use pin_utils::unsafe_unpinned;
+/// use std::pin::Pin;
+///
+/// struct Bar;
+/// struct Foo {
+///     field: Bar,
+/// }
+///
+/// impl Foo {
+///     unsafe_unpinned!(field: Bar);
+///
+///     fn baz(mut self: Pin<&mut Self>) {
+///         let _: &mut Bar = self.field(); // Normal reference to the field
+///     }
+/// }
+/// ```
+///
+/// Note: borrowing the field multiple times requires using `.as_mut()` to
+/// avoid consuming the [`Pin`].
+///
+/// [`Pin`]: core::pin::Pin
+#[macro_export]
+macro_rules! unsafe_unpinned {
+    ($f:tt: $t:ty) => (
+        #[allow(unsafe_code)]
+        fn $f<'__a>(
+            self: $crate::core_reexport::pin::Pin<&'__a mut Self>
+        ) -> &'__a mut $t {
+            unsafe {
+                &mut $crate::core_reexport::pin::Pin::get_unchecked_mut(self).$f
+            }
+        }
+    )
+}
diff --git a/third_party/rust/pin-utils/src/stack_pin.rs b/third_party/rust/pin-utils/src/stack_pin.rs
new file mode 100644
index 0000000000..8a1ed2c5af
--- /dev/null
+++ b/third_party/rust/pin-utils/src/stack_pin.rs
@@ -0,0 +1,25 @@
+/// Pins a value on the stack.
+///
+/// # Example
+///
+/// ```rust
+/// # use pin_utils::pin_mut;
+/// # use core::pin::Pin;
+/// # struct Foo {}
+/// let foo = Foo { /* ... */ };
+/// pin_mut!(foo);
+/// let _: Pin<&mut Foo> = foo;
+/// ```
+#[macro_export]
+macro_rules! pin_mut {
+    ($($x:ident),* $(,)?) => { $(
+        // Move the value to ensure that it is owned
+        let mut $x = $x;
+        // Shadow the original binding so that it can't be directly accessed
+        // ever again.
+        #[allow(unused_mut)]
+        let mut $x = unsafe {
+            $crate::core_reexport::pin::Pin::new_unchecked(&mut $x)
+        };
+    )* }
+}
diff --git a/third_party/rust/pin-utils/tests/projection.rs b/third_party/rust/pin-utils/tests/projection.rs
new file mode 100644
index 0000000000..492c26d9a8
--- /dev/null
+++ b/third_party/rust/pin-utils/tests/projection.rs
@@ -0,0 +1,27 @@
+use pin_utils::{unsafe_pinned, unsafe_unpinned, pin_mut};
+use std::pin::Pin;
+use std::marker::Unpin;
+
+struct Foo<T1, T2> {
+    field1: T1,
+    field2: T2,
+}
+
+impl<T1, T2> Foo<T1, T2> {
+    unsafe_pinned!(field1: T1);
+    unsafe_unpinned!(field2: T2);
+}
+
+impl<T1: Unpin, T2> Unpin for Foo<T1, T2> {} // Conditional Unpin impl
+
+#[test]
+fn projection() {
+    let foo = Foo { field1: 1, field2: 2 };
+    pin_mut!(foo);
+
+    let x1: Pin<&mut i32> = foo.as_mut().field1();
+    assert_eq!(*x1, 1);
+
+    let x2: &mut i32 = foo.as_mut().field2();
+    assert_eq!(*x2, 2);
+}
diff --git a/third_party/rust/pin-utils/tests/stack_pin.rs b/third_party/rust/pin-utils/tests/stack_pin.rs
new file mode 100644
index 0000000000..4b6758dc12
--- /dev/null
+++ b/third_party/rust/pin-utils/tests/stack_pin.rs
@@ -0,0 +1,21 @@
+#![forbid(unsafe_code)] // pin_mut! is completely safe.
+
+use pin_utils::pin_mut;
+use core::pin::Pin;
+
+#[test]
+fn stack_pin() {
+    struct Foo {}
+    let foo = Foo {};
+    pin_mut!(foo);
+    let _: Pin<&mut Foo> = foo;
+
+    let bar = Foo {};
+    let baz = Foo {};
+    pin_mut!(
+        bar,
+        baz,
+    );
+    let _: Pin<&mut Foo> = bar;
+    let _: Pin<&mut Foo> = baz;
+}