Adding upstream version 124.0.1.upstream/124.0.1

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

6 files changed, 655 insertions, 0 deletions

diff --git a/third_party/rust/runloop/.cargo-checksum.json b/third_party/rust/runloop/.cargo-checksum.json
new file mode 100644
index 0000000000..fd50999c06
--- /dev/null
+++ b/third_party/rust/runloop/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"6148ea66fe5c0f49d36f01cc88b7aaf90a058ffb406402f0c9e8d790b32a509d","LICENSE":"b946744aeda89b467929585fe8eeb5461847695220c1b168fb375d8abd4ea3d0","README.md":"466aa6f249e465158175bd05567c1c9b996c3a57e22666ef78273e2a2f5a3f02","rustfmt.toml":"de4e1daab481c1572805aed3e51e72c5dc1b3e5af757bc675e1717b251c6e922","src/lib.rs":"e904c1c9d0fbc6dcf9749346f9ee612747e9755b33f60d57689249594d6b0750"},"package":"5d79b4b604167921892e84afbbaad9d5ad74e091bf6c511d9dbfb0593f09fabd"}
\ No newline at end of file
diff --git a/third_party/rust/runloop/Cargo.toml b/third_party/rust/runloop/Cargo.toml
new file mode 100644
index 0000000000..3746a73a5d
--- /dev/null
+++ b/third_party/rust/runloop/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]
+name = "runloop"
+version = "0.1.0"
+authors = ["Tim Taubert <tim@timtaubert.de>"]
+description = "Cancelable non-blocking polling threads (with optional timeouts)."
+homepage = "https://github.com/ttaubert/rust-runloop/"
+readme = "README.md"
+keywords = ["runloop", "threads"]
+license = "MPL-2.0"
+repository = "https://github.com/ttaubert/rust-runloop/"
diff --git a/third_party/rust/runloop/LICENSE b/third_party/rust/runloop/LICENSE
new file mode 100644
index 0000000000..398385c9fb
--- /dev/null
+++ b/third_party/rust/runloop/LICENSE
@@ -0,0 +1,374 @@
+ Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+means each individual or legal entity that creates, contributes to
+the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+means the combination of the Contributions of others (if any) used
+by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+means Source Code Form to which the initial Contributor has attached
+the notice in Exhibit A, the Executable Form of such Source Code
+Form, and Modifications of such Source Code Form, in each case
+including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+means
+
+(a) that the initial Contributor has attached the notice described
+in Exhibit B to the Covered Software; or
+
+(b) that the Covered Software was made available under the terms of
+version 1.1 or earlier of the License, but not also under the
+terms of a Secondary License.
+
+1.6. "Executable Form"
+means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+means a work that combines Covered Software with other material, in
+a separate file or files, that is not Covered Software.
+
+1.8. "License"
+means this document.
+
+1.9. "Licensable"
+means having the right to grant, to the maximum extent possible,
+whether at the time of the initial grant or subsequently, any and
+all of the rights conveyed by this License.
+
+1.10. "Modifications"
+means any of the following:
+
+(a) any file in Source Code Form that results from an addition to,
+deletion from, or modification of the contents of Covered
+Software; or
+
+(b) any new file in Source Code Form that contains any Covered
+Software.
+
+1.11. "Patent Claims" of a Contributor
+means any patent claim(s), including without limitation, method,
+process, and apparatus claims, in any patent Licensable by such
+Contributor that would be infringed, but for the grant of the
+License, by the making, using, selling, offering for sale, having
+made, import, or transfer of either its Contributions or its
+Contributor Version.
+
+1.12. "Secondary License"
+means either the GNU General Public License, Version 2.0, the GNU
+Lesser General Public License, Version 2.1, the GNU Affero General
+Public License, Version 3.0, or any later versions of those
+licenses.
+
+1.13. "Source Code Form"
+means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+means an individual or a legal entity exercising rights under this
+License. For legal entities, "You" includes any entity that
+controls, is controlled by, or is under common control with You. For
+purposes of this definition, "control" means (a) the power, direct
+or indirect, to cause the direction or management of such entity,
+whether by contract or otherwise, or (b) ownership of more than
+fifty percent (50%) of the outstanding shares or beneficial
+ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+Licensable by such Contributor to use, reproduce, make available,
+modify, display, perform, distribute, and otherwise exploit its
+Contributions, either on an unmodified basis, with Modifications, or
+as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+for sale, have made, import, and otherwise transfer either its
+Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+or
+
+(b) for infringements caused by: (i) Your and any other third party's
+modifications of Covered Software, or (ii) the combination of its
+Contributions with other software (except as part of its Contributor
+Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+Form, as described in Section 3.1, and You must inform recipients of
+the Executable Form how they can obtain a copy of such Source Code
+Form by reasonable means in a timely manner, at a charge no more
+than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+License, or sublicense it under different terms, provided that the
+license for the Executable Form does not attempt to limit or alter
+the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+* *
+* 6. Disclaimer of Warranty *
+* ------------------------- *
+* *
+* Covered Software is provided under this License on an "as is" *
+* basis, without warranty of any kind, either expressed, implied, or *
+* statutory, including, without limitation, warranties that the *
+* Covered Software is free of defects, merchantable, fit for a *
+* particular purpose or non-infringing. The entire risk as to the *
+* quality and performance of the Covered Software is with You. *
+* Should any Covered Software prove defective in any respect, You *
+* (not any Contributor) assume the cost of any necessary servicing, *
+* repair, or correction. This disclaimer of warranty constitutes an *
+* essential part of this License. No use of any Covered Software is *
+* authorized under this License except under this disclaimer. *
+* *
+************************************************************************
+
+************************************************************************
+* *
+* 7. Limitation of Liability *
+* -------------------------- *
+* *
+* Under no circumstances and under no legal theory, whether tort *
+* (including negligence), contract, or otherwise, shall any *
+* Contributor, or anyone who distributes Covered Software as *
+* permitted above, be liable to You for any direct, indirect, *
+* special, incidental, or consequential damages of any character *
+* including, without limitation, damages for lost profits, loss of *
+* goodwill, work stoppage, computer failure or malfunction, or any *
+* and all other commercial damages or losses, even if such party *
+* shall have been informed of the possibility of such damages. This *
+* limitation of liability shall not apply to liability for death or *
+* personal injury resulting from such party's negligence to the *
+* extent applicable law prohibits such limitation. Some *
+* jurisdictions do not allow the exclusion or limitation of *
+* incidental or consequential damages, so this exclusion and *
+* limitation may not apply to You. *
+* *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+This Source Code Form is "Incompatible With Secondary Licenses", as
+defined by the Mozilla Public License, v. 2.0.
+
diff --git a/third_party/rust/runloop/README.md b/third_party/rust/runloop/README.md
new file mode 100644
index 0000000000..8b9508b93b
--- /dev/null
+++ b/third_party/rust/runloop/README.md
@@ -0,0 +1,88 @@
+# runloop [![Crates.io](https://img.shields.io/crates/v/runloop.svg)](https://crates.io/crates/runloop) [![Build Status](https://travis-ci.org/ttaubert/rust-runloop.svg?branch=master)](https://travis-ci.org/ttaubert/rust-runloop) [![License](https://img.shields.io/badge/license-MPL2-blue.svg?style=flat)](LICENSE)
+
+This crate provides a cancelable `RunLoop` to simplify writing non-blocking
+polling threads.
+
+## Usage
+
+The closure passed to `RunLoop::new()` or `RunLoop::new_with_timeout()` will be
+called once and is executed in the newly spawned thread. It should periodically
+check, via the given callback argument named `alive` in the below examples,
+whether the runloop was requested to terminate.
+
+`RunLoop::alive()` allows the owning thread to check whether the runloop is
+still alive. This can be useful for debugging (e.g. assertions) or early
+returns on failure in the passed closure.
+
+`RunLoop::cancel()` will request the runloop to terminate. If the runloop is
+still active it will join the thread and block. If the runloop already
+terminated on its own this will be a no-op.
+
+### Example: An endless runloop
+
+A runloop does not have to terminate on its own, it can wait until the
+`cancel()` method is called.
+
+```rust
+// This runloop runs until we stop it.
+let rloop = RunLoop::new(|alive| {
+    while alive() { /* endless loop */ }
+})?;
+
+// Loop a few times.
+thread::sleep_ms(500);
+assert!(rloop.alive());
+
+// This will cause `alive()` to return false
+// and block until the thread was joined.
+rloop.cancel();
+```
+
+### Example: A runloop with a timeout
+
+Creating a runloop via `new_with_timeout()` ensures that `alive()` returns
+`false` after the given duration.
+
+```rust
+// This runloop will time out after 10ms.
+let rloop = RunLoop::new_with_timeout(|alive| {
+    while alive() { /* endless loop */ }
+}, 10)?;
+
+// Wait for the timeout.
+while rloop.alive() { /* loop */ }
+
+// This won't block anymore, it's a no-op.
+// The runloop has already terminated.
+rloop.cancel();
+```
+
+### Example: A runloop with channels
+
+As a runloop will run the given closure in a newly spawned thread it requires
+channels and similar utilities to communicate back to the owning thread.
+
+```rust
+let (tx, rx) = channel();
+
+// This runloop will send a lot of numbers.
+let rloop = RunLoop::new(move |alive| {
+    let mut counter = 0u64;
+    while alive() {
+        tx.send(counter).unwrap();
+        counter += 1;
+    }
+})?;
+
+// Wait until we receive a specific number.
+while rx.recv().unwrap() < 50 { /* loop */ }
+
+// We've seen enough.
+rloop.cancel();
+```
+
+## License
+
+`runloop` is distributed under the terms of the Mozilla Public License, v. 2.0.
+
+See [LICENSE](LICENSE) for details.
diff --git a/third_party/rust/runloop/rustfmt.toml b/third_party/rust/runloop/rustfmt.toml
new file mode 100644
index 0000000000..ed37b0c63a
--- /dev/null
+++ b/third_party/rust/runloop/rustfmt.toml
@@ -0,0 +1,2 @@
+comment_width = 200
+wrap_comments = true
diff --git a/third_party/rust/runloop/src/lib.rs b/third_party/rust/runloop/src/lib.rs
new file mode 100644
index 0000000000..d705e605d0
--- /dev/null
+++ b/third_party/rust/runloop/src/lib.rs
@@ -0,0 +1,168 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::io;
+use std::sync::{Arc, Mutex, Weak};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::thread::{Builder, JoinHandle};
+use std::time::{Duration, Instant};
+
+struct Canary {
+    alive: AtomicBool,
+    thread: Mutex<Option<JoinHandle<()>>>,
+}
+
+impl Canary {
+    fn new() -> Self {
+        Self {
+            alive: AtomicBool::new(true),
+            thread: Mutex::new(None),
+        }
+    }
+}
+
+pub struct RunLoop {
+    flag: Weak<Canary>,
+}
+
+impl RunLoop {
+    pub fn new<F, T>(fun: F) -> io::Result<Self>
+    where
+        F: FnOnce(&Fn() -> bool) -> T,
+        F: Send + 'static,
+    {
+        Self::new_with_timeout(fun, 0 /* no timeout */)
+    }
+
+    pub fn new_with_timeout<F, T>(fun: F, timeout_ms: u64) -> io::Result<Self>
+    where
+        F: FnOnce(&Fn() -> bool) -> T,
+        F: Send + 'static,
+    {
+        let flag = Arc::new(Canary::new());
+        let flag_ = flag.clone();
+
+        // Spawn the run loop thread.
+        let thread = Builder::new().spawn(move || {
+            let timeout = Duration::from_millis(timeout_ms);
+            let start = Instant::now();
+
+            // A callback to determine whether the thread should terminate.
+            let still_alive = || {
+                // `flag.alive` will be false after cancel() was called.
+                flag.alive.load(Ordering::Relaxed) &&
+                // If a timeout was provided, we'll check that too.
+                (timeout_ms == 0 || start.elapsed() < timeout)
+            };
+
+            // Ignore return values.
+            let _ = fun(&still_alive);
+        })?;
+
+        // We really should never fail to lock here.
+        let mut guard = (*flag_).thread.lock().map_err(|_| {
+            io::Error::new(io::ErrorKind::Other, "failed to lock")
+        })?;
+
+        // Store the thread handle so we can join later.
+        *guard = Some(thread);
+
+        Ok(Self { flag: Arc::downgrade(&flag_) })
+    }
+
+    // Cancels the run loop and waits for the thread to terminate.
+    // This is a potentially BLOCKING operation.
+    pub fn cancel(&self) {
+        // If the thread still exists...
+        if let Some(flag) = self.flag.upgrade() {
+            // ...let the run loop terminate.
+            flag.alive.store(false, Ordering::Relaxed);
+
+            // Locking should never fail here either.
+            if let Ok(mut guard) = flag.thread.lock() {
+                // This really can't fail.
+                if let Some(handle) = (*guard).take() {
+                    // This might fail, ignore.
+                    let _ = handle.join();
+                }
+            }
+        }
+    }
+
+    // Tells whether the runloop is alive.
+    pub fn alive(&self) -> bool {
+        // If the thread still exists...
+        if let Some(flag) = self.flag.upgrade() {
+            flag.alive.load(Ordering::Relaxed)
+        } else {
+            false
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::{Arc, Barrier};
+    use std::sync::mpsc::channel;
+
+    use super::RunLoop;
+
+    #[test]
+    fn test_empty() {
+        // Create a runloop that exits right away.
+        let rloop = RunLoop::new(|_| {}).unwrap();
+        while rloop.alive() { /* wait */ }
+        rloop.cancel(); // noop
+    }
+
+    #[test]
+    fn test_cancel_early() {
+        // Create a runloop and cancel it before the thread spawns.
+        RunLoop::new(|alive| assert!(!alive())).unwrap().cancel();
+    }
+
+    #[test]
+    fn test_cancel_endless_loop() {
+        let barrier = Arc::new(Barrier::new(2));
+        let b = barrier.clone();
+
+        // Create a runloop that never exits.
+        let rloop = RunLoop::new(move |alive| {
+            b.wait();
+            while alive() { /* loop */ }
+        }).unwrap();
+
+        barrier.wait();
+        assert!(rloop.alive());
+        rloop.cancel();
+        assert!(!rloop.alive());
+    }
+
+    #[test]
+    fn test_timeout() {
+        // Create a runloop that never exits, but times out after 1ms.
+        let rloop = RunLoop::new_with_timeout(|alive| while alive() {}, 1).unwrap();
+
+        while rloop.alive() { /* wait */ }
+        assert!(!rloop.alive());
+        rloop.cancel(); // noop
+    }
+
+    #[test]
+    fn test_channel() {
+        let (tx, rx) = channel();
+
+        // A runloop that sends data via a channel.
+        let rloop = RunLoop::new(move |alive| while alive() {
+            tx.send(0u8).unwrap();
+        }).unwrap();
+
+        // Wait until the data arrives.
+        assert_eq!(rx.recv().unwrap(), 0u8);
+
+        assert!(rloop.alive());
+        rloop.cancel();
+        assert!(!rloop.alive());
+    }
+}