update Rust nightly to 2020-04-06

.github/workflows/main.yml

@@ -7,11 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - run: rm rust-toolchain
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: nightly
+        toolchain: nightly-2020-04-06
         override: true
         components: rustfmt, clippy
     - name: Check code format
@@ -30,7 +29,7 @@ jobs:
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: nightly-2020-03-23
+        toolchain: nightly-2020-04-06
         components: rust-src, llvm-tools-preview
 
     - name: Cache QEMU

kernel/Cargo.lock

@@ -107,7 +107,7 @@ dependencies = [
 
 [[package]]
 name = "buddy_system_allocator"
-version = "0.3.8"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustversion 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -331,7 +331,7 @@ name = "rboot"
 version = "0.1.2"
 dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "uefi 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "uefi 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.9.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "xmas-elf 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -349,7 +349,7 @@ dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitmap-allocator 0.1.0 (git+https://github.com/rcore-os/bitmap-allocator)",
  "bitvec 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "buddy_system_allocator 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "buddy_system_allocator 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
  "compression 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "device_tree 1.0.3 (git+https://github.com/rcore-os/device_tree-rs)",
@@ -580,7 +580,7 @@ dependencies = [
 
 [[package]]
 name = "uefi"
-version = "0.4.3"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -728,7 +728,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum bitmap-allocator 0.1.0 (git+https://github.com/rcore-os/bitmap-allocator)" = "<none>"
 "checksum bitvec 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1fe4300c1d7a9ea6f3e3f39c10b39862bb79e1175c0572b6b49539a30e5562f5"
-"checksum buddy_system_allocator 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "09072aa89a810228c822e132e4639ff17bab014ba5b2dce5270a6331ff1963ca"
+"checksum buddy_system_allocator 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9e953b958d83e13a44b1ead5b6aaa2a5f854bd5170239a66b606e030a14d018f"
 "checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
 "checksum cast 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4b9434b9a5aa1450faa3f9cb14ea0e8c53bb5d2b3c1bfd1ab4fc03e9f33fbfb0"
 "checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
@@ -780,7 +780,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
 "checksum uart_16550 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "58fc0bc8ff1beb1436e8c4ce9c4b47f6f6c1376b56fb91505fabeef13743eb33"
 "checksum ucs2 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "85061f4e43545a613c0da6b87725bf23f8da8613cf2473719c4f71a270c4ce8a"
-"checksum uefi 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "36c63ddfef80d9e7f1318917f6c05135b3b98027e973a9e9f0a6aebe87b95934"
+"checksum uefi 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5cec6a2850639f588cc8042140b5deaa2f2170c23db5adb08f4316fa04cdb4a0"
 "checksum uefi-macros 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c7d4a1b0215dc72e83d8d501b3275eb59477d3b595be8861abfb8ab110180955"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum usize_conversions 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f70329e2cbe45d6c97a5112daad40c34cd9a4e18edb5a2a18fefeb584d8d25e5"

kernel/Cargo.toml

@@ -55,7 +55,7 @@ bitflags = "1.2"
 bit_field = "0.10"
 volatile = "0.2"
 bitvec = { version = "0.17", default-features = false, features = ["alloc"] }
-buddy_system_allocator = "0.3"
+buddy_system_allocator = "0.3.9"
 pci = { git = "https://github.com/rcore-os/pci-rs" }
 device_tree = { git = "https://github.com/rcore-os/device_tree-rs" }
 isomorphic_drivers = { git = "https://github.com/rcore-os/isomorphic_drivers", features = ["log"] }

kernel/src/sync/mod.rs

@@ -17,9 +17,6 @@
 //!     完全照搬`std::sync::Semaphore`，std中已经废弃。
 //!     貌似在Rust中并不常用，一般都用`Mutex`。
 //!
-//! * `mpsc`: 消息传递通道。
-//!     多生产者-单消费者的FIFO队列。用于在线程间传递数据。
-//!
 //! * `test`: 测试。
 //!     目前分别用`Mutex`和`Condvar`(Monitor)实现了哲学家就餐问题。
 //!
@@ -55,7 +52,6 @@ pub use self::mutex::*;
 pub use self::semaphore::*;
 
 mod condvar;
-pub mod mpsc;
 mod mutex;
 mod semaphore;
 pub mod test;

kernel/src/sync/mpsc.rs

@@ -1,145 +0,0 @@
-use super::Condvar;
-use super::SpinLock as Mutex;
-use alloc::{collections::VecDeque, sync::Arc, sync::Weak};
-
-struct Channel<T> {
-    deque: Mutex<VecDeque<T>>,
-    pushed: Condvar,
-}
-
-impl<T> Default for Channel<T> {
-    fn default() -> Self {
-        Channel {
-            deque: Mutex::<_>::default(),
-            pushed: Condvar::default(),
-        }
-    }
-}
-
-/// The receiving half of Rust's channel (or sync_channel) type.
-/// This half can only be owned by one thread.
-///
-/// Messages sent to the channel can be retrieved using recv.
-pub struct Receiver<T> {
-    inner: Arc<Channel<T>>,
-}
-
-unsafe impl<T: Send> Send for Receiver<T> {}
-
-impl<T> !Sync for Receiver<T> {}
-
-#[derive(Debug)]
-pub struct RecvError;
-
-impl<T> Receiver<T> {
-    /// Attempts to wait for a value on this receiver,
-    /// returning an error if the corresponding channel has hung up.
-    pub fn recv(&self) -> Result<T, RecvError> {
-        let mut deque = self.inner.deque.lock();
-        while deque.is_empty() {
-            deque = self.inner.pushed.wait(deque);
-        }
-        Ok(deque.pop_front().unwrap())
-    }
-}
-
-/// The sending-half of Rust's asynchronous channel type.
-/// This half can only be owned by one thread, but it can be cloned to send to other threads.
-///
-/// Messages can be sent through this channel with send.
-#[derive(Clone)]
-pub struct Sender<T> {
-    inner: Weak<Channel<T>>,
-}
-
-unsafe impl<T: Send> Send for Sender<T> {}
-
-impl<T> !Sync for Sender<T> {}
-
-#[derive(Debug)]
-pub struct SendError<T>(pub T);
-
-impl<T> Sender<T> {
-    /// Attempts to send a value on this channel,
-    /// returning it back if it could not be sent.
-    pub fn send(&self, t: T) -> Result<(), SendError<T>> {
-        match self.inner.upgrade() {
-            None => Err(SendError(t)),
-            Some(inner) => {
-                let mut deque = inner.deque.lock();
-                deque.push_back(t);
-                inner.pushed.notify_one();
-                Ok(())
-            }
-        }
-    }
-}
-
-/// Creates a new asynchronous channel, returning the sender/receiver halves.
-pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
-    let channel = Arc::new(Channel::<T>::default());
-    let sender = Sender {
-        inner: Arc::downgrade(&channel),
-    };
-    let receiver = Receiver { inner: channel };
-    (sender, receiver)
-}
-
-pub mod test {
-    //! Copied from std::mpsc::test
-
-    use super::*;
-    use crate::thread;
-    use alloc::boxed::Box;
-
-    fn smoke() {
-        let (tx, rx) = channel::<i32>();
-        tx.send(1).unwrap();
-        assert_eq!(rx.recv().unwrap(), 1);
-    }
-
-    fn drop_full() {
-        let (tx, _rx) = channel::<Box<isize>>();
-        tx.send(Box::new(1)).unwrap();
-    }
-
-    fn drop_full_shared() {
-        let (tx, _rx) = channel::<Box<isize>>();
-        drop(tx.clone());
-        drop(tx.clone());
-        tx.send(Box::new(1)).unwrap();
-    }
-
-    fn smoke_shared() {
-        let (tx, rx) = channel::<i32>();
-        tx.send(1).unwrap();
-        assert_eq!(rx.recv().unwrap(), 1);
-        let tx = tx.clone();
-        tx.send(1).unwrap();
-        assert_eq!(rx.recv().unwrap(), 1);
-    }
-
-    fn smoke_threads() {
-        let (tx, rx) = channel::<i32>();
-        let _t = thread::spawn(move || {
-            tx.send(1).unwrap();
-        });
-        assert_eq!(rx.recv().unwrap(), 1);
-    }
-
-    fn smoke_port_gone() {
-        let (tx, rx) = channel::<i32>();
-        drop(rx);
-        assert!(tx.send(1).is_err());
-    }
-
-    pub fn test_all() {
-        smoke();
-        drop_full();
-        drop_full_shared();
-        smoke_shared();
-        smoke_threads();
-        smoke_port_gone();
-        println!("mpsc test end");
-    }
-}

rboot

@@ -1 +1 @@
-Subproject commit 33a2d215957b704a26dab52484d75d47dbb49bdb
+Subproject commit 048fa09b6b9614ceee52f8d7a8e4587ae3ca61e8

rust-toolchain

@@ -1 +1 @@
-nightly-2020-03-23
+nightly-2020-04-06