feat: ported to Vita target

Fixes #160

.github/workflows/ci.yml

@@ -81,15 +81,16 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
+        rust: [nightly, stable]
     steps:
     - uses: actions/checkout@v4
     - name: Install Rust
-      run: rustup update stable
+      run: rustup update ${{ matrix.rust }}
     - name: Install cross
       uses: taiki-e/install-action@cross
     - name: Add rust-src
       if: startsWith(matrix.rust, 'nightly')
-      run: rustup component add rust-src
+      run: rustup +nightly component add rust-src
     # We don't test BSDs, since we already test them in Cirrus.
     - name: Android
       if: startsWith(matrix.os, 'ubuntu')
@@ -121,11 +122,13 @@ jobs:
         cargo check --target x86_64-unknown-redox
     - name: HermitOS
       if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
-      run: |
-        cargo -Zbuild-std check --target x86_64-unknown-hermit
+      run: cargo +nightly check -Z build-std --target x86_64-unknown-hermit
     - name: Check haiku
       if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
-      run: cargo check -Z build-std --target x86_64-unknown-haiku
+      run: cargo +nightly check -Z build-std --target x86_64-unknown-haiku
+    - name: Check vita
+      if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
+      run: cargo +nightly check -Z build-std --target armv7-sony-vita-newlibeabihf
 
   wine:
     runs-on: ubuntu-22.04

Cargo.toml

@@ -55,4 +55,6 @@ socket2 = "0.5.5"
 
 [target.'cfg(unix)'.dev-dependencies]
 libc = "0.2"
+
+[target.'cfg(all(unix, not(target_os="vita")))'.dev-dependencies]
 signal-hook = "0.3.17"

src/lib.rs

@@ -402,7 +402,7 @@ impl Event {
 
     /// Tells if this event is the result of a connection failure.
     ///
-    /// This function checks if an error exist,particularlly useful in detecting if TCP connection failed. It corresponds to the `EPOLLERR` event in Linux
+    /// This function checks if an error exist, particularly useful in detecting if TCP connection failed. It corresponds to the `EPOLLERR` event in Linux
     /// and `CONNECT_FAILED` event in Windows IOCP.
     ///
     /// ## Caveats

src/os/iocp.rs

@@ -1,4 +1,4 @@
-//! Functionality that is only availale for IOCP-based platforms.
+//! Functionality that is only available for IOCP-based platforms.
 
 pub use crate::sys::CompletionPacket;
 

src/poll.rs

@@ -685,7 +685,7 @@ mod notify {
             self.read_pipe.as_fd()
         }
 
-        /// Provides the poll flags to be used when registering the read half of the botify pipe with the `Poller`.
+        /// Provides the poll flags to be used when registering the read half of the notify pipe with the `Poller`.
         pub(super) fn poll_flags(&self) -> PollFlags {
             PollFlags::RDNORM
         }
@@ -699,7 +699,25 @@ mod notify {
 
         /// Pops a notification (if any) from the pipe.
         pub(super) fn pop_notification(&self) -> Result<(), io::Error> {
-            read(&self.read_pipe, &mut [0; 1])?;
+            // Pipes on Vita do not guarantee that after `write` call succeeds, the
+            // data becomes immediately available for reading on the other side of the pipe.
+            // To ensure that the notification is not lost, the read side of the pipe is temporarily
+            // switched to blocking for a single `read` call.
+            #[cfg(target_os = "vita")]
+            rustix::fs::fcntl_setfl(
+                &self.read_pipe,
+                rustix::fs::fcntl_getfl(&self.read_pipe)? & !rustix::fs::OFlags::NONBLOCK,
+            )?;
+
+            let result = read(&self.read_pipe, &mut [0; 1]);
+
+            #[cfg(target_os = "vita")]
+            rustix::fs::fcntl_setfl(
+                &self.read_pipe,
+                rustix::fs::fcntl_getfl(&self.read_pipe)? | rustix::fs::OFlags::NONBLOCK,
+            )?;
+
+            result?;
 
             Ok(())
         }
@@ -729,7 +747,7 @@ mod notify {
 
     /// A notification pipe.
     ///
-    /// This implementation uses ther `eventfd` syscall to send notifications.
+    /// This implementation uses the `eventfd` syscall to send notifications.
     #[derive(Debug)]
     pub(super) struct Notify {
         /// The file descriptor of the eventfd object. This is also stored as the first

tests/concurrent_modification.rs

@@ -76,7 +76,7 @@ fn concurrent_modify() -> io::Result<()> {
     Ok(())
 }
 
-#[cfg(unix)]
+#[cfg(all(unix, not(target_os = "vita")))]
 #[test]
 fn concurrent_interruption() -> io::Result<()> {
     struct MakeItSend<T>(T);