impl Drop for Device to call Device::ungrab() on drop; derive Debug for Device; expose is_grabbed() on Device and RawDevice

Author: tgrushka

src/raw_stream.rs

@@ -662,6 +662,11 @@ impl RawDevice {
         Ok(())
     }
 
+    /// Whether the device is currently grabbed for exclusive use or not.
+    pub fn is_grabbed(&self) -> bool {
+        self.grabbed
+    }
+
     /// Send an event to the device.
     ///
     /// Events that are typically sent to devices are

src/sync_stream.rs

@@ -27,6 +27,7 @@ use std::{fmt, io};
 /// If `fetch_events()` isn't called often enough and the kernel drops events from its internal
 /// buffer, synthetic events will be injected into the iterator returned by `fetch_events()` and
 /// [`Device::cached_state()`] will be kept up to date when `fetch_events()` is called.
+#[derive(Debug)]
 pub struct Device {
     raw: RawDevice,
     prev_state: DeviceState,
@@ -383,6 +384,11 @@ impl Device {
         self.raw.ungrab()
     }
 
+    /// Whether the device is currently grabbed for exclusive use or not.
+    pub fn is_grabbed(&self) -> bool {
+        self.raw.is_grabbed()
+    }
+
     /// Send an event to the device.
     ///
     /// Events that are typically sent to devices are
@@ -410,6 +416,14 @@ impl Device {
     }
 }
 
+impl Drop for Device {
+    fn drop(&mut self) {
+        if let Err(error) = self.ungrab() {
+            eprintln!("Failed to ungrab device: {error}");
+        }
+    }
+}
+
 impl AsFd for Device {
     fn as_fd(&self) -> BorrowedFd<'_> {
         self.raw.as_fd()