refactor(driver): remove one Result usage

compio-driver/src/fusion/mod.rs

@@ -84,12 +84,12 @@ impl Driver {
         }
     }
 
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
+    pub fn handle(&self) -> NotifyHandle {
         let fuse = match &self.fuse {
-            FuseDriver::Poll(driver) => FuseNotifyHandle::Poll(driver.handle()?),
-            FuseDriver::IoUring(driver) => FuseNotifyHandle::IoUring(driver.handle()?),
+            FuseDriver::Poll(driver) => FuseNotifyHandle::Poll(driver.handle()),
+            FuseDriver::IoUring(driver) => FuseNotifyHandle::IoUring(driver.handle()),
         };
-        Ok(NotifyHandle::from_fuse(fuse))
+        NotifyHandle::from_fuse(fuse)
     }
 }
 

compio-driver/src/iocp/mod.rs

@@ -249,7 +249,7 @@ impl Driver {
         match op_pin.op_type() {
             OpType::Overlapped => unsafe { op_pin.operate(optr.cast()) },
             OpType::Blocking => loop {
-                if self.push_blocking(user_data)? {
+                if self.push_blocking(user_data) {
                     break Poll::Pending;
                 } else {
                     // It's OK to wait forever, because any blocking task will notify the IOCP after
@@ -267,17 +267,16 @@ impl Driver {
         }
     }
 
-    fn push_blocking(&mut self, user_data: usize) -> io::Result<bool> {
+    fn push_blocking(&mut self, user_data: usize) -> bool {
         let port = self.port.handle();
-        Ok(self
-            .pool
+        self.pool
             .dispatch(move || {
                 let mut op = unsafe { Key::<dyn OpCode>::new_unchecked(user_data) };
                 let optr = op.as_mut_ptr();
                 let res = op.operate_blocking();
                 port.post(res, optr).ok();
             })
-            .is_ok())
+            .is_ok()
     }
 
     fn create_entry(
@@ -322,11 +321,8 @@ impl Driver {
         Ok(())
     }
 
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
-        Ok(NotifyHandle::new(
-            self.port.handle(),
-            self.notify_overlapped.clone(),
-        ))
+    pub fn handle(&self) -> NotifyHandle {
+        NotifyHandle::new(self.port.handle(), self.notify_overlapped.clone())
     }
 }
 

compio-driver/src/iour/mod.rs

@@ -252,7 +252,7 @@ impl Driver {
                 Poll::Pending
             }
             OpEntry::Blocking => loop {
-                if self.push_blocking(user_data)? {
+                if self.push_blocking(user_data) {
                     break Poll::Pending;
                 } else {
                     self.poll_blocking();
@@ -261,20 +261,18 @@ impl Driver {
         }
     }
 
-    fn push_blocking(&mut self, user_data: usize) -> io::Result<bool> {
-        let handle = self.handle()?;
+    fn push_blocking(&mut self, user_data: usize) -> bool {
+        let handle = self.handle();
         let completed = self.pool_completed.clone();
-        let is_ok = self
-            .pool
+        self.pool
             .dispatch(move || {
                 let mut op = unsafe { Key::<dyn crate::sys::OpCode>::new_unchecked(user_data) };
                 let op_pin = op.as_op_pin();
                 let res = op_pin.call_blocking();
                 completed.push(Entry::new(user_data, res));
                 handle.notify().ok();
             })
-            .is_ok();
-        Ok(is_ok)
+            .is_ok()
     }
 
     pub unsafe fn poll(&mut self, timeout: Option<Duration>) -> io::Result<()> {
@@ -290,7 +288,7 @@ impl Driver {
         Ok(())
     }
 
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
+    pub fn handle(&self) -> NotifyHandle {
         self.notifier.handle()
     }
 }
@@ -360,8 +358,8 @@ impl Notifier {
         }
     }
 
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
-        Ok(NotifyHandle::new(self.fd.clone()))
+    pub fn handle(&self) -> NotifyHandle {
+        NotifyHandle::new(self.fd.clone())
     }
 }
 

compio-driver/src/lib.rs

@@ -311,7 +311,7 @@ impl Proactor {
     }
 
     /// Create a notify handle to interrupt the inner driver.
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
+    pub fn handle(&self) -> NotifyHandle {
         self.driver.handle()
     }
 }

compio-driver/src/poll/mod.rs

@@ -438,8 +438,8 @@ impl Driver {
         Ok(())
     }
 
-    pub fn handle(&self) -> io::Result<NotifyHandle> {
-        Ok(NotifyHandle::new(self.poll.clone()))
+    pub fn handle(&self) -> NotifyHandle {
+        NotifyHandle::new(self.poll.clone())
     }
 }
 

compio-driver/tests/file.rs

@@ -100,7 +100,7 @@ fn register_multiple() {
 fn notify() {
     let mut driver = Proactor::new().unwrap();
 
-    let handle = driver.handle().unwrap();
+    let handle = driver.handle();
 
     let thread = std::thread::spawn(move || {
         std::thread::sleep(Duration::from_secs(1));

compio-runtime/src/runtime/mod.rs

@@ -159,11 +159,7 @@ impl Runtime {
     /// The caller should ensure the captured lifetime long enough.
     pub unsafe fn spawn_unchecked<F: Future>(&self, future: F) -> Task<F::Output> {
         let runnables = self.runnables.clone();
-        let handle = self
-            .driver
-            .borrow()
-            .handle()
-            .expect("cannot create notify handle of the proactor");
+        let handle = self.driver.borrow().handle();
         let schedule = move |runnable| {
             runnables.schedule(runnable, &handle);
         };