Replace mutex unwraps with proper error handling

frontend/src-tauri/src/platform/windows/cursor.rs

@@ -197,12 +197,28 @@ unsafe fn create_cursor_from_image(image: &RgbaImage) -> Option<SyncHCURSOR> {
     Some(SyncHCURSOR(cursor))
 }
 
+// Helper function to safely lock a mutex with error handling
+fn safe_lock<'a, T>(mutex: &'a std::sync::Mutex<T>, operation_name: &str) -> Option<std::sync::MutexGuard<'a, T>> {
+    match mutex.lock() {
+        Ok(guard) => Some(guard),
+        Err(poisoned) => {
+            eprintln!("Mutex poisoned during {}: {}", operation_name, poisoned);
+            // For cleanup operations, we can still try to recover the data
+            Some(poisoned.into_inner())
+        }
+    }
+}
+
 // Cleanup function to restore cursors and clean up resources
 pub fn cleanup() {
     // Check if we have original cursors saved before attempting restoration
-    let has_original_cursors = {
+    let _has_original_cursors = {
-        let guard = ORIGINAL_CURSORS.lock().unwrap();
+        if let Some(guard) = safe_lock(&ORIGINAL_CURSORS, "checking original cursors") {
             guard.is_some()
+        } else {
+            eprintln!("Failed to check original cursors during cleanup");
+            false
+        }
     };
 
     // Restore system cursors if they were hidden
@@ -214,8 +230,12 @@ pub fn cleanup() {
 
             // 1. First try to restore original cursors if we saved them
             let original_cursors_opt = {
-                let mut guard = ORIGINAL_CURSORS.lock().unwrap();
+                if let Some(mut guard) = safe_lock(&ORIGINAL_CURSORS, "restoring original cursors") {
                     guard.take()
+                } else {
+                    eprintln!("Failed to access original cursors for restoration");
+                    None
+                }
             };
 
             if let Some(original_cursors) = original_cursors_opt {
@@ -268,7 +288,13 @@ pub fn cleanup() {
     }
 
     // Destroy the custom cursor if it exists
-    let custom_cursor_to_destroy = CUSTOM_CURSOR.lock().unwrap().take();
+    let custom_cursor_to_destroy = if let Some(mut guard) = safe_lock(&CUSTOM_CURSOR, "destroying custom cursor") {
+        guard.take()
+    } else {
+        eprintln!("Failed to access custom cursor for cleanup");
+        None
+    };
+
     if let Some(cursor_wrapper) = custom_cursor_to_destroy {
         unsafe {
             if !cursor_wrapper.0.is_null() {
@@ -278,10 +304,18 @@ pub fn cleanup() {
     }
 
     // Reset the last known cursor position
-    *LAST_CURSOR_POS.lock().unwrap() = None;
+    if let Some(mut guard) = safe_lock(&LAST_CURSOR_POS, "resetting cursor position") {
+        *guard = None;
+    } else {
+        eprintln!("Failed to reset cursor position during cleanup");
+    }
 
     // Clear the current cursor image
-    *CURRENT_CURSOR_IMAGE.lock().unwrap() = None;
+    if let Some(mut guard) = safe_lock(&CURRENT_CURSOR_IMAGE, "clearing cursor image") {
+        *guard = None;
+    } else {
+        eprintln!("Failed to clear cursor image during cleanup");
+    }
 
     // Unregister control handler
     if CTRL_HANDLER_REGISTERED.load(Ordering::SeqCst) {
@@ -333,7 +367,11 @@ pub fn hide_system_cursor() -> bool {
 
     // Store original cursors for restoration
     if !original_cursors.is_empty() {
-        *ORIGINAL_CURSORS.lock().unwrap() = Some(original_cursors);
+        if let Some(mut guard) = safe_lock(&ORIGINAL_CURSORS, "storing original cursors") {
+            *guard = Some(original_cursors);
+        } else {
+            eprintln!("Failed to store original cursors for restoration");
+        }
     } else {
         eprintln!("No original cursors were saved!");
     }
@@ -368,7 +406,11 @@ pub fn update_cursor_info(cursor_info: &mut crate::platform::types::CursorInfo)
     };
 
     // Store the image in the global state for reference
-    *CURRENT_CURSOR_IMAGE.lock().unwrap() = Some(image.clone());
+    if let Some(mut guard) = safe_lock(&CURRENT_CURSOR_IMAGE, "storing cursor image") {
+        *guard = Some(image.clone());
+    } else {
+        eprintln!("Failed to store cursor image in global state");
+    }
 
     unsafe {
         // Create a new cursor first before destroying the old one
@@ -385,7 +427,7 @@ pub fn update_cursor_info(cursor_info: &mut crate::platform::types::CursorInfo)
             let success = apply_cursor_to_all_system_cursors(new_cursor_wrapper.0);
 
             // Now that the new cursor is applied, we can clean up the old one
-            let mut cursor_guard = CUSTOM_CURSOR.lock().unwrap();
+            if let Some(mut cursor_guard) = safe_lock(&CUSTOM_CURSOR, "updating custom cursor") {
                 if let Some(old_cursor) = cursor_guard.take() {
                     // Only destroy the old cursor after the new one is applied
                     DestroyIcon(old_cursor.0);
@@ -393,6 +435,12 @@ pub fn update_cursor_info(cursor_info: &mut crate::platform::types::CursorInfo)
 
                 // Store the new cursor
                 *cursor_guard = Some(new_cursor_wrapper);
+            } else {
+                eprintln!("Failed to update custom cursor - mutex lock failed");
+                // Clean up the new cursor since we can't store it
+                DestroyIcon(new_cursor_wrapper.0);
+                return false;
+            }
 
             // Update the cached cursor in CursorInfo
             #[cfg(windows)]
@@ -417,12 +465,15 @@ pub fn update_cursor_info(cursor_info: &mut crate::platform::types::CursorInfo)
             #[cfg(windows)]
             if let Some(cached_cursor) = &cursor_info.win_cursor {
                 if !cached_cursor.handle.is_null() {
-                    let mut cursor_guard = CUSTOM_CURSOR.lock().unwrap();
+                    if let Some(mut cursor_guard) = safe_lock(&CUSTOM_CURSOR, "using cached cursor fallback") {
                         // Convert WinCursorWrapper to SyncHCURSOR
                         let sync_cursor = super::types::SyncHCURSOR(cached_cursor.handle);
                         *cursor_guard = Some(sync_cursor);
                         SetCursor(cached_cursor.handle);
                         return true;
+                    } else {
+                        eprintln!("Failed to use cached cursor fallback - mutex lock failed");
+                    }
                 }
             }