io-uring: add readable/writable

src/io_uring/ops.rs

@@ -1,2 +1,21 @@
+use crate::{io_uring::IoUringError, utils::oserror::OsError};
+
 pub mod async_cancel;
+pub mod poll;
 pub mod write;
+
+pub type TaskResult<T> = Result<Result<T, OsError>, IoUringError>;
+
+pub trait TaskResultExt<T> {
+    fn merge(self) -> Result<T, IoUringError>;
+}
+
+impl<T> TaskResultExt<T> for TaskResult<T> {
+    fn merge(self) -> Result<T, IoUringError> {
+        match self {
+            Ok(Ok(t)) => Ok(t),
+            Ok(Err(e)) => Err(IoUringError::OsError(e)),
+            Err(e) => Err(e),
+        }
+    }
+}