Implement I/O safety traits

src/file.rs

@@ -289,6 +289,22 @@ impl AsRawHandle for RandomAccessFile {
     }
 }
 
+#[cfg(any(unix, target_os = "wasi"))]
+impl AsFd for RandomAccessFile {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.0.as_fd()
+    }
+}
+
+#[cfg(target_os = "windows")]
+impl AsHandle for RandomAccessFile {
+    #[inline]
+    fn as_handle(&self) -> BorrowedHandle<'_> {
+        self.0.as_handle()
+    }
+}
+
 #[cfg(any(unix, target_os = "wasi"))]
 impl FromRawFd for RandomAccessFile {
     #[inline]
@@ -305,6 +321,22 @@ impl FromRawHandle for RandomAccessFile {
     }
 }
 
+#[cfg(any(unix, target_os = "wasi"))]
+impl From<OwnedFd> for RandomAccessFile {
+    #[inline]
+    fn from(fd: OwnedFd) -> Self {
+        Self::from(File::from(fd))
+    }
+}
+
+#[cfg(target_os = "windows")]
+impl From<OwnedHandle> for RandomAccessFile {
+    #[inline]
+    fn from(handle: OwnedHandle) -> Self {
+        Self::from(File::from(handle))
+    }
+}
+
 #[cfg(any(unix, target_os = "wasi"))]
 impl IntoRawFd for RandomAccessFile {
     #[inline]
@@ -321,6 +353,22 @@ impl IntoRawHandle for RandomAccessFile {
     }
 }
 
+#[cfg(any(unix, target_os = "wasi"))]
+impl From<RandomAccessFile> for OwnedFd {
+    #[inline]
+    fn from(f: RandomAccessFile) -> Self {
+        f.0.into()
+    }
+}
+
+#[cfg(target_os = "windows")]
+impl From<RandomAccessFile> for OwnedHandle {
+    #[inline]
+    fn from(f: RandomAccessFile) -> Self {
+        f.0.into()
+    }
+}
+
 /// A file wrapper that is safe to use concurrently.
 ///
 /// This wrapper exists because [`std::fs::File`] uses a single cursor, so
@@ -488,6 +536,22 @@ impl AsRawHandle for SyncFile {
     }
 }
 
+#[cfg(any(unix, target_os = "wasi"))]
+impl AsFd for SyncFile {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.0.get_ref().as_fd()
+    }
+}
+
+#[cfg(target_os = "windows")]
+impl AsHandle for SyncFile {
+    #[inline]
+    fn as_handle(&self) -> BorrowedHandle<'_> {
+        self.0.get_ref().as_handle()
+    }
+}
+
 #[cfg(any(unix, target_os = "wasi"))]
 impl FromRawFd for SyncFile {
     #[inline]
@@ -504,6 +568,22 @@ impl FromRawHandle for SyncFile {
     }
 }
 
+#[cfg(any(unix, target_os = "wasi"))]
+impl From<OwnedFd> for SyncFile {
+    #[inline]
+    fn from(fd: OwnedFd) -> Self {
+        Self::from(File::from(fd))
+    }
+}
+
+#[cfg(target_os = "windows")]
+impl From<OwnedHandle> for SyncFile {
+    #[inline]
+    fn from(handle: OwnedHandle) -> Self {
+        Self::from(File::from(handle))
+    }
+}
+
 impl fmt::Debug for SyncFile {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("SyncFile")