fixed win32 version's handling of BrokenPipeError

Author: hokiedsp

src/namedpipe/_win32.py

@@ -230,10 +230,15 @@ def readinto(self, b: WritableBuffer) -> Union[int, None]:
                 hr, res = win32file.ReadFile(self.handle, size - nread)
                 if hr in (winerror.ERROR_MORE_DATA, winerror.ERROR_IO_PENDING):
                     raise _win_error(hr)
-            except pywintypes.error:
-                if win32api.GetLastError() == winerror.ERROR_BROKEN_PIPE:
-                    break
-                raise
+            except pywintypes.error as e:
+                if e.args[0]==109: # broken pipe error
+                    self.close()
+                    if nread:
+                        # return already acquired data
+                        break
+                    raise BrokenPipeError(*e.args)
+                else:
+                    raise e
             if not len(res):
                 break
             nnext = nread + len(res)