--- | as 'throwErrnoIfRetry', but checks for operations that would block and
--- executes an alternative action before retrying in that case.
+-- | as 'throwErrnoIfRetry', but additionlly if the operation
+-- yields the error code 'eAGAIN' or 'eWOULDBLOCK', an alternative
+-- action is executed before retrying.