System.ZMQ4.Internal.Error

We use our own functions for throwing exceptions in order to get the actual error message via zmq_strerror. 0MQ defines additional error numbers besides those defined by the operating system, so zmq_strerror should be used in preference to strerror which is used by the standard throw* functions in Error.

Warning: This is an internal module and subject to change without notice.

Documentation

data ZMQError

ZMQError encapsulates information about errors, which occur when using the native 0MQ API, such as error number and message.

Constructors

ZMQError

Fields

• errno :: Int

  Error number value.

• source :: String

  Source where this error originates from.

• message :: String

  Actual error message.

Instances

Eq ZMQError

Methods

(==) :: ZMQError -> ZMQError -> Bool

(/=) :: ZMQError -> ZMQError -> Bool

Ord ZMQError

Methods

compare :: ZMQError -> ZMQError -> Ordering

(<) :: ZMQError -> ZMQError -> Bool

(<=) :: ZMQError -> ZMQError -> Bool

(>) :: ZMQError -> ZMQError -> Bool

(>=) :: ZMQError -> ZMQError -> Bool

max :: ZMQError -> ZMQError -> ZMQError

min :: ZMQError -> ZMQError -> ZMQError

Show ZMQError

Methods

showsPrec :: Int -> ZMQError -> ShowS

show :: ZMQError -> String

showList :: [ZMQError] -> ShowS

Exception ZMQError

Methods

toException :: ZMQError -> SomeException

fromException :: SomeException -> Maybe ZMQError

displayException :: ZMQError -> String

throwError :: String -> IO a

throwIf :: (a -> Bool) -> String -> IO a -> IO a

throwIf_ :: (a -> Bool) -> String -> IO a -> IO ()

throwIfRetry :: (a -> Bool) -> String -> IO a -> IO a

throwIfRetry_ :: (a -> Bool) -> String -> IO a -> IO ()

throwIfMinus1 :: (Eq a, Num a) => String -> IO a -> IO a

throwIfMinus1_ :: (Eq a, Num a) => String -> IO a -> IO ()

throwIfNull :: String -> IO (Ptr a) -> IO (Ptr a)

throwIfMinus1Retry :: (Eq a, Num a) => String -> IO a -> IO a

throwIfMinus1Retry_ :: (Eq a, Num a) => String -> IO a -> IO ()

throwIfRetryMayBlock :: (a -> Bool) -> String -> IO a -> IO b -> IO a

throwIfRetryMayBlock_ :: (a -> Bool) -> String -> IO a -> IO b -> IO ()

throwIfMinus1RetryMayBlock :: (Eq a, Num a) => String -> IO a -> IO b -> IO a

throwIfMinus1RetryMayBlock_ :: (Eq a, Num a) => String -> IO a -> IO b -> IO ()

zmqErrnoMessage :: CInt -> IO String

zmqErrno :: IO Errno