alsa-core-0.5.0.1: Binding to the ALSA Library API (Exceptions).
Safe HaskellSafe-Inferred
LanguageHaskell98

Sound.ALSA.Exception

Description

ALSA does not distinguish between programming errors and runtime exceptions, which is sad, but we have to cope with it.

Synopsis

Documentation

data T #

Constructors

Cons 

Fields

Instances

Instances details
Show T # 
Instance details

Defined in Sound.ALSA.Exception

Methods

showsPrec :: Int -> T -> ShowS

show :: T -> String

showList :: [T] -> ShowS

Exception T # 
Instance details

Defined in Sound.ALSA.Exception

Methods

toException :: T -> SomeException

fromException :: SomeException -> Maybe T

displayException :: T -> String

checkResult :: Integral a => String -> a -> IO a #

checkResult_ :: Integral a => String -> a -> IO () #

checkResultMaybe :: String -> (CInt -> a) -> (CInt -> Maybe a) -> CInt -> IO a #

throw :: String -> Errno -> IO a #

catch :: IO a -> (T -> IO a) -> IO a #

catchErrno #

Arguments

:: Errno 
-> IO a

Action

-> IO a

Handler

-> IO a 

catchXRun #

Arguments

:: IO a

Action

-> IO a

Handler

-> IO a 

showErrno :: Errno -> String #

show :: T -> String #

rethrow :: IO a -> IO a #

Converts any T into an IOError. This produces better a error message than letting an uncaught T propagate to the top.

strerror :: Errno -> IO String #

Returns the message for an error code.

snd_strerror :: Errno -> IO CString #