33 lines
1.2 KiB
Haskell
33 lines
1.2 KiB
Haskell
module Codec.Archive.Common ( actFree
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, actFreeCallback
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, hmemcpy
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) where
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import Codec.Archive.Foreign
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import Codec.Archive.Monad (ArchiveM, bracketM)
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import Control.Composition ((.**))
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import Control.Monad (void)
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import Control.Monad.IO.Class (MonadIO (..))
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import Foreign.C.Types (CSize (..))
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import Foreign.Ptr
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foreign import ccall memcpy :: Ptr a -- ^ Destination
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-> Ptr b -- ^ Source
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-> CSize -- ^ Size
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-> IO (Ptr a) -- ^ Pointer to destination
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hmemcpy :: Ptr a -> Ptr b -> CSize -> IO ()
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hmemcpy = void .** memcpy
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-- | Do something with an 'Archive' and then free it
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actFree :: IO (Ptr Archive)
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-> (Ptr Archive -> ArchiveM a)
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-> ArchiveM a
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actFree get = bracketM get archiveFree
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actFreeCallback :: MonadIO m
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=> (Ptr Archive -> m a)
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-> (Ptr Archive, IO ()) -- ^ 'Ptr' to an 'Archive' and an 'IO' action to clean up when done
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-> m a
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actFreeCallback fact (a, freeAct) = fact a <* liftIO (archiveFree a) <* liftIO freeAct
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