Copyright	(c) 2019 Composewell Technologies
License	BSD3
Maintainer	streamly@composewell.com
Stability	experimental
Portability	GHC
Safe Haskell	None
Language	Haskell2010

Streamly.Internal.FileSystem.FDIO

Description

Low level IO routines interfacing the operating system.

Synopsis

write :: FD -> Ptr Word8 -> Int -> CSize -> IO CInt
writeAll :: FD -> Ptr Word8 -> Int -> IO ()
data IOVec = IOVec {
- iovBase :: !(Ptr Word8)
- iovLen :: !Word64
}
writev :: FD -> Ptr IOVec -> Int -> IO CInt
writevAll :: FD -> Ptr IOVec -> Int -> IO ()

Documentation

write :: FD -> Ptr Word8 -> Int -> CSize -> IO CInt Source #

write FD buffer offset length tries to write data on the given filesystem fd (cannot be a socket) up to sepcified length starting from the given offset in the buffer. The write will not block the OS thread, it may suspend the Haskell thread until write can proceed. Returns the actual amount of data written.

writeAll :: FD -> Ptr Word8 -> Int -> IO () Source #

Keep writing in a loop until all data in the buffer has been written.

data IOVec Source #

Constructors

IOVec
Fields iovBase :: !(Ptr Word8) iovLen :: !Word64

Instances

Instances details

Eq IOVec Source #
Instance details Defined in Streamly.Internal.FileSystem.IOVec Methods (==) :: IOVec -> IOVec -> Bool # (/=) :: IOVec -> IOVec -> Bool #
Show IOVec Source #
Instance details Defined in Streamly.Internal.FileSystem.IOVec Methods showsPrec :: Int -> IOVec -> ShowS # show :: IOVec -> String # showList :: [IOVec] -> ShowS #
Storable IOVec Source #
Instance details Defined in Streamly.Internal.FileSystem.IOVec Methods sizeOf :: IOVec -> Int # alignment :: IOVec -> Int # peekElemOff :: Ptr IOVec -> Int -> IO IOVec # pokeElemOff :: Ptr IOVec -> Int -> IOVec -> IO () # peekByteOff :: Ptr b -> Int -> IO IOVec # pokeByteOff :: Ptr b -> Int -> IOVec -> IO () # peek :: Ptr IOVec -> IO IOVec # poke :: Ptr IOVec -> IOVec -> IO () #

writev :: FD -> Ptr IOVec -> Int -> IO CInt Source #

write FD iovec count tries to write data on the given filesystem fd (cannot be a socket) from an iovec with specified number of entries. The write will not block the OS thread, it may suspend the Haskell thread until write can proceed. Returns the actual amount of data written.

writevAll :: FD -> Ptr IOVec -> Int -> IO () Source #

Keep writing an iovec in a loop until all the iovec entries are written.