Foundation.IO.FileMap

Note that the memory mapping is handled by the system, not at the haskell level. The system can modify the content of the memory as any moment under your feet.

It also have the limitation of your system, no emulation or nice handling of all those corners cases is attempted here.

for example mapping a large file (> 4G), on a 32 bits system is likely to just fail or returns inconsistent result.

In doubt, use readFile or other simple routine that brings the content of the file in IO.

Documentation

fileMapRead :: FilePath -> IO (UArray Word8)

Map in memory the whole content of a file.

Once the array goes out of scope, the memory get (eventually) unmap

fileMapReadWith :: FilePath -> (UArray Word8 -> IO a) -> IO a

Map in memory the whole content of a file,