Storable package:array

module Data.Array.Storable
array
A storable array is an IO-mutable array which stores its contents in a contiguous memory block living in the C heap. Elements are stored according to the class Storable. You can obtain the pointer to the array contents to manipulate elements from languages like C. It is similar to IOUArray but slower. Its advantage is that it's compatible with C.
data StorableArray i e
array Data.Array.Storable Data.Array.Storable.Internals Data.Array.Storable.Safe
The array type
StorableArray :: i -> i -> Int -> !ForeignPtr e -> StorableArray i e
array Data.Array.Storable.Internals
touchStorableArray :: StorableArray i e -> IO ()
array Data.Array.Storable Data.Array.Storable.Internals Data.Array.Storable.Safe
If you want to use it afterwards, ensure that you touchStorableArray after the last use of the pointer, so the array is not freed too early.
withStorableArray :: StorableArray i e -> (Ptr e -> IO a) -> IO a
array Data.Array.Storable Data.Array.Storable.Internals Data.Array.Storable.Safe
The pointer to the array contents is obtained by withStorableArray. The idea is similar to ForeignPtr (used internally here). The pointer should be used only during execution of the IO action retured by the function passed as argument to withStorableArray.
unsafeForeignPtrToStorableArray :: Ix i => ForeignPtr e -> (i, i) -> IO (StorableArray i e)
array Data.Array.Storable.Internals Data.Array.Unsafe
Construct a StorableArray from an arbitrary ForeignPtr. It is the caller's responsibility to ensure that the ForeignPtr points to an area of memory sufficient for the specified bounds.