| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Data.GI.Base.GHashTable
Description
Machinery for some basic support of GHashTable.
The GLib GHashTable implementation requires two things: we need to
"pack" a datatype into a pointer (for datatypes that are represented
by pointers this is the trivial operation, for integers it is not, and
GLib has some helper macros).
We also need to be able to hash and check for equality different datatypes.
Synopsis
- type GHashFunc a = FunPtr (PtrWrapped a -> IO Word32)
- type GEqualFunc a = FunPtr (PtrWrapped a -> PtrWrapped a -> IO Int32)
- gDirectHash :: GHashFunc (Ptr a)
- gDirectEqual :: GEqualFunc (Ptr a)
- ptrPackPtr :: Ptr a -> PtrWrapped (Ptr a)
- ptrUnpackPtr :: PtrWrapped (Ptr a) -> Ptr a
- gStrHash :: GHashFunc CString
- gStrEqual :: GEqualFunc CString
- cstringPackPtr :: CString -> PtrWrapped CString
- cstringUnpackPtr :: PtrWrapped CString -> CString
Documentation
type GHashFunc a = FunPtr (PtrWrapped a -> IO Word32) Source #
A pointer to a hashing function on the C side.
type GEqualFunc a = FunPtr (PtrWrapped a -> PtrWrapped a -> IO Int32) Source #
A pointer to an equality checking function on the C side.
gDirectEqual :: GEqualFunc (Ptr a) Source #
Check whether two pointers are equal.
ptrPackPtr :: Ptr a -> PtrWrapped (Ptr a) Source #
Pack a Ptr into a PtrWrapped Ptr.
ptrUnpackPtr :: PtrWrapped (Ptr a) -> Ptr a Source #
Extract a Ptr from a PtrWrapped Ptr.