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Diffstat (limited to 'libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc')
| -rw-r--r-- | libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc b/libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc new file mode 100644 index 0000000000..d8666d6b1d --- /dev/null +++ b/libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc @@ -0,0 +1,37 @@ +module GHC.Exts.Heap.InfoTable.Types + ( StgInfoTable(..) + , EntryFunPtr + , HalfWord + , ItblCodes + ) where + +#include "Rts.h" + +import GHC.Exts.Heap.ClosureTypes +import Foreign + +type ItblCodes = Either [Word8] [Word32] + +#include "ghcautoconf.h" +-- Ultra-minimalist version specially for constructors +#if SIZEOF_VOID_P == 8 +type HalfWord = Word32 +#elif SIZEOF_VOID_P == 4 +type HalfWord = Word16 +#else +#error Unknown SIZEOF_VOID_P +#endif + +type EntryFunPtr = FunPtr (Ptr () -> IO (Ptr ())) + +-- | This is a somewhat faithful representation of an info table. See +-- <http://hackage.haskell.org/trac/ghc/browser/includes/rts/storage/InfoTables.h> +-- for more details on this data structure. +data StgInfoTable = StgInfoTable { + entry :: Maybe EntryFunPtr, -- Just <=> not ghciTablesNextToCode + ptrs :: HalfWord, + nptrs :: HalfWord, + tipe :: ClosureType, + srtlen :: HalfWord, + code :: Maybe ItblCodes -- Just <=> ghciTablesNextToCode + } deriving (Show) |