{-# LINE 1 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
module GHC.Internal.Heap.InfoTable
    ( module GHC.Internal.Heap.InfoTable.Types
    , itblSize
    , peekItbl
    , pokeItbl
    ) where



import GHC.Internal.Base
import GHC.Internal.Real
import GHC.Internal.Enum

import GHC.Internal.Heap.InfoTable.Types

{-# LINE 21 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
import GHC.Internal.Data.Either
import GHC.Internal.Foreign.Marshal.Array

{-# LINE 24 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
import GHC.Internal.Foreign.Ptr
import GHC.Internal.Foreign.Storable

-------------------------------------------------------------------------
-- Profiling specific code
--
-- The functions that follow all rely on PROFILING. They are duplicated in
-- ghc-heap/GHC/Exts/Heap/InfoTableProf.hsc where PROFILING is defined. This
-- allows hsc2hs to generate values for both profiling and non-profiling builds.

-- | Read an InfoTable from the heap into a haskell type.
-- WARNING: This code assumes it is passed a pointer to a "standard" info
-- table. If tables_next_to_code is disabled, it will look 1 word before the
-- start for the entry field.
peekItbl :: Ptr StgInfoTable -> IO StgInfoTable
peekItbl :: Ptr StgInfoTable -> IO StgInfoTable
peekItbl Ptr StgInfoTable
a0 = do

{-# LINE 44 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  let ptr :: Ptr StgInfoTable
ptr = Ptr StgInfoTable
a0
      entry' :: Maybe a
entry' = Maybe a
forall a. Maybe a
Nothing

{-# LINE 47 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  ptrs'   <- ((\hsc_ptr -> peekByteOff hsc_ptr 0)) ptr
{-# LINE 48 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  nptrs'  <- ((\hsc_ptr -> peekByteOff hsc_ptr 4)) ptr
{-# LINE 49 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  tipe'   <- ((\hsc_ptr -> peekByteOff hsc_ptr 8)) ptr
{-# LINE 50 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  srtlen' <- ((\hsc_ptr -> peekByteOff hsc_ptr 12)) a0
{-# LINE 51 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  return StgInfoTable
    { entry  = entry'
    , ptrs   = ptrs'
    , nptrs  = nptrs'
    , tipe   = toEnum (fromIntegral (tipe' :: HalfWord))
    , srtlen = srtlen'
    , code   = Nothing
    }

pokeItbl :: Ptr StgInfoTable -> StgInfoTable -> IO ()
pokeItbl :: Ptr StgInfoTable -> StgInfoTable -> IO ()
pokeItbl Ptr StgInfoTable
a0 StgInfoTable
itbl = do

{-# LINE 65 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  ((\Ptr StgInfoTable
hsc_ptr -> Ptr StgInfoTable -> Int -> HalfWord -> IO ()
forall b. Ptr b -> Int -> HalfWord -> IO ()
forall a b. Storable a => Ptr b -> Int -> a -> IO ()
pokeByteOff Ptr StgInfoTable
hsc_ptr Int
0)) Ptr StgInfoTable
a0 (StgInfoTable -> HalfWord
ptrs StgInfoTable
itbl)
{-# LINE 66 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  ((\hsc_ptr -> pokeByteOff hsc_ptr 4)) a0 (nptrs itbl)
{-# LINE 67 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  ((\hsc_ptr -> pokeByteOff hsc_ptr 8)) a0 (toHalfWord (fromEnum (tipe itbl)))
{-# LINE 68 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  ((\hsc_ptr -> pokeByteOff hsc_ptr 12)) a0 (srtlen itbl)
{-# LINE 69 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}

{-# LINE 70 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  let code_offset = a0 `plusPtr` ((16))
{-# LINE 71 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  case code itbl of
    Nothing -> return ()
    Just (Left xs) -> pokeArray code_offset xs
    Just (Right xs) -> pokeArray code_offset xs

{-# LINE 76 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}
  where
    toHalfWord :: Int -> HalfWord
    toHalfWord :: Int -> HalfWord
toHalfWord Int
i = Int -> HalfWord
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
i

-- | Size in bytes of a standard InfoTable
itblSize :: Int
itblSize :: Int
itblSize = ((Int
16))
{-# LINE 83 "libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc" #-}