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{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveGeneric #-}
module GHC.Exts.Heap.ClosureTypes
( ClosureType(..)
, closureTypeHeaderSize
) where
import Prelude -- See note [Why do we import Prelude here?]
import GHC.Generics
{- ---------------------------------------------
-- Enum representing closure types
-- This is a mirror of:
-- includes/rts/storage/ClosureTypes.h
-- ---------------------------------------------}
data ClosureType
= INVALID_OBJECT
| CONSTR
| CONSTR_1_0
| CONSTR_0_1
| CONSTR_2_0
| CONSTR_1_1
| CONSTR_0_2
| CONSTR_NOCAF
| FUN
| FUN_1_0
| FUN_0_1
| FUN_2_0
| FUN_1_1
| FUN_0_2
| FUN_STATIC
| THUNK
| THUNK_1_0
| THUNK_0_1
| THUNK_2_0
| THUNK_1_1
| THUNK_0_2
| THUNK_STATIC
| THUNK_SELECTOR
| BCO
| AP
| PAP
| AP_STACK
| IND
| IND_STATIC
| RET_BCO
| RET_SMALL
| RET_BIG
| RET_FUN
| UPDATE_FRAME
| CATCH_FRAME
| UNDERFLOW_FRAME
| STOP_FRAME
| BLOCKING_QUEUE
| BLACKHOLE
| MVAR_CLEAN
| MVAR_DIRTY
| TVAR
| ARR_WORDS
| MUT_ARR_PTRS_CLEAN
| MUT_ARR_PTRS_DIRTY
| MUT_ARR_PTRS_FROZEN_DIRTY
| MUT_ARR_PTRS_FROZEN_CLEAN
| MUT_VAR_CLEAN
| MUT_VAR_DIRTY
| WEAK
| PRIM
| MUT_PRIM
| TSO
| STACK
| TREC_CHUNK
| ATOMICALLY_FRAME
| CATCH_RETRY_FRAME
| CATCH_STM_FRAME
| WHITEHOLE
| SMALL_MUT_ARR_PTRS_CLEAN
| SMALL_MUT_ARR_PTRS_DIRTY
| SMALL_MUT_ARR_PTRS_FROZEN_DIRTY
| SMALL_MUT_ARR_PTRS_FROZEN_CLEAN
| COMPACT_NFDATA
| N_CLOSURE_TYPES
deriving (Enum, Eq, Ord, Show, Generic)
-- | Return the size of the closures header in words
closureTypeHeaderSize :: ClosureType -> Int
closureTypeHeaderSize closType =
case closType of
ct | THUNK <= ct && ct <= THUNK_0_2 -> thunkHeader
ct | ct == THUNK_SELECTOR -> thunkHeader
ct | ct == AP -> thunkHeader
ct | ct == AP_STACK -> thunkHeader
_ -> header
where
header = 1 + prof
thunkHeader = 2 + prof
#if defined(PROFILING)
prof = 2
#else
prof = 0
#endif
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