blob: 51c364f7768698efa521e36692c8fcc48b92b7f5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
module GHC.Types.CostCentre.State
( CostCentreState
, newCostCentreState
, CostCentreIndex
, unCostCentreIndex
, getCCIndex
)
where
import GhcPrelude
import FastString
import FastStringEnv
import Data.Data
import Binary
-- | Per-module state for tracking cost centre indices.
--
-- See documentation of 'CostCentre.cc_flavour' for more details.
newtype CostCentreState = CostCentreState (FastStringEnv Int)
-- | Initialize cost centre state.
newCostCentreState :: CostCentreState
newCostCentreState = CostCentreState emptyFsEnv
-- | An index into a given cost centre module,name,flavour set
newtype CostCentreIndex = CostCentreIndex { unCostCentreIndex :: Int }
deriving (Eq, Ord, Data, Binary)
-- | Get a new index for a given cost centre name.
getCCIndex :: FastString
-> CostCentreState
-> (CostCentreIndex, CostCentreState)
getCCIndex nm (CostCentreState m) =
(CostCentreIndex idx, CostCentreState m')
where
m_idx = lookupFsEnv m nm
idx = maybe 0 id m_idx
m' = extendFsEnv m nm (idx + 1)
|
