File: stableptr001.hs

package info (click to toggle)
ghc 9.6.6-4
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 158,216 kB
  • sloc: haskell: 648,228; ansic: 81,656; cpp: 11,808; javascript: 8,444; sh: 5,831; fortran: 3,527; python: 3,277; asm: 2,523; makefile: 2,298; yacc: 1,570; lisp: 532; xml: 196; perl: 145; csh: 2
file content (19 lines) | stat: -rw-r--r-- 388 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 

module Main where

import Foreign

-- simple test for building/dereferencing stable ptrs

main
  = do  l <- mapM newStablePtr [1..100000]
        sum <- stable_sum l
        print sum

stable_sum :: [StablePtr Integer] -> IO Integer
stable_sum [] = return 0
stable_sum (x:xs)
  = do  x'  <- deRefStablePtr x
        freeStablePtr x
        xs' <- stable_sum xs
        return (x' + xs')