diff options
author | Vincent Ambo <tazjin@google.com> | 2019-07-04T10·18+0100 |
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committer | Vincent Ambo <tazjin@google.com> | 2019-07-04T10·18+0100 |
commit | f723b8b878a3c4a4687b9e337a875500bebb39b1 (patch) | |
tree | e85204cf042c355e90cff61c111e7d8cd15df311 /third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs | |
parent | 2eb1dc26e42ffbdc168f05ef744bd4b4f3e4c36f (diff) |
feat(third_party/bazel): Check in rules_haskell from Tweag r/17
Diffstat (limited to 'third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs')
-rw-r--r-- | third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs b/third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs new file mode 100644 index 000000000000..69a46d84215b --- /dev/null +++ b/third_party/bazel/rules_haskell/examples/vector/Data/Vector/Storable/Internal.hs @@ -0,0 +1,33 @@ +-- | +-- Module : Data.Vector.Storable.Internal +-- Copyright : (c) Roman Leshchinskiy 2009-2010 +-- License : BSD-style +-- +-- Maintainer : Roman Leshchinskiy <rl@cse.unsw.edu.au> +-- Stability : experimental +-- Portability : non-portable +-- +-- Ugly internal utility functions for implementing 'Storable'-based vectors. +-- + +module Data.Vector.Storable.Internal ( + getPtr, setPtr, updPtr +) where + +import Foreign.ForeignPtr +import Foreign.Ptr +import GHC.ForeignPtr ( ForeignPtr(..) ) +import GHC.Ptr ( Ptr(..) ) + +getPtr :: ForeignPtr a -> Ptr a +{-# INLINE getPtr #-} +getPtr (ForeignPtr addr _) = Ptr addr + +setPtr :: ForeignPtr a -> Ptr a -> ForeignPtr a +{-# INLINE setPtr #-} +setPtr (ForeignPtr _ c) (Ptr addr) = ForeignPtr addr c + +updPtr :: (Ptr a -> Ptr a) -> ForeignPtr a -> ForeignPtr a +{-# INLINE updPtr #-} +updPtr f (ForeignPtr p c) = case f (Ptr p) of { Ptr q -> ForeignPtr q c } + |