From 226c84a6e5464ca74468e690250227f70e8fa1c8 Mon Sep 17 00:00:00 2001 From: Benjamin Barenblat Date: Sat, 28 Apr 2018 17:03:04 -0700 Subject: Factor out common resource create/initialize/set-finalizer cycle --- src/Foreign/Ptr/CreateWithFinalizer.hs | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 src/Foreign/Ptr/CreateWithFinalizer.hs (limited to 'src/Foreign/Ptr/CreateWithFinalizer.hs') diff --git a/src/Foreign/Ptr/CreateWithFinalizer.hs b/src/Foreign/Ptr/CreateWithFinalizer.hs new file mode 100644 index 0000000..b1dd583 --- /dev/null +++ b/src/Foreign/Ptr/CreateWithFinalizer.hs @@ -0,0 +1,27 @@ +-- Copyright 2018 Google LLC +-- +-- Licensed under the Apache License, Version 2.0 (the "License"); you may not +-- use this file except in compliance with the License. You may obtain a copy of +-- the License at +-- +-- https://www.apache.org/licenses/LICENSE-2.0 +-- +-- Unless required by applicable law or agreed to in writing, software +-- distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +-- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +-- License for the specific language governing permissions and limitations under +-- the License. + +module Foreign.Ptr.CreateWithFinalizer (createWithFinalizer) where + +import Foreign + (FinalizerPtr, ForeignPtr, Ptr, Storable, addForeignPtrFinalizer, + mallocForeignPtr, withForeignPtr) + +createWithFinalizer :: + Storable a => (Ptr a -> IO ()) -> FinalizerPtr a -> IO (ForeignPtr a) +createWithFinalizer initialize finalize = do + fp <- mallocForeignPtr + withForeignPtr fp initialize + addForeignPtrFinalizer finalize fp + return fp -- cgit v1.2.3