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Diffstat (limited to 'src/Result.hs')
-rw-r--r-- | src/Result.hs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/Result.hs b/src/Result.hs new file mode 100644 index 0000000..dfd3b9f --- /dev/null +++ b/src/Result.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 Result where + +import Control.Exception (assert) +import Foreign (throwIf_) +import Foreign.C.Types + +alwaysSucceeds :: IO CInt -> IO () +alwaysSucceeds f = do + r <- f + assert (r == 1) (return ()) + +requireSuccess :: IO CInt -> IO () +requireSuccess f = throwIf_ (/= 1) (const "BoringSSL failure") f |