Move platform-specific code to separate directory

1 files changed, 20 insertions, 0 deletions

diff --git a/src/unix/Erebos/Storage/Platform.hs b/src/unix/Erebos/Storage/Platform.hs
new file mode 100644
index 0000000..2198f61
--- /dev/null
+++ b/src/unix/Erebos/Storage/Platform.hs
@@ -0,0 +1,20 @@
+{-# LANGUAGE CPP #-}
+
+module Erebos.Storage.Platform (
+    createFileExclusive,
+) where
+
+import System.IO
+import System.Posix.Files
+import System.Posix.IO
+
+createFileExclusive :: FilePath -> IO Handle
+createFileExclusive path = fdToHandle =<< do
+#if MIN_VERSION_unix(2,8,0)
+    openFd path WriteOnly defaultFileFlags
+        { creat = Just $ unionFileModes ownerReadMode ownerWriteMode
+        , exclusive = True
+        }
+#else
+    openFd path WriteOnly (Just $ unionFileModes ownerReadMode ownerWriteMode) (defaultFileFlags { exclusive = True })
+#endif