Getting the FLAG from the winapi module.

Cargo.toml

@@ -24,8 +24,6 @@ rustc-serialize = "0.3"
 log = "0.3.6"
 combine = "2.2"
 tempdir = "0.3"
-
-
 bincode = "0.5"
 libc = {version = "0.2.20", optional=true}
 num_cpus = "1.2"
@@ -37,10 +35,12 @@ uuid = { version = "0.4", features = ["v4", "rustc-serialize"] }
 chan = "0.1"
 version = "2"
 crossbeam = "0.2"
-
 futures = "0.1.9"
 futures-cpupool = "0.1.2"
 
+[target.'cfg(windows)'.dependencies]
+winapi = "*"
+
 [dev-dependencies]
 rand = "0.3"
 

src/directory/mmap_directory.rs

@@ -23,6 +23,10 @@ use std::sync::RwLock;
 use std::sync::Weak;
 use tempdir::TempDir;
 
+#[cfg(windows)]
+use winapi::winbase::FILE_FLAG_BACKUP_SEMANTICS;
+
+
 
 fn open_mmap(full_path: &PathBuf) -> result::Result<Option<Arc<Mmap>>, FileError> {
     let convert_file_error = |err: io::Error| {
@@ -231,11 +235,9 @@ impl MmapDirectory {
         #[cfg(windows)]
         {
             use std::os::windows::fs::OpenOptionsExt;
-            const FILE_FLAG_BACKUP_SEMANTICS: u32 = 0x02000000;
-
             open_opts.write(true)
                 .custom_flags(FILE_FLAG_BACKUP_SEMANTICS);
-        };
+        }
 
         let fd = try!(open_opts.open(&self.root_path));
         try!(fd.sync_all());

src/lib.rs

@@ -51,6 +51,9 @@ extern crate futures_cpupool;
 #[cfg(feature="simdcompression")]
 extern crate libc;
 
+#[cfg(windows)]
+extern crate winapi;
+
 #[cfg(test)] extern crate test;
 #[cfg(test)] extern crate rand;