From fbacc24b997f1503b953a4a83901b48c896c900c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas <niklas.fiekas@backscattering.de>
Date: Wed, 5 Jun 2024 22:29:07 +0200
Subject: [PATCH] madvise on linux only

---
 src/filesystem.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/filesystem.rs b/src/filesystem.rs
index 62caf2a..1cb9e85 100644
--- a/src/filesystem.rs
+++ b/src/filesystem.rs
@@ -147,7 +147,7 @@ pub(crate) mod os {
 
 #[cfg(feature = "mmap")]
 pub(crate) mod mmap {
-    use memmap2::{Advice, Mmap, MmapOptions};
+    use memmap2::{Mmap, MmapOptions};
 
     use super::*;
 
@@ -172,9 +172,13 @@ pub(crate) mod mmap {
 
         fn open(&self, path: &Path) -> io::Result<Box<dyn RandomAccessFile>> {
             let file = fs::File::open(path)?;
+
             // Safety: Contract forwarded to MmapFilesystem::new().
             let mmap = unsafe { MmapOptions::new().map(&file)? };
-            mmap.advise(Advice::Random)?;
+
+            #[cfg(unix)]
+            mmap.advise(memmap2::Advice::Random)?;
+
             Ok(Box::new(MmapRandomAccessFile { mmap }))
         }
     }