call madvise only when mmap result is valid

arvidn · Dec 9, 2024 · 2287b65 · 2287b65
1 parent 1e0a00e
commit 2287b65
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/mmap.cpp b/src/mmap.cpp
@@ -185,7 +185,7 @@ file_mapping::file_mapping(file_handle file, open_mode_t const mode, std::int64_
 	}
 
 #if TORRENT_USE_MADVISE
-	if (file_size > 0)
+	if (m_mapping != nullptr && m_mapping != map_failed)
 	{
 		int const advise = ((mode & open_mode::sequential_access) ? MADV_SEQUENTIAL : 0)
 #ifdef MADV_DONTDUMP