refactor(ext/fs): `deno_fs::FileSystem` - conditional `Send + Sync` (#18993)

This allows for having a conditional `Send + Sync` on the file system trait for Deploy.

1 files changed, 22 insertions, 0 deletions

diff --git a/ext/fs/sync.rs b/ext/fs/sync.rs
new file mode 100644
index 000000000..c43850c28
--- /dev/null
+++ b/ext/fs/sync.rs
@@ -0,0 +1,22 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+pub use inner::*;
+
+#[cfg(feature = "sync_fs")]
+mod inner {
+  #![allow(clippy::disallowed_types)]
+  pub use std::sync::Arc as MaybeArc;
+
+  pub use core::marker::Send as MaybeSend;
+  pub use core::marker::Sync as MaybeSync;
+}
+
+#[cfg(not(feature = "sync_fs"))]
+mod inner {
+  pub use std::rc::Rc as MaybeArc;
+
+  pub trait MaybeSync {}
+  impl<T> MaybeSync for T where T: ?Sized {}
+  pub trait MaybeSend {}
+  impl<T> MaybeSend for T where T: ?Sized {}
+}