From f30934ab4f95b6e0578cc4d0f613a3d59d4e37e7 Mon Sep 17 00:00:00 2001
From: Jun Wu <quark@fb.com>
Date: Thu, 10 Dec 2020 12:32:23 -0800
Subject: [PATCH] dag: require Send and Sync on Persist::Lock

Summary: This will make async migrating easier.

Reviewed By: sfilipco

Differential Revision: D25350913

fbshipit-source-id: f33bdc0023ae0cc49601504b811991ea6813ff9e
---
 eden/scm/lib/dag/src/ops.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eden/scm/lib/dag/src/ops.rs b/eden/scm/lib/dag/src/ops.rs
index 086ff9465c..d1e200066c 100644
--- a/eden/scm/lib/dag/src/ops.rs
+++ b/eden/scm/lib/dag/src/ops.rs
@@ -313,7 +313,7 @@ pub trait IdMapSnapshot {
 /// Describes how to persist state to disk.
 pub trait Persist {
     /// Return type of `lock()`.
-    type Lock;
+    type Lock: Send + Sync;
 
     /// Obtain an exclusive lock for writing.
     /// This should prevent other writers.