From b2b0f85b7dc2ab04f1bafeec0992aa34a4313467 Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Tue, 31 Mar 2020 15:16:07 -0400
Subject: [PATCH] common: scope_exit: Implement mechanism for canceling a scope
 exit.

---
 src/common/scope_exit.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/common/scope_exit.h b/src/common/scope_exit.h
index 1176a72b19..68ef5f197e 100644
--- a/src/common/scope_exit.h
+++ b/src/common/scope_exit.h
@@ -12,10 +12,17 @@ template <typename Func>
 struct ScopeExitHelper {
     explicit ScopeExitHelper(Func&& func) : func(std::move(func)) {}
     ~ScopeExitHelper() {
-        func();
+        if (active) {
+            func();
+        }
+    }
+
+    void Cancel() {
+        active = false;
     }
 
     Func func;
+    bool active{true};
 };
 
 template <typename Func>