Flush CValidationInterface callbacks prior to destruction

Note that the CScheduler thread cant be running at this point,
it has already been stopped with the rest of the init threadgroup.
Thus, just calling any remaining loose callbacks during Shutdown()
is sane.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index a76a87e10a..35bf0da4be 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -191,3 +191,12 @@ void SingleThreadedSchedulerClient::AddToProcessQueue(std::function<void (void)>
     }
     MaybeScheduleProcessQueue();
 }
+
+void SingleThreadedSchedulerClient::EmptyQueue() {
+    bool should_continue = true;
+    while (should_continue) {
+        ProcessQueue();
+        LOCK(m_cs_callbacks_pending);
+        should_continue = !m_callbacks_pending.empty();
+    }
+}