From 93679f8d48ea5606fde97884eef81d962232be79 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 2 Jun 2022 12:50:45 -0400
Subject: [PATCH] Reduce potential surprise in DeferringAsyncTaskQueue::flush.

---
 Concurrency/AsyncTaskQueue.cpp | 5 +++++
 Concurrency/AsyncTaskQueue.hpp | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/Concurrency/AsyncTaskQueue.cpp b/Concurrency/AsyncTaskQueue.cpp
index d4f2f84a5..798683c39 100644
--- a/Concurrency/AsyncTaskQueue.cpp
+++ b/Concurrency/AsyncTaskQueue.cpp
@@ -103,3 +103,8 @@ void DeferringAsyncTaskQueue::perform() {
 		}
 	});
 }
+
+void DeferringAsyncTaskQueue::flush() {
+	perform();
+	AsyncTaskQueue::flush();
+}
diff --git a/Concurrency/AsyncTaskQueue.hpp b/Concurrency/AsyncTaskQueue.hpp
index 7e48a404e..da5d052c8 100644
--- a/Concurrency/AsyncTaskQueue.hpp
+++ b/Concurrency/AsyncTaskQueue.hpp
@@ -87,6 +87,11 @@ class DeferringAsyncTaskQueue: public AsyncTaskQueue {
 		*/
 		void perform();
 
+		/*!
+			Blocks the caller until all previously-enqueud functions have completed.
+		*/
+		void flush();
+
 	private:
 		// TODO: this is a shared_ptr because of the issues capturing moveables in C++11;
 		// switch to a unique_ptr if/when adapting to C++14