1 files changed, 43 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/test/time_controller.cc b/third_party/libwebrtc/api/test/time_controller.cc
new file mode 100644
index 0000000000..364dbc235d
--- /dev/null
+++ b/third_party/libwebrtc/api/test/time_controller.cc
@@ -0,0 +1,43 @@
+/*
+ *  Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "api/test/time_controller.h"
+
+namespace webrtc {
+std::unique_ptr<TaskQueueFactory> TimeController::CreateTaskQueueFactory() {
+  class FactoryWrapper final : public TaskQueueFactory {
+   public:
+    explicit FactoryWrapper(TaskQueueFactory* inner_factory)
+        : inner_(inner_factory) {}
+    std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
+        absl::string_view name,
+        Priority priority) const override {
+      return inner_->CreateTaskQueue(name, priority);
+    }
+
+   private:
+    TaskQueueFactory* const inner_;
+  };
+  return std::make_unique<FactoryWrapper>(GetTaskQueueFactory());
+}
+bool TimeController::Wait(const std::function<bool()>& condition,
+                          TimeDelta max_duration) {
+  // Step size is chosen to be short enough to not significantly affect latency
+  // in real time tests while being long enough to avoid adding too much load to
+  // the system.
+  const auto kStep = TimeDelta::Millis(5);
+  for (auto elapsed = TimeDelta::Zero(); elapsed < max_duration;
+       elapsed += kStep) {
+    if (condition())
+      return true;
+    AdvanceTime(kStep);
+  }
+  return condition();
+}
+}  // namespace webrtc