1 files changed, 35 insertions, 0 deletions
diff --git a/dom/base/TimeoutBudgetManager.cpp b/dom/base/TimeoutBudgetManager.cpp
new file mode 100644
index 0000000000..0fb9597df8
--- /dev/null
+++ b/dom/base/TimeoutBudgetManager.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "TimeoutBudgetManager.h"
+
+#include "mozilla/dom/Timeout.h"
+
+namespace mozilla::dom {
+
+/* static */ TimeoutBudgetManager& TimeoutBudgetManager::Get() {
+  static TimeoutBudgetManager gTimeoutBudgetManager;
+  return gTimeoutBudgetManager;
+}
+
+void TimeoutBudgetManager::StartRecording(const TimeStamp& aNow) {
+  mStart = aNow;
+}
+
+void TimeoutBudgetManager::StopRecording() { mStart = TimeStamp(); }
+
+TimeDuration TimeoutBudgetManager::RecordExecution(const TimeStamp& aNow,
+                                                   const Timeout* aTimeout) {
+  if (!mStart) {
+    // If we've started a sync operation mStart might be null, in
+    // which case we should not record this piece of execution.
+    return TimeDuration();
+  }
+
+  return aNow - mStart;
+}
+
+}  // namespace mozilla::dom