1 files changed, 38 insertions, 0 deletions
diff --git a/xpcom/threads/ThreadDelay.cpp b/xpcom/threads/ThreadDelay.cpp
new file mode 100644
index 0000000000..1c38e25510
--- /dev/null
+++ b/xpcom/threads/ThreadDelay.cpp
@@ -0,0 +1,38 @@
+/* -*- 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 "ThreadDelay.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/ChaosMode.h"
+
+#if defined(XP_WIN)
+#  include <windows.h>
+#else
+#  include <unistd.h>
+#endif
+
+namespace mozilla {
+
+void DelayForChaosMode(ChaosFeature aFeature,
+                       const uint32_t aMicrosecondLimit) {
+  if (!ChaosMode::isActive(aFeature)) {
+    return;
+  }
+
+  MOZ_ASSERT(aMicrosecondLimit <= 1000);
+#if defined(XP_WIN)
+  // Windows doesn't support sleeping at less than millisecond resolution.
+  // We could spin here, or we could just sleep for one millisecond.
+  // Sleeping for a full millisecond causes heavy delays, so we don't do
+  // anything here for now until we have found a good way to sleep more
+  // precisely here.
+#else
+  const uint32_t duration = ChaosMode::randomUint32LessThan(aMicrosecondLimit);
+  ::usleep(duration);
+#endif
+}
+
+}  // namespace mozilla