1 files changed, 41 insertions, 0 deletions
diff --git a/dom/canvas/WebGLContextLossHandler.cpp b/dom/canvas/WebGLContextLossHandler.cpp
new file mode 100644
index 0000000000..b21f59c1b7
--- /dev/null
+++ b/dom/canvas/WebGLContextLossHandler.cpp
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "WebGLContextLossHandler.h"
+#include "WebGLContext.h"
+
+#include "base/message_loop.h"
+
+namespace mozilla {
+
+WebGLContextLossHandler::WebGLContextLossHandler(WebGLContext* const webgl)
+    : mTimerIsScheduled(false) {
+  const auto weak = WeakPtr<WebGLContext>(webgl);
+  mRunnable = NS_NewRunnableFunction("WebGLContextLossHandler", [weak]() {
+    const auto strong = RefPtr<WebGLContext>(weak);
+    if (!strong) {
+      return;
+    }
+    strong->CheckForContextLoss();
+  });
+}
+
+WebGLContextLossHandler::~WebGLContextLossHandler() = default;
+
+////////////////////
+
+void WebGLContextLossHandler::RunTimer() {
+  const uint32_t kDelayMS = 1000;
+  MOZ_ASSERT(GetCurrentSerialEventTarget());
+  // Only create a new task if one isn't already queued.
+  if (mTimerIsScheduled.compareExchange(false, true)) {
+    GetCurrentSerialEventTarget()->DelayedDispatch(do_AddRef(mRunnable),
+                                                   kDelayMS);
+  }
+}
+
+void WebGLContextLossHandler::ClearTimer() { mTimerIsScheduled = false; }
+
+}  // namespace mozilla