From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 image/ShutdownTracker.cpp | 75 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 image/ShutdownTracker.cpp

(limited to 'image/ShutdownTracker.cpp')

diff --git a/image/ShutdownTracker.cpp b/image/ShutdownTracker.cpp
new file mode 100644
index 000000000..c52c0b79e
--- /dev/null
+++ b/image/ShutdownTracker.cpp
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 2; 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 "ShutdownTracker.h"
+
+#include "mozilla/Services.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+
+namespace mozilla {
+namespace image {
+
+class ShutdownTrackerImpl;
+
+///////////////////////////////////////////////////////////////////////////////
+// Static Data
+///////////////////////////////////////////////////////////////////////////////
+
+// Whether we've observed shutdown starting yet.
+static bool sShutdownHasStarted = false;
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Implementation
+///////////////////////////////////////////////////////////////////////////////
+
+struct ShutdownObserver : public nsIObserver
+{
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD Observe(nsISupports*, const char* aTopic, const char16_t*) override
+  {
+    if (strcmp(aTopic, "xpcom-will-shutdown") != 0) {
+      return NS_OK;
+    }
+
+    nsCOMPtr<nsIObserverService> os = services::GetObserverService();
+    if (os) {
+      os->RemoveObserver(this, "xpcom-will-shutdown");
+    }
+
+    sShutdownHasStarted = true;
+    return NS_OK;
+  }
+
+private:
+  virtual ~ShutdownObserver() { }
+};
+
+NS_IMPL_ISUPPORTS(ShutdownObserver, nsIObserver)
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Public API
+///////////////////////////////////////////////////////////////////////////////
+
+/* static */ void
+ShutdownTracker::Initialize()
+{
+  nsCOMPtr<nsIObserverService> os = services::GetObserverService();
+  if (os) {
+    os->AddObserver(new ShutdownObserver, "xpcom-will-shutdown", false);
+  }
+}
+
+/* static */ bool
+ShutdownTracker::ShutdownHasStarted()
+{
+  return sShutdownHasStarted;
+}
+
+} // namespace image
+} // namespace mozilla
-- 
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