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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /image/ShutdownTracker.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'image/ShutdownTracker.cpp')
-rw-r--r--image/ShutdownTracker.cpp75
1 files changed, 75 insertions, 0 deletions
diff --git a/image/ShutdownTracker.cpp b/image/ShutdownTracker.cpp
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index 000000000..c52c0b79e
--- /dev/null
+++ b/image/ShutdownTracker.cpp
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+/* -*- 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