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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
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