forked from mirrors/gecko-dev
2257f3e1ae
We're seeing crashes in bug 1545381 in appshell shutdown, which appear to point to appshell initialization somehow falling over non-obviously. Appshell initialization should basically never fail, so let's complain loudly if that ever happens. Differential Revision: https://phabricator.services.mozilla.com/D38915 --HG-- extra : moz-landing-system : lando
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsAppShellSingleton_h__
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#define nsAppShellSingleton_h__
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/**
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* This file is designed to be included into the file that provides the
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* nsIModule implementation for a particular widget toolkit.
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*
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* The following functions are defined:
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* nsAppShellInit
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* nsAppShellShutdown
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* nsAppShellConstructor
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*
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* The nsAppShellInit function is designed to be used as a module constructor.
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* If you already have a module constructor, then call nsAppShellInit from your
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* module constructor.
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*
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* The nsAppShellShutdown function is designed to be used as a module
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* destructor. If you already have a module destructor, then call
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* nsAppShellShutdown from your module destructor.
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*
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* The nsAppShellConstructor function is designed to be used as a factory
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* method for the nsAppShell class.
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*/
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#include "nsXULAppAPI.h"
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static nsIAppShell* sAppShell;
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static nsresult nsAppShellInit() {
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NS_ASSERTION(!sAppShell, "already initialized");
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sAppShell = new nsAppShell();
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if (!sAppShell) return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(sAppShell);
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nsresult rv = static_cast<nsAppShell*>(sAppShell)->Init();
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// If we somehow failed to initialize the appshell, it's extremely likely
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// that we are sufficiently hosed that continuing on is just going to lead
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// to bad things later. By crashing early here, the crash report will
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// potentially contain a little more insight into what's going wrong than
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// if we waited for a crash further down the line. See also bug 1545381.
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MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
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return NS_OK;
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}
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static void nsAppShellShutdown() { NS_RELEASE(sAppShell); }
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nsresult nsAppShellConstructor(nsISupports* outer, const nsIID& iid,
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void** result) {
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NS_ENSURE_TRUE(!outer, NS_ERROR_NO_AGGREGATION);
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NS_ENSURE_TRUE(sAppShell, NS_ERROR_NOT_INITIALIZED);
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return sAppShell->QueryInterface(iid, result);
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}
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#endif // nsAppShellSingleton_h__
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