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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef nsLayoutStatics_h__
#define nsLayoutStatics_h__
#include "nscore.h"
#include "MainThreadUtils.h"
#include "nsISupportsImpl.h"
#include "nsDebug.h"
// This isn't really a class, it's a namespace for static methods.
// Documents and other objects can hold a reference to the layout static
// objects so that they last past the xpcom-shutdown notification.
class nsLayoutStatics {
public:
// Called by the layout module constructor. This call performs an AddRef()
// internally.
static nsresult Initialize();
static void AddRef() {
NS_ASSERTION(NS_IsMainThread(),
"nsLayoutStatics reference counting must be on main thread");
NS_ASSERTION(sLayoutStaticRefcnt,
"nsLayoutStatics already dropped to zero!");
++sLayoutStaticRefcnt;
NS_LOG_ADDREF(&sLayoutStaticRefcnt, sLayoutStaticRefcnt, "nsLayoutStatics",
1);
}
static void Release() {
NS_ASSERTION(NS_IsMainThread(),
"nsLayoutStatics reference counting must be on main thread");
--sLayoutStaticRefcnt;
NS_LOG_RELEASE(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
"nsLayoutStatics");
if (!sLayoutStaticRefcnt) Shutdown();
}
private:
// not to be called!
nsLayoutStatics();
static void Shutdown();
static nsrefcnt sLayoutStaticRefcnt;
};
#endif // nsLayoutStatics_h__
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