72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
/* 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;
|
|
};
|
|
|
|
class nsLayoutStaticsRef
|
|
{
|
|
public:
|
|
nsLayoutStaticsRef()
|
|
{
|
|
nsLayoutStatics::AddRef();
|
|
}
|
|
~nsLayoutStaticsRef()
|
|
{
|
|
nsLayoutStatics::Release();
|
|
}
|
|
};
|
|
|
|
#endif // nsLayoutStatics_h__
|