1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/build/nsLayoutStatics.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef nsLayoutStatics_h__
1.9 +#define nsLayoutStatics_h__
1.10 +
1.11 +#include "nscore.h"
1.12 +#include "MainThreadUtils.h"
1.13 +#include "nsISupportsImpl.h"
1.14 +#include "nsDebug.h"
1.15 +
1.16 +// This isn't really a class, it's a namespace for static methods.
1.17 +// Documents and other objects can hold a reference to the layout static
1.18 +// objects so that they last past the xpcom-shutdown notification.
1.19 +
1.20 +class nsLayoutStatics
1.21 +{
1.22 +public:
1.23 + // Called by the layout module constructor. This call performs an AddRef()
1.24 + // internally.
1.25 + static nsresult Initialize();
1.26 +
1.27 + static void AddRef()
1.28 + {
1.29 + NS_ASSERTION(NS_IsMainThread(),
1.30 + "nsLayoutStatics reference counting must be on main thread");
1.31 +
1.32 + NS_ASSERTION(sLayoutStaticRefcnt,
1.33 + "nsLayoutStatics already dropped to zero!");
1.34 +
1.35 + ++sLayoutStaticRefcnt;
1.36 + NS_LOG_ADDREF(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
1.37 + "nsLayoutStatics", 1);
1.38 + }
1.39 + static void Release()
1.40 + {
1.41 + NS_ASSERTION(NS_IsMainThread(),
1.42 + "nsLayoutStatics reference counting must be on main thread");
1.43 +
1.44 + --sLayoutStaticRefcnt;
1.45 + NS_LOG_RELEASE(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
1.46 + "nsLayoutStatics");
1.47 +
1.48 + if (!sLayoutStaticRefcnt)
1.49 + Shutdown();
1.50 + }
1.51 +
1.52 +private:
1.53 + // not to be called!
1.54 + nsLayoutStatics();
1.55 +
1.56 + static void Shutdown();
1.57 +
1.58 + static nsrefcnt sLayoutStaticRefcnt;
1.59 +};
1.60 +
1.61 +class nsLayoutStaticsRef
1.62 +{
1.63 +public:
1.64 + nsLayoutStaticsRef()
1.65 + {
1.66 + nsLayoutStatics::AddRef();
1.67 + }
1.68 + ~nsLayoutStaticsRef()
1.69 + {
1.70 + nsLayoutStatics::Release();
1.71 + }
1.72 +};
1.73 +
1.74 +#endif // nsLayoutStatics_h__
