LCOV - code coverage report
Current view: directory - objdir/dist/include - nsLayoutStatics.h (source / functions) Found Hit Coverage
Test: app.info Lines: 13 6 46.2 %
Date: 2012-06-02 Functions: 2 1 50.0 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is the Mozilla platform.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * Benjamin Smedberg <benjamin@smedbergs.us>.
      18                 :  *
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2006
      20                 :  * the Mozilla Foundation <http://www.mozilla.org/>. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #ifndef nsLayoutStatics_h__
      39                 : #define nsLayoutStatics_h__
      40                 : 
      41                 : #include "nscore.h"
      42                 : #include "nsThreadUtils.h"
      43                 : 
      44                 : // This isn't really a class, it's a namespace for static methods.
      45                 : // Documents and other objects can hold a reference to the layout static
      46                 : // objects so that they last past the xpcom-shutdown notification.
      47                 : 
      48                 : class nsLayoutStatics
      49                 : {
      50                 : public:
      51                 :   // Called by the layout module constructor. This call performs an AddRef()
      52                 :   // internally.
      53                 :   static nsresult Initialize();
      54                 : 
      55            3877 :   static void AddRef()
      56                 :   {
      57            3877 :     NS_ASSERTION(NS_IsMainThread(),
      58                 :                  "nsLayoutStatics reference counting must be on main thread");
      59                 : 
      60            3877 :     NS_ASSERTION(sLayoutStaticRefcnt,
      61                 :                  "nsLayoutStatics already dropped to zero!");
      62                 : 
      63            3877 :     ++sLayoutStaticRefcnt;
      64                 :     NS_LOG_ADDREF(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
      65            3877 :                   "nsLayoutStatics", 1);
      66            3877 :   }
      67               0 :   static void Release()
      68                 :   {
      69               0 :     NS_ASSERTION(NS_IsMainThread(),
      70                 :                  "nsLayoutStatics reference counting must be on main thread");
      71                 : 
      72               0 :     --sLayoutStaticRefcnt;
      73                 :     NS_LOG_RELEASE(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
      74               0 :                    "nsLayoutStatics");
      75                 : 
      76               0 :     if (!sLayoutStaticRefcnt)
      77               0 :       Shutdown();
      78               0 :   }
      79                 : 
      80                 : private:
      81                 :   // not to be called!
      82                 :   nsLayoutStatics();
      83                 : 
      84                 :   static void Shutdown();
      85                 : 
      86                 :   static nsrefcnt sLayoutStaticRefcnt;
      87                 : };
      88                 : 
      89                 : class nsLayoutStaticsRef
      90                 : {
      91                 : public:
      92                 :   nsLayoutStaticsRef()
      93                 :   {
      94                 :     nsLayoutStatics::AddRef();
      95                 :   }
      96                 :   ~nsLayoutStaticsRef()
      97                 :   {
      98                 :     nsLayoutStatics::Release();
      99                 :   }
     100                 : };
     101                 : 
     102                 : #endif // nsLayoutStatics_h__

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