LCOV - app.info - js/src/jscell.h

LCOV - code coverage report
| Current view: | directory - js/src - jscell.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 1 | 1 | 100.0 %
| Date: | 2012-04-07 | Functions: | 1 | 1 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  *
           3                 :  * ***** BEGIN LICENSE BLOCK *****
           4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           5                 :  *
           6                 :  * The contents of this file are subject to the Mozilla Public License Version
           7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           8                 :  * the License. You may obtain a copy of the License at
           9                 :  * http://www.mozilla.org/MPL/
          10                 :  *
          11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          13                 :  * for the specific language governing rights and limitations under the
          14                 :  * License.
          15                 :  *
          16                 :  * The Original Code is SpiderMonkey code.
          17                 :  *
          18                 :  * The Initial Developer of the Original Code is
          19                 :  * Mozilla Corporation.
          20                 :  * Portions created by the Initial Developer are Copyright (C) 2010
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  * Gregor Wagner <anygregor@gmail.com>
          25                 :  *
          26                 :  * Alternatively, the contents of this file may be used under the terms of
          27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          30                 :  * of those above. If you wish to allow use of your version of this file only
          31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          32                 :  * use your version of this file under the terms of the MPL, indicate your
          33                 :  * decision by deleting the provisions above and replace them with the notice
          34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          35                 :  * the provisions above, a recipient may use your version of this file under
          36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          37                 :  *
          38                 :  * ***** END LICENSE BLOCK ***** */
          39                 :
          40                 : #ifndef jscell_h___
          41                 : #define jscell_h___
          42                 :
          43                 : #include "jspubtd.h"
          44                 :
          45                 : struct JSCompartment;
          46                 :
          47                 : namespace js {
          48                 : namespace gc {
          49                 :
          50                 : struct ArenaHeader;
          51                 : struct Chunk;
          52                 :
          53                 : /* The GC allocation kinds. */
          54                 : enum AllocKind {
          55                 :     FINALIZE_OBJECT0,
          56                 :     FINALIZE_OBJECT0_BACKGROUND,
          57                 :     FINALIZE_OBJECT2,
          58                 :     FINALIZE_OBJECT2_BACKGROUND,
          59                 :     FINALIZE_OBJECT4,
          60                 :     FINALIZE_OBJECT4_BACKGROUND,
          61                 :     FINALIZE_OBJECT8,
          62                 :     FINALIZE_OBJECT8_BACKGROUND,
          63                 :     FINALIZE_OBJECT12,
          64                 :     FINALIZE_OBJECT12_BACKGROUND,
          65                 :     FINALIZE_OBJECT16,
          66                 :     FINALIZE_OBJECT16_BACKGROUND,
          67                 :     FINALIZE_OBJECT_LAST = FINALIZE_OBJECT16_BACKGROUND,
          68                 :     FINALIZE_SCRIPT,
          69                 :     FINALIZE_SHAPE,
          70                 :     FINALIZE_BASE_SHAPE,
          71                 :     FINALIZE_TYPE_OBJECT,
          72                 : #if JS_HAS_XML_SUPPORT
          73                 :     FINALIZE_XML,
          74                 : #endif
          75                 :     FINALIZE_SHORT_STRING,
          76                 :     FINALIZE_STRING,
          77                 :     FINALIZE_EXTERNAL_STRING,
          78                 :     FINALIZE_LAST = FINALIZE_EXTERNAL_STRING
          79                 : };
          80                 :
          81                 : static const unsigned FINALIZE_LIMIT = FINALIZE_LAST + 1;
          82                 : static const unsigned FINALIZE_OBJECT_LIMIT = FINALIZE_OBJECT_LAST + 1;
          83                 :
          84                 : /*
          85                 :  * Live objects are marked black. How many other additional colors are available
          86                 :  * depends on the size of the GCThing. Objects marked gray are eligible for
          87                 :  * cycle collection.
          88                 :  */
          89                 : static const uint32_t BLACK = 0;
          90                 : static const uint32_t GRAY = 1;
          91                 :
          92                 : /*
          93                 :  * A GC cell is the base class for all GC things.
          94                 :  */
          95        26516409 : struct Cell {
          96                 :     static const size_t CellShift = 3;
          97                 :     static const size_t CellSize = size_t(1) << CellShift;
          98                 :     static const size_t CellMask = CellSize - 1;
          99                 :
         100                 :     inline uintptr_t address() const;
         101                 :     inline ArenaHeader *arenaHeader() const;
         102                 :     inline Chunk *chunk() const;
         103                 :     inline AllocKind getAllocKind() const;
         104                 :
         105                 :     JS_ALWAYS_INLINE bool isMarked(uint32_t color = BLACK) const;
         106                 :     JS_ALWAYS_INLINE bool markIfUnmarked(uint32_t color = BLACK) const;
         107                 :     JS_ALWAYS_INLINE void unmark(uint32_t color) const;
         108                 :
         109                 :     inline JSCompartment *compartment() const;
         110                 :
         111                 : #ifdef DEBUG
         112                 :     inline bool isAligned() const;
         113                 : #endif
         114                 : };
         115                 :
         116                 : } /* namespace gc */
         117                 : } /* namespace js */
         118                 :
         119                 : #endif /* jscell_h___ */

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