layout/base/nsArenaMemoryStats.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef nsArenaMemoryStats_h
   8 #define nsArenaMemoryStats_h
   9
  10 #include "mozilla/Assertions.h"
  11 #include "mozilla/PodOperations.h"
  12
  13 class nsTabSizes {
  14 public:
  15   enum Kind {
  16       DOM,        // DOM stuff.
  17       Style,      // Style stuff.
  18       Other       // Everything else.
  19   };
  20
  21   nsTabSizes() { mozilla::PodZero(this); }
  22
  23   void add(Kind kind, size_t n)
  24   {
  25     switch (kind) {
  26       case DOM:   mDom   += n; break;
  27       case Style: mStyle += n; break;
  28       case Other: mOther += n; break;
  29       default:    MOZ_CRASH("bad nsTabSizes kind");
  30     }
  31   }
  32
  33   size_t mDom;
  34   size_t mStyle;
  35   size_t mOther;
  36 };
  37
  38 #define FRAME_ID_STAT_FIELD(classname) mArena##classname
  39
  40 struct nsArenaMemoryStats {
  41 #define FOR_EACH_SIZE(macro) \
  42   macro(Other, mLineBoxes) \
  43   macro(Style, mRuleNodes) \
  44   macro(Style, mStyleContexts) \
  45   macro(Other, mOther)
  46
  47   nsArenaMemoryStats()
  48     :
  49       #define ZERO_SIZE(kind, mSize) mSize(0),
  50       FOR_EACH_SIZE(ZERO_SIZE)
  51       #undef ZERO_SIZE
  52       #define FRAME_ID(classname) FRAME_ID_STAT_FIELD(classname)(),
  53       #include "nsFrameIdList.h"
  54       #undef FRAME_ID
  55       dummy()
  56   {}
  57
  58   void addToTabSizes(nsTabSizes *sizes) const
  59   {
  60     #define ADD_TO_TAB_SIZES(kind, mSize) sizes->add(nsTabSizes::kind, mSize);
  61     FOR_EACH_SIZE(ADD_TO_TAB_SIZES)
  62     #undef ADD_TO_TAB_SIZES
  63     #define FRAME_ID(classname) \
  64       sizes->add(nsTabSizes::Other, FRAME_ID_STAT_FIELD(classname));
  65     #include "nsFrameIdList.h"
  66     #undef FRAME_ID
  67   }
  68
  69   size_t getTotalSize() const
  70   {
  71     size_t total = 0;
  72     #define ADD_TO_TOTAL_SIZE(kind, mSize) total += mSize;
  73     FOR_EACH_SIZE(ADD_TO_TOTAL_SIZE)
  74     #undef ADD_TO_TOTAL_SIZE
  75     #define FRAME_ID(classname) \
  76     total += FRAME_ID_STAT_FIELD(classname);
  77     #include "nsFrameIdList.h"
  78     #undef FRAME_ID
  79     return total;
  80   }
  81
  82   #define DECL_SIZE(kind, mSize) size_t mSize;
  83   FOR_EACH_SIZE(DECL_SIZE)
  84   #undef DECL_SIZE
  85   #define FRAME_ID(classname) size_t FRAME_ID_STAT_FIELD(classname);
  86   #include "nsFrameIdList.h"
  87   #undef FRAME_ID
  88   int dummy;  // present just to absorb the trailing comma from FRAME_ID in the
  89               // constructor
  90
  91 #undef FOR_EACH_SIZE
  92 };
  93
  94 #endif // nsArenaMemoryStats_h