The Tor Browser: layout/base/nsArenaMemoryStats.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     7 #ifndef nsArenaMemoryStats_h

     8 #define nsArenaMemoryStats_h

    10 #include "mozilla/Assertions.h"

    11 #include "mozilla/PodOperations.h"

    13 class nsTabSizes {

    14 public:

    15   enum Kind {

    16       DOM,        // DOM stuff.

    17       Style,      // Style stuff.

    18       Other       // Everything else.

    19   };

    21   nsTabSizes() { mozilla::PodZero(this); }

    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   }

    33   size_t mDom;

    34   size_t mStyle;

    35   size_t mOther;

    36 };

    38 #define FRAME_ID_STAT_FIELD(classname) mArena##classname

    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)

    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   {}

    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   }

    69   #define DECL_SIZE(kind, mSize) size_t mSize;

    70   FOR_EACH_SIZE(DECL_SIZE)

    71   #undef DECL_SIZE

    72   #define FRAME_ID(classname) size_t FRAME_ID_STAT_FIELD(classname);

    73   #include "nsFrameIdList.h"

    74   #undef FRAME_ID

    75   int dummy;  // present just to absorb the trailing comma from FRAME_ID in the

    76               // constructor

    78 #undef FOR_EACH_SIZE

    79 };

    81 #endif // nsArenaMemoryStats_h

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