summaryrefslogtreecommitdiff
path: root/layout/base/ArenaObjectID.h
blob: db8dfe872b89bc9ffb7a2954572595ed2c61043c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* enum type for objects that can be allocated by an nsPresArena */

#ifndef mozilla_ArenaObjectID_h
#define mozilla_ArenaObjectID_h

#include "nsQueryFrame.h"

namespace mozilla {

enum ArenaObjectID {
  eArenaObjectID_DummyBeforeFirstObjectID = nsQueryFrame::NON_FRAME_MARKER - 1,

#define PRES_ARENA_OBJECT(name_) \
  eArenaObjectID_##name_,
#include "nsPresArenaObjectList.h"
#undef PRES_ARENA_OBJECT

  /**
   * The PresArena implementation uses this bit to distinguish objects
   * allocated by size from objects allocated by type ID (that is, frames
   * using AllocateByFrameID and other objects using AllocateByObjectID).
   * It should not collide with any Object ID (above) or frame ID (in
   * nsQueryFrame.h).  It is not 0x80000000 to avoid the question of
   * whether enumeration constants are signed.
   */
  eArenaObjectID_NON_OBJECT_MARKER = 0x40000000
};

};

#endif