gecko/layout/base/ArenaObjectID.h

37 lines
1.1 KiB
C++

/* -*- 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