mono/metadata/sgen-tagged-pointer.h

   1 /*
   2  * sgen-tagged-pointer.h: Macros for tagging and untagging pointers.
   3  *
   4  * Copyright (C) 2014 Xamarin Inc
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License 2.0 as published by the Free Software Foundation;
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License 2.0 along with this library; if not, write to the Free
  17  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #ifndef __MONO_SGEN_TAGGED_POINTER_H__
  21 #define __MONO_SGEN_TAGGED_POINTER_H__
  22
  23 #define SGEN_TAGGED_POINTER_MASK        7
  24
  25 #define SGEN_POINTER_IS_TAGGED_1(p)     ((mword)(p) & 1)
  26 #define SGEN_POINTER_TAG_1(p)           ((void*)((mword)(p) | 1))
  27 #define SGEN_POINTER_UNTAG_1(p)         ((void*)((mword)(p) & ~1))
  28
  29 #define SGEN_POINTER_IS_TAGGED_2(p)     ((mword)(p) & 2)
  30 #define SGEN_POINTER_TAG_2(p)           ((void*)((mword)(p) | 2))
  31 #define SGEN_POINTER_UNTAG_2(p)         ((void*)((mword)(p) & ~2))
  32
  33 #define SGEN_POINTER_TAG_12(p)          ((mword)(p) & 3)
  34 #define SGEN_POINTER_SET_TAG_12(p,t)    ((void*)(((mword)(p) & ~3) | (t)))
  35
  36 #define SGEN_POINTER_IS_TAGGED_4(p)     ((mword)(p) & 4)
  37 #define SGEN_POINTER_TAG_4(p)           ((void*)((mword)(p) | 4))
  38 #define SGEN_POINTER_UNTAG_4(p)         ((void*)((mword)(p) & ~4))
  39
  40 #define SGEN_POINTER_UNTAG_24(p)        ((void*)((mword)(p) & ~6))
  41
  42 #define SGEN_POINTER_IS_TAGGED_ANY(p)   ((mword)(p) & SGEN_TAGGED_POINTER_MASK)
  43 #define SGEN_POINTER_UNTAG_ALL(p)       ((void*)((mword)(p) & ~SGEN_TAGGED_POINTER_MASK))
  44
  45 #endif