mono/sgen/sgen-tagged-pointer.h

   1 /**
   2  * \file
   3  * Macros for tagging and untagging pointers.
   4  *
   5  * Copyright (C) 2014 Xamarin Inc
   6  *
   7  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   8  */
   9
  10 #ifndef __MONO_SGEN_TAGGED_POINTER_H__
  11 #define __MONO_SGEN_TAGGED_POINTER_H__
  12
  13 #define SGEN_TAGGED_POINTER_MASK        7
  14
  15 #define SGEN_POINTER_IS_TAGGED_1(p)     ((mword)(p) & 1)
  16 #define SGEN_POINTER_TAG_1(p)           ((void*)((mword)(p) | 1))
  17 #define SGEN_POINTER_UNTAG_1(p)         ((void*)((mword)(p) & ~1))
  18
  19 #define SGEN_POINTER_IS_TAGGED_2(p)     ((mword)(p) & 2)
  20 #define SGEN_POINTER_TAG_2(p)           ((void*)((mword)(p) | 2))
  21 #define SGEN_POINTER_UNTAG_2(p)         ((void*)((mword)(p) & ~2))
  22
  23 #define SGEN_POINTER_TAG_12(p)          ((mword)(p) & 3)
  24 #define SGEN_POINTER_SET_TAG_12(p,t)    ((void*)(((mword)(p) & ~3) | (t)))
  25
  26 #define SGEN_POINTER_IS_TAGGED_4(p)     ((mword)(p) & 4)
  27 #define SGEN_POINTER_TAG_4(p)           ((void*)((mword)(p) | 4))
  28 #define SGEN_POINTER_UNTAG_4(p)         ((void*)((mword)(p) & ~4))
  29
  30 #define SGEN_POINTER_UNTAG_12(p)        ((void*)((mword)(p) & ~3))
  31 #define SGEN_POINTER_UNTAG_24(p)        ((void*)((mword)(p) & ~6))
  32
  33 #define SGEN_POINTER_IS_TAGGED_ANY(p)   ((mword)(p) & SGEN_TAGGED_POINTER_MASK)
  34 #define SGEN_POINTER_UNTAG_ALL(p)       ((void*)((mword)(p) & ~SGEN_TAGGED_POINTER_MASK))
  35
  36 #endif