1/**************************************************************************
2 *
3 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#ifndef U_POINTER_H
29#define U_POINTER_H
30
31#include "pipe/p_compiler.h"
32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
37static INLINE intptr_t
38pointer_to_intptr( const void *p )
39{
40   union {
41      const void *p;
42      intptr_t i;
43   } pi;
44   pi.p = p;
45   return pi.i;
46}
47
48static INLINE void *
49intptr_to_pointer( intptr_t i )
50{
51   union {
52      void *p;
53      intptr_t i;
54   } pi;
55   pi.i = i;
56   return pi.p;
57}
58
59static INLINE uintptr_t
60pointer_to_uintptr( const void *ptr )
61{
62   union {
63      const void *p;
64      uintptr_t u;
65   } pu;
66   pu.p = ptr;
67   return pu.u;
68}
69
70static INLINE void *
71uintptr_to_pointer( uintptr_t u )
72{
73   union {
74      void *p;
75      uintptr_t u;
76   } pu;
77   pu.u = u;
78   return pu.p;
79}
80
81/**
82 * Return a pointer aligned to next multiple of N bytes.
83 */
84static INLINE void *
85align_pointer( const void *unaligned, uintptr_t alignment )
86{
87   uintptr_t aligned = (pointer_to_uintptr( unaligned ) + alignment - 1) & ~(alignment - 1);
88   return uintptr_to_pointer( aligned );
89}
90
91
92/**
93 * Return a pointer aligned to next multiple of 16 bytes.
94 */
95static INLINE void *
96align16( void *unaligned )
97{
98   return align_pointer( unaligned, 16 );
99}
100
101typedef void (*func_pointer)(void);
102
103static INLINE func_pointer
104pointer_to_func( void *p )
105{
106   union {
107      void *p;
108      func_pointer f;
109   } pf;
110   pf.p = p;
111   return pf.f;
112}
113
114static INLINE void *
115func_to_pointer( func_pointer f )
116{
117   union {
118      void *p;
119      func_pointer f;
120   } pf;
121   pf.f = f;
122   return pf.p;
123}
124
125
126#ifdef __cplusplus
127}
128#endif
129
130#endif /* U_POINTER_H */
131