Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
||
| 3 | * Copyright 2007-2008 VMware, Inc. |
||
| 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 VMWARE 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 |
||
| 34 | extern "C" { |
||
| 35 | #endif |
||
| 36 | |||
| 37 | static INLINE intptr_t |
||
| 38 | pointer_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 | |||
| 48 | static INLINE void * |
||
| 49 | intptr_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 | |||
| 59 | static INLINE uintptr_t |
||
| 60 | pointer_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 | |||
| 70 | static INLINE void * |
||
| 71 | uintptr_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 | */ |
||
| 84 | static INLINE void * |
||
| 85 | align_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 | */ |
||
| 95 | static INLINE void * |
||
| 96 | align16( void *unaligned ) |
||
| 97 | { |
||
| 98 | return align_pointer( unaligned, 16 ); |
||
| 99 | } |
||
| 100 | |||
| 101 | typedef void (*func_pointer)(void); |
||
| 102 | |||
| 103 | static INLINE func_pointer |
||
| 104 | pointer_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 | |||
| 114 | static INLINE void * |
||
| 115 | func_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 */ |