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