forked from KolibriOS/kolibrios
131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef U_POINTER_H
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#define U_POINTER_H
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#include "pipe/p_compiler.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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static INLINE intptr_t
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pointer_to_intptr( const void *p )
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{
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union {
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const void *p;
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intptr_t i;
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} pi;
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pi.p = p;
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return pi.i;
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}
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static INLINE void *
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intptr_to_pointer( intptr_t i )
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{
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union {
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void *p;
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intptr_t i;
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} pi;
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pi.i = i;
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return pi.p;
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}
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static INLINE uintptr_t
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pointer_to_uintptr( const void *ptr )
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{
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union {
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const void *p;
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uintptr_t u;
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} pu;
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pu.p = ptr;
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return pu.u;
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}
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static INLINE void *
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uintptr_to_pointer( uintptr_t u )
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{
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union {
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void *p;
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uintptr_t u;
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} pu;
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pu.u = u;
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return pu.p;
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}
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/**
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* Return a pointer aligned to next multiple of N bytes.
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*/
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static INLINE void *
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align_pointer( const void *unaligned, uintptr_t alignment )
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{
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uintptr_t aligned = (pointer_to_uintptr( unaligned ) + alignment - 1) & ~(alignment - 1);
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return uintptr_to_pointer( aligned );
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}
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/**
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* Return a pointer aligned to next multiple of 16 bytes.
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*/
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static INLINE void *
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align16( void *unaligned )
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{
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return align_pointer( unaligned, 16 );
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}
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typedef void (*func_pointer)(void);
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static INLINE func_pointer
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pointer_to_func( void *p )
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{
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union {
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void *p;
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func_pointer f;
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} pf;
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pf.p = p;
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return pf.f;
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}
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static INLINE void *
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func_to_pointer( func_pointer f )
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{
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union {
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void *p;
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func_pointer f;
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} pf;
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pf.f = f;
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return pf.p;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* U_POINTER_H */
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