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