u_pointer.h

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/**************************************************************************
 * 
 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
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 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
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#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;
}

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 );
}


static INLINE void *
align16( void *unaligned )
{
   return align_pointer( unaligned, 16 );
}



#ifdef __cplusplus
}
#endif

#endif /* U_POINTER_H */

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