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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
1186 changed files with 381859 additions and 0 deletions
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lib/tptr.h Normal file
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
tptr.h
Abstract:
Support for tagged pointers and other low level pointer manipulation macros.
Author:
Leonardo de Moura (leonardo) 2006-09-13.
Revision History:
--*/
#ifndef _TPTR_H_
#define _TPTR_H_
#include"machine.h"
#define TAG_SHIFT PTR_ALIGNMENT
#define ALIGNMENT_VALUE (1 << PTR_ALIGNMENT)
#define TAG_MASK (ALIGNMENT_VALUE - 1)
#define PTR_MASK (~TAG_MASK)
#define ALIGN(T, PTR) reinterpret_cast<T>(((reinterpret_cast<size_t>(PTR) >> PTR_ALIGNMENT) + \
static_cast<size_t>((reinterpret_cast<size_t>(PTR) & TAG_MASK) != 0)) << PTR_ALIGNMENT)
#define UNTAG(T, PTR) reinterpret_cast<T>(reinterpret_cast<size_t>(PTR) & PTR_MASK)
#define TAG(T, PTR, TAG_VAL) reinterpret_cast<T>(reinterpret_cast<size_t>(PTR) | static_cast<size_t>(TAG_VAL))
#define GET_TAG(PTR) (reinterpret_cast<size_t>(PTR) & TAG_MASK)
#define BOXINT(T, VAL) reinterpret_cast<T>(static_cast<size_t>(VAL) << PTR_ALIGNMENT)
#define BOXTAGINT(T, VAL, TAG_VAL) reinterpret_cast<T>((static_cast<size_t>(VAL) << PTR_ALIGNMENT) | static_cast<size_t>(TAG_VAL))
#define UNBOXINT(PTR) static_cast<int>(reinterpret_cast<size_t>(PTR) >> PTR_ALIGNMENT)
#endif /* _TPTR_H_ */