Roland Takacs
21f561f8ef
JerryScript-DCO-1.0-Signed-off-by: Roland Takacs rtakacs.u-szeged@partner.samsung.com
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* Copyright 2015 Samsung Electronics Co., Ltd.
|
|
* Copyright 2015 University of Szeged
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef RCS_CPOINTER_H
|
|
#define RCS_CPOINTER_H
|
|
|
|
#include "rcs-globals.h"
|
|
|
|
#define RCS_CPOINTER_WIDTH (MEM_CP_WIDTH + MEM_ALIGNMENT_LOG - RCS_DYN_STORAGE_LENGTH_UNIT_LOG)
|
|
|
|
/**
|
|
* Dynamic storage-specific extended compressed pointer
|
|
*
|
|
* Note:
|
|
* the pointer can represent addresses aligned by RCS_DYN_STORAGE_LENGTH_UNIT,
|
|
* while mem_cpointer_t can only represent addresses aligned by MEM_ALIGNMENT.
|
|
*/
|
|
typedef struct
|
|
{
|
|
union
|
|
{
|
|
struct
|
|
{
|
|
mem_cpointer_t base_cp : MEM_CP_WIDTH; /**< pointer to base of addressed area */
|
|
#if MEM_ALIGNMENT_LOG > RCS_DYN_STORAGE_LENGTH_UNIT_LOG
|
|
uint16_t ext : (MEM_ALIGNMENT_LOG - RCS_DYN_STORAGE_LENGTH_UNIT_LOG); /**< extension of the basic
|
|
* compressed pointer
|
|
* used for more detailed
|
|
* addressing */
|
|
#endif /* MEM_ALIGNMENT_LOG > RCS_DYN_STORAGE_LENGTH_UNIT_LOG */
|
|
} value;
|
|
uint16_t packed_value;
|
|
};
|
|
} rcs_cpointer_t;
|
|
|
|
extern rcs_cpointer_t rcs_cpointer_compress (rcs_record_t *);
|
|
extern rcs_record_t *rcs_cpointer_decompress (rcs_cpointer_t);
|
|
extern rcs_cpointer_t rcs_cpointer_null_cp ();
|
|
|
|
#endif /* !RCS_CPOINTER_H */
|