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Introducing MEM_CP_{GET_[NON_NULL_]POINTER, SET_[NON_NULL_]POINTER} getters / setters for compressed pointers.

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JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
This commit is contained in:
Ruben Ayrapetyan
2015-05-13 20:54:41 +03:00
parent da86a52fe9
commit c4e7f56562
6 changed files with 62 additions and 58 deletions
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jerry-core/mem/mem-allocator.h
+42 -3
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@@ -36,7 +36,7 @@ typedef uint16_t mem_cpointer_t;
/**
* Representation of NULL value for compressed pointers
*/
#define MEM_COMPRESSED_POINTER_NULL 0
#define MEM_CP_NULL 0
/**
* Required alignment for allocated units/blocks
@@ -46,12 +46,12 @@ typedef uint16_t mem_cpointer_t;
/**
* Width of compressed memory pointer
*/
#define MEM_COMPRESSED_POINTER_WIDTH (MEM_HEAP_OFFSET_LOG - MEM_ALIGNMENT_LOG)
#define MEM_CP_WIDTH (MEM_HEAP_OFFSET_LOG - MEM_ALIGNMENT_LOG)
/**
* Compressed pointer value mask
*/
#define MEM_COMPRESSED_POINTER_MASK ((1ull << MEM_COMPRESSED_POINTER_WIDTH) - 1)
#define MEM_CP_MASK ((1ull << MEM_CP_WIDTH) - 1)
/**
* Heap offset value mask
@@ -80,6 +80,45 @@ typedef enum
*/
typedef void (*mem_try_give_memory_back_callback_t) (mem_try_give_memory_back_severity_t);
/**
* Get value of pointer from specified non-null compressed pointer value
*/
#define MEM_CP_GET_NON_NULL_POINTER(type, cp_value) \
((type *) mem_decompress_pointer (cp_value))
/**
* Get value of pointer from specified compressed pointer value
*/
#define MEM_CP_GET_POINTER(type, cp_value) \
(((unlikely ((cp_value) == MEM_CP_NULL)) ? NULL : MEM_CP_GET_NON_NULL_POINTER (type, cp_value)))
/**
* Set value of non-null compressed pointer so that it will correspond
* to specified non_compressed_pointer
*/
#define MEM_CP_SET_NON_NULL_POINTER(cp_value, non_compressed_pointer) \
(cp_value) = (mem_compress_pointer (non_compressed_pointer) & MEM_CP_MASK)
/**
* Set value of compressed pointer so that it will correspond
* to specified non_compressed_pointer
*/
#define MEM_CP_SET_POINTER(cp_value, non_compressed_pointer) \
do \
{ \
auto __temp_pointer = non_compressed_pointer; \
non_compressed_pointer = __temp_pointer; \
} while (0); \
\
if (unlikely ((non_compressed_pointer) == NULL)) \
{ \
(cp_value) = MEM_CP_NULL; \
} \
else \
{ \
MEM_CP_SET_NON_NULL_POINTER (cp_value, non_compressed_pointer); \
}
extern void mem_init (void);
extern void mem_finalize (bool is_show_mem_stats);