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Introducing ecma_string_t type that will be used for ecma-strings instead of ecma_array_first_chunk_t.

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This commit is contained in:
Ruben Ayrapetyan 2014-08-13 16:59:45 +04:00
parent 567d54f7e5
commit b66981d19f
2 changed files with 48 additions and 0 deletions
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1
src/libecmaobjects/ecma-alloc.c
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@ -47,6 +47,7 @@ JERRY_STATIC_ASSERT(sizeof (ecma_object_t) <= 2 * sizeof (uint64_t));
JERRY_STATIC_ASSERT(sizeof (ecma_array_header_t) <= sizeof (uint32_t));
JERRY_STATIC_ASSERT(sizeof (ecma_array_first_chunk_t) == sizeof (uint64_t));
JERRY_STATIC_ASSERT(sizeof (ecma_array_non_first_chunk_t) == sizeof (uint64_t));
JERRY_STATIC_ASSERT(sizeof (ecma_string_t) == sizeof (uint64_t));
JERRY_STATIC_ASSERT(sizeof (ecma_completion_value_t) == sizeof (uint32_t));
/**

47
src/libecmaobjects/ecma-globals.h
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@ -521,6 +521,53 @@ typedef struct
uint8_t data[ sizeof (uint64_t) - sizeof (uint16_t) ];
} ecma_array_non_first_chunk_t;
/**
* Identifier for ecma-string's actual data container
*/
typedef enum
{
ECMA_STRING_CONTAINER_HEAP, /**< actual data is on the heap
in ecma_array_non_first_chunk_t */
ECMA_STRING_CONTAINER_LIT_TABLE, /**< actual data is in literal table */
ECMA_STRING_CONTAINER_IN_DESCRIPTOR /**< actual data is locally in the string's descriptor */
} ecma_string_container_t;
FIXME (Move to library that should define the type (libserializer /* ? */))
/**
* Index in literal table
*/
typedef uint32_t literal_index_t;
/**
* ECMA string-value descriptor
*/
typedef struct
{
/** Reference counter for the string */
unsigned int refs : CONFIG_ECMA_REFERENCE_COUNTER_WIDTH;
/** Where the string's data is placed (ecma_string_container_t) */
unsigned int container : 2;
/** String's length */
ecma_length_t length;
/**
* Actual data or identifier of it's place in container (depending on 'container' field)
*/
union
{
/** Index of string in literal table */
literal_index_t lit_index;
/** Compressed pointer to array_non_first_chunk_t */
unsigned int chunk_cp : ECMA_POINTER_FIELD_WIDTH;
/** Actual data if placed locally in the descriptor */
ecma_char_t chars[ sizeof (uint64_t) - sizeof (uint32_t) ];
} u;
} ecma_string_t;
/**
* \addtogroup reference ECMA-reference
* @{