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Add ArrayBuffer with user specified buffer

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New API functions:
 - jerry_create_arraybuffer_external
 - jerry_get_arraybuffer_pointer

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com
This commit is contained in:
Peter Gal
2018-01-08 15:35:18 +01:00
committed by yichoi
parent 7acd688513
commit 4b699e997a
8 changed files with 416 additions and 5 deletions
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jerry-core/ecma/base/ecma-gc.c
+20 -2
View File
@@ -570,11 +570,29 @@ ecma_gc_free_object (ecma_object_t *object_p) /**< object to free */
case LIT_MAGIC_STRING_ARRAY_BUFFER_UL:
{
ecma_length_t arraybuffer_length = ext_object_p->u.class_prop.u.length;
size_t size = sizeof (ecma_extended_object_t) + arraybuffer_length;
size_t size;
if (ECMA_ARRAYBUFFER_HAS_EXTERNAL_MEMORY (ext_object_p))
{
size = sizeof (ecma_arraybuffer_external_info);
/* Call external free callback if any. */
ecma_arraybuffer_external_info *array_p = (ecma_arraybuffer_external_info *) ext_object_p;
JERRY_ASSERT (array_p != NULL);
if (array_p->free_cb != NULL)
{
(array_p->free_cb) (array_p->buffer_p);
}
}
else
{
size = sizeof (ecma_extended_object_t) + arraybuffer_length;
}
ecma_dealloc_extended_object (object_p, size);
return;
}
#endif /* !CONFIG_DISABLE_ES2015_TYPEDARRAY_BUILTIN */
#ifndef CONFIG_DISABLE_ES2015_PROMISE_BUILTIN
case LIT_MAGIC_STRING_PROMISE_UL:
jerry-core/ecma/base/ecma-globals.h
+29
View File
@@ -712,6 +712,8 @@ typedef struct
struct
{
uint16_t class_id; /**< class id of the object */
uint16_t extra_info; /**< extra information for the object
e.g. array buffer type info (external/internal) */
/*
* Description of extra fields. These extra fields depends on the class_id.
@@ -1243,6 +1245,33 @@ typedef struct
#ifndef CONFIG_DISABLE_ES2015_TYPEDARRAY_BUILTIN
/**
* Extra information for ArrayBuffers.
*/
typedef enum
{
ECMA_ARRAYBUFFER_INTERNAL_MEMORY = 0u, /* ArrayBuffer memory is handled internally. */
ECMA_ARRAYBUFFER_EXTERNAL_MEMORY = (1u << 0), /* ArrayBuffer created via jerry_create_arraybuffer_external. */
} ecma_arraybuffer_extra_flag_t;
#define ECMA_ARRAYBUFFER_HAS_EXTERNAL_MEMORY(object_p) \
((((ecma_extended_object_t *) object_p)->u.class_prop.extra_info & ECMA_ARRAYBUFFER_EXTERNAL_MEMORY) != 0)
/**
* Struct to store information for ArrayBuffers with external memory.
*
* The following elements are stored in Jerry memory.
*
* buffer_p - pointer to the external memory.
* free_cb - pointer to a callback function which is called when the ArrayBuffer is freed.
*/
typedef struct
{
ecma_extended_object_t extended_object; /**< extended object part */
void *buffer_p; /**< external buffer pointer */
ecma_object_native_free_callback_t free_cb; /**< the free callback for the above buffer pointer */
} ecma_arraybuffer_external_info;
/**
* Some internal properties of TypedArray object.
* It is only used when the offset is not 0, and