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Add ArrayBuffer detach operations (#3208)

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JerryScript-DCO-1.0-Signed-off-by: legendecas legendecas@gmail.com
This commit is contained in:
legendecas
2019-10-16 22:41:27 +08:00
committed by Dániel Bátyai
parent 09c5d98e25
commit 2e86bdae6f
11 changed files with 375 additions and 2 deletions
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jerry-core/api/jerry.c
+53
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@@ -3271,6 +3271,59 @@ jerry_get_arraybuffer_pointer (const jerry_value_t array_buffer) /**< Array Buff
return NULL;
} /* jerry_get_arraybuffer_pointer */
/**
* Get if the ArrayBuffer is detachable.
*
* @return boolean value - if success
* value marked with error flag - otherwise
*/
jerry_value_t
jerry_is_arraybuffer_detachable (const jerry_value_t value) /**< ArrayBuffer */
{
jerry_assert_api_available ();
#if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
if (ecma_is_arraybuffer (value))
{
ecma_object_t *buffer_p = ecma_get_object_from_value (value);
return ecma_arraybuffer_is_detachable (buffer_p) ? ECMA_VALUE_TRUE : ECMA_VALUE_FALSE;
}
#else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
JERRY_UNUSED (value);
#endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Expects an ArrayBuffer")));
} /* jerry_is_arraybuffer_detachable */
/**
* Detach the underlying data block from ArrayBuffer and set its bytelength to 0.
* This operation requires the ArrayBuffer to be external that created by
* `jerry_create_arraybuffer_external`.
*
* @return null value - if success
* value marked with error flag - otherwise
*/
jerry_value_t
jerry_detach_arraybuffer (const jerry_value_t value) /**< ArrayBuffer */
{
jerry_assert_api_available ();
#if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
if (ecma_is_arraybuffer (value))
{
ecma_object_t *buffer_p = ecma_get_object_from_value (value);
bool detached = ecma_arraybuffer_detach (buffer_p);
if (!detached)
{
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Expects a detachable ArrayBuffer.")));
}
return ECMA_VALUE_NULL;
}
#else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
JERRY_UNUSED (value);
#endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Expects an ArrayBuffer")));
} /* jerry_detach_arraybuffer */
/**
* DataView related functions
*/