mirror of
https://github.com/jerryscript-project/jerryscript.git
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118 lines
4.0 KiB
C++
118 lines
4.0 KiB
C++
/* Copyright 2015 Samsung Electronics Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmahelpers Helpers for operations with ECMA data types
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* @{
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*/
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#include "ecma-alloc.h"
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#include "ecma-globals.h"
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#include "ecma-helpers.h"
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/**
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* Create internal property with specified identifier and store external pointer in the property.
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*
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* Note:
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* property identifier should be one of the following:
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* - ECMA_INTERNAL_PROPERTY_NATIVE_CODE
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*/
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void
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ecma_create_external_pointer_property (ecma_object_t *obj_p, /**< object to create property in */
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ecma_internal_property_id_t id, /**< identifier of internal
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* property to create */
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ecma_external_pointer_t ptr_value) /**< value to store in the property */
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{
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JERRY_ASSERT (id == ECMA_INTERNAL_PROPERTY_NATIVE_CODE);
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ecma_property_t *prop_p = ecma_create_internal_property (obj_p, id);
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JERRY_STATIC_ASSERT (sizeof (uint32_t) <= sizeof (prop_p->u.internal_property.value));
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if (sizeof (ecma_external_pointer_t) == sizeof (uint32_t))
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{
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prop_p->u.internal_property.value = (uint32_t) ptr_value;
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}
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else
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{
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ecma_external_pointer_t *handler_p = ecma_alloc_external_pointer ();
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*handler_p = ptr_value;
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ECMA_SET_NON_NULL_POINTER (prop_p->u.internal_property.value, handler_p);
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}
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} /* ecma_create_external_pointer_property */
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/**
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* Get value of external pointer stored in the object's property with specified identifier
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*
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* Note:
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* property identifier should be one of the following:
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* - ECMA_INTERNAL_PROPERTY_NATIVE_CODE
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*
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* @return value of the external pointer
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*/
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ecma_external_pointer_t
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ecma_get_external_pointer_value (ecma_object_t *obj_p, /**< object to get property value from */
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ecma_internal_property_id_t id) /**< identifier of internal property
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* to get value from */
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{
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JERRY_ASSERT (id == ECMA_INTERNAL_PROPERTY_NATIVE_CODE);
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ecma_property_t* prop_p = ecma_get_internal_property (obj_p, id);
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JERRY_STATIC_ASSERT (sizeof (uint32_t) <= sizeof (prop_p->u.internal_property.value));
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if (sizeof (ecma_external_pointer_t) == sizeof (uint32_t))
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{
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return (ecma_external_pointer_t) prop_p->u.internal_property.value;
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}
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else
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{
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ecma_external_pointer_t *handler_p = ECMA_GET_NON_NULL_POINTER (ecma_external_pointer_t,
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prop_p->u.internal_property.value);
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return *handler_p;
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}
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} /* ecma_get_external_pointer_value */
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/**
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* Free memory associated with external pointer stored in the property
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*
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* Note:
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* property identifier should be one of the following:
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* - ECMA_INTERNAL_PROPERTY_NATIVE_CODE
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*/
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void
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ecma_free_external_pointer_in_property (ecma_property_t *prop_p) /**< internal property */
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{
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JERRY_ASSERT (prop_p->u.internal_property.type == ECMA_INTERNAL_PROPERTY_NATIVE_CODE);
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if (sizeof (ecma_external_pointer_t) == sizeof (uint32_t))
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{
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/* no additional memory was allocated for the pointer storage */
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}
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else
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{
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ecma_external_pointer_t *handler_p = ECMA_GET_NON_NULL_POINTER (ecma_external_pointer_t,
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prop_p->u.internal_property.value);
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ecma_dealloc_external_pointer (handler_p);
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}
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} /* ecma_free_external_pointer_in_property */
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/**
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* @}
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* @}
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*/
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