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jerryscript/jerry-core/ecma/operations/ecma-promise-object.c
Zoltan Herczeg 838e74df0f Remove include jerryscript.h from jrt.h. (#1803) 
Fixes #1791.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2017-05-11 12:42:47 +02:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ecma-boolean-object.h"
#include "ecma-builtins.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-jobqueue.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-promise-object.h"
#ifndef CONFIG_DISABLE_ES2015_PROMISE_BUILTIN
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmapromiseobject ECMA Promise object related routines
* @{
*/
/**
* Check if an object is promise.
*
* @return true - if the object is a promise.
* false - otherwise.
*/
inline bool __attr_always_inline___
ecma_is_promise (ecma_object_t *obj_p) /**< points to object */
{
return ecma_object_class_is (obj_p, LIT_MAGIC_STRING_PROMISE_UL);
} /* ecma_is_promise */
/**
* Get the result of the promise.
*
* @return ecma value of the promise result.
* Returned value must be freed with ecma_free_value
*/
inline ecma_value_t
ecma_promise_get_result (ecma_object_t *obj_p) /**< points to promise object */
{
JERRY_ASSERT (ecma_is_promise (obj_p));
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
return ecma_copy_value (ext_object_p->u.class_prop.u.value);
} /* ecma_promise_get_result */
/**
* Set the PromiseResult of promise.
*/
inline void __attr_always_inline___
ecma_promise_set_result (ecma_object_t *obj_p, /**< points to promise object */
ecma_value_t result) /**< the result value */
{
JERRY_ASSERT (ecma_is_promise (obj_p));
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
JERRY_ASSERT (ext_object_p->u.class_prop.u.value == ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED));
ext_object_p->u.class_prop.u.value = result;
} /* ecma_promise_set_result */
/**
* Get the PromiseState of promise.
*
* @return the state's enum value
*/
inline uint8_t __attr_always_inline___
ecma_promise_get_state (ecma_object_t *obj_p) /**< points to promise object */
{
JERRY_ASSERT (ecma_is_promise (obj_p));
return ((ecma_promise_object_t *) obj_p)->state;
} /* ecma_promise_get_state */
/**
* Set the PromiseState of promise.
*/
inline void __attr_always_inline___
ecma_promise_set_state (ecma_object_t *obj_p, /**< points to promise object */
uint8_t state) /**< the state */
{
JERRY_ASSERT (ecma_is_promise (obj_p));
((ecma_promise_object_t *) obj_p)->state = state;
} /* ecma_promise_set_state */
/**
* Get the bool value of alreadyResolved.
*
* @return bool value of alreadyResolved.
*/
static bool
ecma_get_already_resolved_bool_value (ecma_value_t already_resolved) /**< the alreadyResolved */
{
JERRY_ASSERT (ecma_is_value_object (already_resolved));
ecma_object_t *already_resolved_p = ecma_get_object_from_value (already_resolved);
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) already_resolved_p;
JERRY_ASSERT (ext_object_p->u.class_prop.class_id == LIT_MAGIC_STRING_BOOLEAN_UL);
return ext_object_p->u.class_prop.u.value == ecma_make_boolean_value (true);
} /* ecma_get_already_resolved_bool_value */
/**
* Set the value of alreadyResolved.
*/
static void
ecma_set_already_resolved_value (ecma_value_t already_resolved, /**< the alreadyResolved */
bool value) /**< the value to set */
{
JERRY_ASSERT (ecma_is_value_object (already_resolved));
ecma_object_t *already_resolved_p = ecma_get_object_from_value (already_resolved);
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) already_resolved_p;
JERRY_ASSERT (ext_object_p->u.class_prop.class_id == LIT_MAGIC_STRING_BOOLEAN_UL);
ext_object_p->u.class_prop.u.value = ecma_make_boolean_value (value);
} /* ecma_set_already_resolved_value */
/**
* Take a collection of Reactions and enqueue a new PromiseReactionJob for each Reaction.
*
* See also: ES2015 25.4.1.8
*/
static void
ecma_promise_trigger_reactions (ecma_collection_header_t *reactions, /**< lists of reactions */
ecma_value_t value) /**< value for resolve or reject */
{
ecma_collection_iterator_t iter;
ecma_collection_iterator_init (&iter, reactions);
while (ecma_collection_iterator_next (&iter))
{
ecma_enqueue_promise_reaction_job (*iter.current_value_p, value);
}
ecma_free_values_collection (reactions, false);
} /* ecma_promise_trigger_reactions */
/**
* Reject a Promise with a reason.
*
* See also: ES2015 25.4.1.7
*/
static void
ecma_reject_promise (ecma_value_t promise, /**< promise */
ecma_value_t reason) /**< reason for reject */
{
ecma_object_t *obj_p = ecma_get_object_from_value (promise);
JERRY_ASSERT (ecma_promise_get_state (obj_p) == ECMA_PROMISE_STATE_PENDING);
ecma_promise_set_state (obj_p, ECMA_PROMISE_STATE_REJECTED);
ecma_promise_set_result (obj_p, ecma_copy_value_if_not_object (reason));
ecma_promise_object_t *promise_p = (ecma_promise_object_t *) obj_p;
ecma_promise_trigger_reactions (promise_p->reject_reactions, reason);
promise_p->reject_reactions = ecma_new_values_collection (NULL, 0, false);
/* Free all fullfill_reactions. */
ecma_free_values_collection (promise_p->fulfill_reactions, false);
promise_p->fulfill_reactions = ecma_new_values_collection (NULL, 0, false);
} /* ecma_reject_promise */
/**
* Fulfill a Promise with a value.
*
* See also: ES2015 25.4.1.4
*/
static void
ecma_fulfill_promise (ecma_value_t promise, /**< promise */
ecma_value_t value) /**< fulfilled value */
{
ecma_object_t *obj_p = ecma_get_object_from_value (promise);
JERRY_ASSERT (ecma_promise_get_state (obj_p) == ECMA_PROMISE_STATE_PENDING);
ecma_promise_set_state (obj_p, ECMA_PROMISE_STATE_FULFILLED);
ecma_promise_set_result (obj_p, ecma_copy_value_if_not_object (value));
ecma_promise_object_t *promise_p = (ecma_promise_object_t *) obj_p;
ecma_promise_trigger_reactions (promise_p->fulfill_reactions, value);
promise_p->fulfill_reactions = ecma_new_values_collection (NULL, 0, false);
/* Free all reject_reactions. */
ecma_free_values_collection (promise_p->reject_reactions, false);
promise_p->reject_reactions = ecma_new_values_collection (NULL, 0, false);
} /* ecma_fulfill_promise */
/**
* Native handler for Promise Reject Function.
*
* See also: ES2015 25.4.1.3.1
*
* @return ecma value of undefined.
*/
static ecma_value_t
ecma_promise_reject_handler (const ecma_value_t function, /**< the function itself */
const ecma_value_t this, /**< this_arg of the function */
const ecma_value_t argv[], /**< argument list */
const ecma_length_t argc) /**< argument number */
{
JERRY_UNUSED (this);
JERRY_UNUSED (argc);
ecma_string_t str_promise;
ecma_string_t str_already_resolved;
ecma_init_ecma_magic_string (&str_promise, LIT_INTERNAL_MAGIC_STRING_PROMISE);
ecma_init_ecma_magic_string (&str_already_resolved, LIT_INTERNAL_MAGIC_STRING_ALREADY_RESOLVED);
ecma_object_t *function_p = ecma_get_object_from_value (function);
/* 2. */
ecma_value_t promise = ecma_op_object_get (function_p, &str_promise);
/* 1. */
JERRY_ASSERT (ecma_is_promise (ecma_get_object_from_value (promise)));
/* 3. */
ecma_value_t already_resolved = ecma_op_object_get (function_p, &str_already_resolved);
/* 4. */
if (ecma_get_already_resolved_bool_value (already_resolved))
{
ecma_free_value (promise);
ecma_free_value (already_resolved);
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
}
/* 5. */
ecma_set_already_resolved_value (already_resolved, true);
/* 6. */
ecma_reject_promise (promise, argv[0]);
ecma_free_value (promise);
ecma_free_value (already_resolved);
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
} /* ecma_promise_reject_handler */
/**
* Native handler for Promise Resolve Function.
*
* See also: ES2015 25.4.1.3.2
*
* @return ecma value of undefined.
*/
static ecma_value_t
ecma_promise_resolve_handler (const ecma_value_t function, /**< the function itself */
const ecma_value_t this, /**< this_arg of the function */
const ecma_value_t argv[], /**< argument list */
const ecma_length_t argc) /**< argument number */
{
JERRY_UNUSED (this);
JERRY_UNUSED (argc);
ecma_string_t str_promise;
ecma_string_t str_already_resolved;
ecma_init_ecma_magic_string (&str_promise, LIT_INTERNAL_MAGIC_STRING_PROMISE);
ecma_init_ecma_magic_string (&str_already_resolved, LIT_INTERNAL_MAGIC_STRING_ALREADY_RESOLVED);
ecma_object_t *function_p = ecma_get_object_from_value (function);
/* 2. */
ecma_value_t promise = ecma_op_object_get (function_p, &str_promise);
/* 1. */
JERRY_ASSERT (ecma_is_promise (ecma_get_object_from_value (promise)));
/* 3. */
ecma_value_t already_resolved = ecma_op_object_get (function_p, &str_already_resolved);
/* 4. */
if (ecma_get_already_resolved_bool_value (already_resolved))
{
goto end_of_resolve_function;
}
/* 5. */
ecma_set_already_resolved_value (already_resolved, true);
/* 6. */
if (argv[0] == promise)
{
ecma_object_t *error_p = ecma_new_standard_error (ECMA_ERROR_TYPE);
ecma_reject_promise (promise, ecma_make_object_value (error_p));
ecma_deref_object (error_p);
goto end_of_resolve_function;
}
/* 7. */
if (!ecma_is_value_object (argv[0]))
{
ecma_fulfill_promise (promise, argv[0]);
goto end_of_resolve_function;
}
/* 8. */
ecma_string_t *str_then = ecma_new_ecma_string_from_magic_string_id (LIT_MAGIC_STRING_THEN);
ecma_value_t then = ecma_op_object_get (ecma_get_object_from_value (argv[0]), str_then);
if (ECMA_IS_VALUE_ERROR (then))
{
/* 9. */
ecma_reject_promise (promise, then);
}
else if (!ecma_op_is_callable (then))
{
/* 11 .*/
ecma_fulfill_promise (promise, argv[0]);
}
else
{
/* 12 */
ecma_enqueue_promise_resolve_thenable_job (promise, argv[0], then);
}
ecma_deref_ecma_string (str_then);
ecma_free_value (then);
end_of_resolve_function:
ecma_free_value (promise);
ecma_free_value (already_resolved);
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
} /* ecma_promise_resolve_handler */
/**
* CapabilityiesExecutor Function.
*
* See also: ES2015 25.4.1.5.1
*
* @return ecma value of undefined or typerror.
* Returned value must be freed with ecma_free_value
*/
static ecma_value_t
ecma_call_builtin_executor (ecma_object_t *executor_p, /**< the executor object */
ecma_value_t resolve_func, /**< the resolve function */
ecma_value_t reject_func) /**< the reject function */
{
ecma_string_t *str_capability = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_CAPABILITY);
ecma_string_t *str_resolve = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_RESOLVE);
ecma_string_t *str_reject = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_REJECT);
/* 2. */
ecma_value_t capability = ecma_op_object_get (executor_p, str_capability);
/* 3. */
ecma_value_t resolve = ecma_op_object_get (ecma_get_object_from_value (capability), str_resolve);
if (resolve != ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED))
{
ecma_free_value (resolve);
ecma_free_value (capability);
ecma_deref_ecma_string (str_capability);
ecma_deref_ecma_string (str_resolve);
ecma_deref_ecma_string (str_reject);
return ecma_raise_type_error (ECMA_ERR_MSG ("'resolve' function should be undefined."));
}
/* 4. */
ecma_value_t reject = ecma_op_object_get (ecma_get_object_from_value (capability), str_reject);
if (reject != ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED))
{
ecma_free_value (reject);
ecma_free_value (capability);
ecma_deref_ecma_string (str_capability);
ecma_deref_ecma_string (str_resolve);
ecma_deref_ecma_string (str_reject);
return ecma_raise_type_error (ECMA_ERR_MSG ("'reject' function should be undefined."));
}
/* 5. */
ecma_op_object_put (ecma_get_object_from_value (capability),
str_resolve,
resolve_func,
false);
/* 6. */
ecma_op_object_put (ecma_get_object_from_value (capability),
str_reject,
reject_func,
false);
ecma_free_value (capability);
ecma_deref_ecma_string (str_capability);
ecma_deref_ecma_string (str_resolve);
ecma_deref_ecma_string (str_reject);
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
} /* ecma_call_builtin_executor */
/**
* Create a PromiseCreateResovingFucntions.
*
* See also: ES2015 25.4.1.3
*
* @return pointer to the resolving functions
*/
static ecma_promise_resolving_functions_t *
ecma_promise_create_resolving_functions (ecma_object_t *object_p) /**< the promise object */
{
/* 1. */
ecma_value_t already_resolved = ecma_op_create_boolean_object (ecma_make_boolean_value (false));
ecma_string_t str_promise;
ecma_string_t str_already_resolved;
ecma_init_ecma_magic_string (&str_promise, LIT_INTERNAL_MAGIC_STRING_PROMISE);
ecma_init_ecma_magic_string (&str_already_resolved, LIT_INTERNAL_MAGIC_STRING_ALREADY_RESOLVED);
/* 2. */
ecma_object_t *resolve_p;
resolve_p = ecma_op_create_external_function_object (ecma_promise_resolve_handler);
/* 3. */
ecma_op_object_put (resolve_p,
&str_promise,
ecma_make_object_value (object_p),
false);
/* 4. */
ecma_op_object_put (resolve_p,
&str_already_resolved,
already_resolved,
false);
/* 5. */
ecma_object_t *reject_p;
reject_p = ecma_op_create_external_function_object (ecma_promise_reject_handler);
/* 6. */
ecma_op_object_put (reject_p,
&str_promise,
ecma_make_object_value (object_p),
false);
/* 7. */
ecma_op_object_put (reject_p,
&str_already_resolved,
already_resolved,
false);
/* 8. */
ecma_promise_resolving_functions_t *funcs = jmem_heap_alloc_block (sizeof (ecma_promise_resolving_functions_t));
funcs->resolve = ecma_make_object_value (resolve_p);
funcs->reject = ecma_make_object_value (reject_p);
ecma_free_value (already_resolved);
return funcs;
} /* ecma_promise_create_resolving_functions */
/**
* Free the heap and the member of the resolving functions.
*/
static void
ecma_promise_free_resolving_functions (ecma_promise_resolving_functions_t *funcs) /**< points to the functions */
{
ecma_free_value (funcs->resolve);
ecma_free_value (funcs->reject);
jmem_heap_free_block (funcs, sizeof (ecma_promise_resolving_functions_t));
} /* ecma_promise_free_resolving_functions */
/**
* Create a promise object.
*
* See also: ES2015 25.4.3.1
*
* @return ecma value of the new promise object
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_create_promise_object (ecma_value_t executor, /**< the executor function or object */
ecma_promise_executor_type_t type) /**< indicates the type of executor */
{
/* 3. */
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_PROMISE_PROTOTYPE);
ecma_object_t *object_p = ecma_create_object (prototype_obj_p,
sizeof (ecma_promise_object_t),
ECMA_OBJECT_TYPE_CLASS);
ecma_deref_object (prototype_obj_p);
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_PROMISE_UL;
ext_object_p->u.class_prop.u.value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
ecma_promise_object_t *promise_object_p = (ecma_promise_object_t *) object_p;
promise_object_p->fulfill_reactions = NULL;
promise_object_p->reject_reactions = NULL;
/* 5 */
ecma_promise_set_state (object_p, ECMA_PROMISE_STATE_PENDING);
/* 6-7. */
promise_object_p->fulfill_reactions = ecma_new_values_collection (NULL, 0, false);
promise_object_p->reject_reactions = ecma_new_values_collection (NULL, 0, false);
/* 8. */
ecma_promise_resolving_functions_t *funcs = ecma_promise_create_resolving_functions (object_p);
ecma_string_t str_resolve, str_reject;
ecma_init_ecma_magic_string (&str_resolve, LIT_INTERNAL_MAGIC_STRING_RESOLVE_FUNCTION);
ecma_init_ecma_magic_string (&str_reject, LIT_INTERNAL_MAGIC_STRING_REJECT_FUNCTION);
ecma_op_object_put (object_p,
&str_resolve,
funcs->resolve,
false);
ecma_op_object_put (object_p,
&str_reject,
funcs->reject,
false);
/* 9. */
ecma_value_t completion = ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
if (type == ECMA_PROMISE_EXECUTOR_FUNCTION)
{
JERRY_ASSERT (ecma_op_is_callable (executor));
ecma_value_t argv[] = { funcs->resolve, funcs->reject };
completion = ecma_op_function_call (ecma_get_object_from_value (executor),
ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED),
argv,
2);
}
else if (type == ECMA_PROMISE_EXECUTOR_OBJECT)
{
JERRY_ASSERT (ecma_is_value_object (executor));
completion = ecma_call_builtin_executor (ecma_get_object_from_value (executor),
funcs->resolve,
funcs->reject);
}
else
{
JERRY_ASSERT (type == ECMA_PROMISE_EXECUTOR_EMPTY);
JERRY_UNUSED (executor);
}
ecma_value_t status = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
if (ECMA_IS_VALUE_ERROR (completion))
{
/* 10.a. */
completion = ecma_get_value_from_error_value (completion);
status = ecma_op_function_call (ecma_get_object_from_value (funcs->reject),
ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED),
&completion,
1);
}
ecma_promise_free_resolving_functions (funcs);
ecma_free_value (completion);
/* 10.b. */
if (ECMA_IS_VALUE_ERROR (status))
{
ecma_deref_object (object_p);
return status;
}
/* 11. */
ecma_free_value (status);
return ecma_make_object_value (object_p);
} /* ecma_op_create_promise_object */
/**
* Create a new PromiseCapability.
*
* See also: ES2015 25.4.1.5
*
* @return ecma value of the new PromiseCapability
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_promise_new_capability (void)
{
/* 3. */
ecma_object_t *capability_p = ecma_op_create_object_object_noarg ();
ecma_string_t *str_capability = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_CAPABILITY);
ecma_string_t *str_promise = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_PROMISE);
/* 4. */
ecma_object_t *executor_p;
executor_p = ecma_op_create_object_object_noarg ();
ecma_value_t executor = ecma_make_object_value (executor_p);
/* 5. */
ecma_op_object_put (executor_p,
str_capability,
ecma_make_object_value (capability_p),
false);
/* 6. */
ecma_value_t promise = ecma_op_create_promise_object (executor, ECMA_PROMISE_EXECUTOR_OBJECT);
/* 10. */
ecma_op_object_put (capability_p,
str_promise,
promise,
false);
ecma_deref_object (executor_p);
ecma_deref_ecma_string (str_promise);
ecma_deref_ecma_string (str_capability);
/* 7. */
if (ECMA_IS_VALUE_ERROR (promise))
{
ecma_free_value (promise);
ecma_deref_object (capability_p);
return promise;
}
ecma_free_value (promise);
/* 8. */
ecma_string_t *str_resolve = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_RESOLVE);
ecma_value_t resolve = ecma_op_object_get (capability_p, str_resolve);
ecma_deref_ecma_string (str_resolve);
if (!ecma_op_is_callable (resolve))
{
ecma_free_value (resolve);
ecma_deref_object (capability_p);
return ecma_raise_type_error (ECMA_ERR_MSG ("'resolve' parameter must be callable."));
}
ecma_free_value (resolve);
/* 9. */
ecma_string_t *str_reject = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_REJECT);
ecma_value_t reject = ecma_op_object_get (capability_p, str_reject);
ecma_deref_ecma_string (str_reject);
if (!ecma_op_is_callable (reject))
{
ecma_free_value (reject);
ecma_deref_object (capability_p);
return ecma_raise_type_error (ECMA_ERR_MSG ("'reject' parameter must be callable."));
}
ecma_free_value (reject);
/* 11. */
return ecma_make_object_value (capability_p);
} /* ecma_promise_new_capability */
/**
* It performs the "then" operation on promiFulfilled
* and onRejected as its settlement actions.
*
* See also: 25.4.5.3.1
*
* @return ecma value of the new promise object
* Returned value must be freed with ecma_free_value
*/
static ecma_value_t
ecma_promise_do_then (ecma_value_t promise, /**< the promise which call 'then' */
ecma_value_t on_fulfilled, /**< on_fulfilled function */
ecma_value_t on_rejected, /**< on_rejected function */
ecma_value_t result_capability) /**< promise capability */
{
ecma_string_t *str_capability = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_CAPABILITY);
ecma_string_t *str_handler = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_HANDLER);
ecma_string_t *str_promise = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_PROMISE);
/* 3. boolean true indicates "indentity" */
if (!ecma_op_is_callable (on_fulfilled))
{
on_fulfilled = ecma_make_boolean_value (true);
}
/* 4. boolean false indicates "thrower" */
if (!ecma_op_is_callable (on_rejected))
{
on_rejected = ecma_make_boolean_value (false);
}
/* 5-6. */
ecma_object_t *fulfill_reaction_p = ecma_op_create_object_object_noarg ();
ecma_object_t *reject_reaction_p = ecma_op_create_object_object_noarg ();
ecma_op_object_put (fulfill_reaction_p,
str_capability,
result_capability,
false);
ecma_op_object_put (fulfill_reaction_p,
str_handler,
on_fulfilled,
false);
ecma_op_object_put (reject_reaction_p,
str_capability,
result_capability,
false);
ecma_op_object_put (reject_reaction_p,
str_handler,
on_rejected,
false);
ecma_object_t *obj_p = ecma_get_object_from_value (promise);
ecma_promise_object_t *promise_p = (ecma_promise_object_t *) obj_p;
if (ecma_promise_get_state (obj_p) == ECMA_PROMISE_STATE_PENDING)
{
/* 7. */
ecma_append_to_values_collection (promise_p->fulfill_reactions,
ecma_make_object_value (fulfill_reaction_p),
false);
ecma_append_to_values_collection (promise_p->reject_reactions,
ecma_make_object_value (reject_reaction_p),
false);
}
else if (ecma_promise_get_state (obj_p) == ECMA_PROMISE_STATE_FULFILLED)
{
/* 8. */
ecma_value_t value = ecma_promise_get_result (obj_p);
ecma_enqueue_promise_reaction_job (ecma_make_object_value (fulfill_reaction_p), value);
ecma_free_value (value);
}
else
{
/* 9. */
ecma_value_t reason = ecma_promise_get_result (obj_p);
ecma_enqueue_promise_reaction_job (ecma_make_object_value (reject_reaction_p), reason);
ecma_free_value (reason);
}
/* 10. */
ecma_value_t ret = ecma_op_object_get (ecma_get_object_from_value (result_capability), str_promise);
ecma_deref_object (fulfill_reaction_p);
ecma_deref_object (reject_reaction_p);
ecma_deref_ecma_string (str_capability);
ecma_deref_ecma_string (str_handler);
ecma_deref_ecma_string (str_promise);
return ret;
} /* ecma_promise_do_then */
/**
* The common function for ecma_builtin_promise_prototype_then
* and ecma_builtin_promise_prototype_catch.
*
* @return ecma value of a new promise object.
* Returned value must be freed with ecma_free_value.
*/
ecma_value_t
ecma_promise_then (ecma_value_t promise, /**< the promise which call 'then' */
ecma_value_t on_fulfilled, /**< on_fulfilled function */
ecma_value_t on_rejected) /**< on_rejected function */
{
ecma_object_t *obj = ecma_get_object_from_value (promise);
if (!ecma_is_promise (obj))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("'this' is not a Promise."));
}
ecma_value_t result_capability = ecma_promise_new_capability ();
if (ECMA_IS_VALUE_ERROR (result_capability))
{
return result_capability;
}
ecma_value_t ret = ecma_promise_do_then (promise, on_fulfilled, on_rejected, result_capability);
ecma_free_value (result_capability);
return ret;
} /* ecma_promise_then */
/**
* @}
* @}
*/
#endif /* !CONFIG_DISABLE_ES2015_PROMISE_BUILTIN */
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