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Introduce new Promise API methods (#3186)

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The new API methods make it possible to get a Promise object's
result and it's state.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com
This commit is contained in:
Péter Gál
2019-10-28 14:07:37 +01:00
committed by Dániel Bátyai
parent 351b88184c
commit eebbed143d
6 changed files with 440 additions and 3 deletions
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jerry-core/api/jerry.c
+62
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@@ -71,6 +71,14 @@ JERRY_STATIC_ASSERT ((int) RE_FLAG_GLOBAL == (int) JERRY_REGEXP_FLAG_GLOBAL
re_flags_t_must_be_equal_to_jerry_regexp_flags_t);
#endif /* ENABLED (JERRY_BUILTIN_REGEXP) */
#if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
/* The internal ECMA_PROMISE_STATE_* values are "one byte away" from the API values */
JERRY_STATIC_ASSERT (((ECMA_PROMISE_STATE_PENDING + 1) == JERRY_PROMISE_STATE_PENDING)
&& ((ECMA_PROMISE_STATE_FULFILLED + 1) == JERRY_PROMISE_STATE_FULFILLED)
&& ((ECMA_PROMISE_STATE_REJECTED + 1) == JERRY_PROMISE_STATE_REJECTED),
promise_internal_state_matches_external);
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
#if !ENABLED (JERRY_PARSER) && !ENABLED (JERRY_SNAPSHOT_EXEC)
#error "JERRY_SNAPSHOT_EXEC must be enabled if JERRY_PARSER is disabled!"
#endif /* !ENABLED (JERRY_PARSER) && !ENABLED (JERRY_SNAPSHOT_EXEC) */
@@ -3084,6 +3092,60 @@ jerry_resolve_or_reject_promise (jerry_value_t promise, /**< the promise value *
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
} /* jerry_resolve_or_reject_promise */
/**
* Get the result of a promise.
*
* @return - Promise result
* - Type error if the promise support was not enabled or the input was not a promise object
*/
jerry_value_t
jerry_get_promise_result (const jerry_value_t promise) /**< promise object to get the result from */
{
jerry_assert_api_available ();
#if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
if (!jerry_value_is_promise (promise))
{
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
}
return ecma_promise_get_result (ecma_get_object_from_value (promise));
#else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
JERRY_UNUSED (promise);
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Promise not supported.")));
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
} /* jerry_get_promise_result */
/**
* Get the state of a promise object.
*
* @return - the state of the promise (one of the jerry_promise_state_t enum values)
* - JERRY_PROMISE_STATE_NONE is only returned if the input is not a promise object
* or the promise support was not enabled.
*/
jerry_promise_state_t
jerry_get_promise_state (const jerry_value_t promise) /**< promise object to get the state from */
{
jerry_assert_api_available ();
#if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
if (!jerry_value_is_promise (promise))
{
return JERRY_PROMISE_STATE_NONE;
}
uint8_t state = ecma_promise_get_state (ecma_get_object_from_value (promise));
JERRY_ASSERT (state < ECMA_PROMISE_STATE__COUNT);
/* Static assert above guarantees the mapping from internal type to external type. */
return (jerry_promise_state_t) (state + 1);
#else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
JERRY_UNUSED (promise);
return JERRY_PROMISE_STATE_NONE;
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
} /* jerry_get_promise_state */
/**
* Call the SymbolDescriptiveString ecma builtin operation on the symbol value.
*