1 #include <js_native_api.h>
2 #include "../common.h"
3 #include "../entry_point.h"
4
5 napi_deferred deferred = NULL;
6
createPromise(napi_env env, napi_callback_info info)7 static napi_value createPromise(napi_env env, napi_callback_info info) {
8 napi_value promise;
9
10 // We do not overwrite an existing deferred.
11 if (deferred != NULL) {
12 return NULL;
13 }
14
15 NODE_API_CALL(env, napi_create_promise(env, &deferred, &promise));
16
17 return promise;
18 }
19
20 static napi_value
concludeCurrentPromise(napi_env env, napi_callback_info info)21 concludeCurrentPromise(napi_env env, napi_callback_info info) {
22 napi_value argv[2];
23 size_t argc = 2;
24 bool resolution;
25
26 NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, argv, NULL, NULL));
27 NODE_API_CALL(env, napi_get_value_bool(env, argv[1], &resolution));
28 if (resolution) {
29 NODE_API_CALL(env, napi_resolve_deferred(env, deferred, argv[0]));
30 } else {
31 NODE_API_CALL(env, napi_reject_deferred(env, deferred, argv[0]));
32 }
33
34 deferred = NULL;
35
36 return NULL;
37 }
38
isPromise(napi_env env, napi_callback_info info)39 static napi_value isPromise(napi_env env, napi_callback_info info) {
40 napi_value promise, result;
41 size_t argc = 1;
42 bool is_promise;
43
44 NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, &promise, NULL, NULL));
45 NODE_API_CALL(env, napi_is_promise(env, promise, &is_promise));
46 NODE_API_CALL(env, napi_get_boolean(env, is_promise, &result));
47
48 return result;
49 }
50
51 EXTERN_C_START
Init(napi_env env, napi_value exports)52 napi_value Init(napi_env env, napi_value exports) {
53 napi_property_descriptor descriptors[] = {
54 DECLARE_NODE_API_PROPERTY("createPromise", createPromise),
55 DECLARE_NODE_API_PROPERTY("concludeCurrentPromise", concludeCurrentPromise),
56 DECLARE_NODE_API_PROPERTY("isPromise", isPromise),
57 };
58
59 NODE_API_CALL(env, napi_define_properties(
60 env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
61
62 return exports;
63 }
64 EXTERN_C_END
65