1 #include <stdlib.h>
2 #include "node_api.h"
3 #include "uv.h"
4 #include "../../js-native-api/common.h"
5
RunInCallbackScope(napi_env env,napi_callback_info info)6 static napi_value RunInCallbackScope(napi_env env, napi_callback_info info) {
7 size_t argc;
8 napi_value args[3];
9
10 NAPI_CALL(env, napi_get_cb_info(env, info, &argc, NULL, NULL, NULL));
11 NAPI_ASSERT(env, argc == 3 , "Wrong number of arguments");
12
13 NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
14
15 napi_valuetype valuetype;
16 NAPI_CALL(env, napi_typeof(env, args[0], &valuetype));
17 NAPI_ASSERT(env, valuetype == napi_object,
18 "Wrong type of arguments. Expects an object as first argument.");
19
20 NAPI_CALL(env, napi_typeof(env, args[1], &valuetype));
21 NAPI_ASSERT(env, valuetype == napi_string,
22 "Wrong type of arguments. Expects a string as second argument.");
23
24 NAPI_CALL(env, napi_typeof(env, args[2], &valuetype));
25 NAPI_ASSERT(env, valuetype == napi_function,
26 "Wrong type of arguments. Expects a function as third argument.");
27
28 napi_async_context context;
29 NAPI_CALL(env, napi_async_init(env, args[0], args[1], &context));
30
31 napi_callback_scope scope = NULL;
32 NAPI_CALL(
33 env,
34 napi_open_callback_scope(env,
35 args[0],
36 context,
37 &scope));
38
39 // if the function has an exception pending after the call that is ok
40 // so we don't use NAPI_CALL as we must close the callback scope regardless
41 napi_value result = NULL;
42 napi_status function_call_result =
43 napi_call_function(env, args[0], args[2], 0, NULL, &result);
44 if (function_call_result != napi_ok) {
45 GET_AND_THROW_LAST_ERROR((env));
46 }
47
48 NAPI_CALL(env, napi_close_callback_scope(env, scope));
49 NAPI_CALL(env, napi_async_destroy(env, context));
50
51 return result;
52 }
53
54 static napi_env shared_env = NULL;
55 static napi_deferred deferred = NULL;
56
Callback(uv_work_t * req,int ignored)57 static void Callback(uv_work_t* req, int ignored) {
58 napi_env env = shared_env;
59
60 napi_handle_scope handle_scope = NULL;
61 NAPI_CALL_RETURN_VOID(env, napi_open_handle_scope(env, &handle_scope));
62
63 napi_value resource_name;
64 NAPI_CALL_RETURN_VOID(env, napi_create_string_utf8(
65 env, "test", NAPI_AUTO_LENGTH, &resource_name));
66 napi_async_context context;
67 NAPI_CALL_RETURN_VOID(env,
68 napi_async_init(env, NULL, resource_name, &context));
69
70 napi_value resource_object;
71 NAPI_CALL_RETURN_VOID(env, napi_create_object(env, &resource_object));
72
73 napi_value undefined_value;
74 NAPI_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined_value));
75
76 napi_callback_scope scope = NULL;
77 NAPI_CALL_RETURN_VOID(env, napi_open_callback_scope(env,
78 resource_object,
79 context,
80 &scope));
81
82 NAPI_CALL_RETURN_VOID(env,
83 napi_resolve_deferred(env, deferred, undefined_value));
84
85 NAPI_CALL_RETURN_VOID(env, napi_close_callback_scope(env, scope));
86
87 NAPI_CALL_RETURN_VOID(env, napi_close_handle_scope(env, handle_scope));
88 NAPI_CALL_RETURN_VOID(env, napi_async_destroy(env, context));
89 free(req);
90 }
91
NoopWork(uv_work_t * work)92 static void NoopWork(uv_work_t* work) { (void) work; }
93
TestResolveAsync(napi_env env,napi_callback_info info)94 static napi_value TestResolveAsync(napi_env env, napi_callback_info info) {
95 napi_value promise = NULL;
96 if (deferred == NULL) {
97 shared_env = env;
98 NAPI_CALL(env, napi_create_promise(env, &deferred, &promise));
99
100 uv_loop_t* loop = NULL;
101 NAPI_CALL(env, napi_get_uv_event_loop(env, &loop));
102
103 uv_work_t* req = malloc(sizeof(*req));
104 uv_queue_work(loop,
105 req,
106 NoopWork,
107 Callback);
108 }
109 return promise;
110 }
111
Init(napi_env env,napi_value exports)112 static napi_value Init(napi_env env, napi_value exports) {
113 napi_property_descriptor descriptors[] = {
114 DECLARE_NAPI_PROPERTY("runInCallbackScope", RunInCallbackScope),
115 DECLARE_NAPI_PROPERTY("testResolveAsync", TestResolveAsync)
116 };
117
118 NAPI_CALL(env, napi_define_properties(
119 env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
120
121 return exports;
122 }
123
124 NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)
125