1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "demo_javascript_class.h"
17
18 #include "napi/native_api.h"
19 #include "napi/native_node_api.h"
20
21 /*
22 * Sync callback
23 */
Add(napi_env env,napi_callback_info info)24 static napi_value Add(napi_env env, napi_callback_info info)
25 {
26 size_t requireArgc = 2;
27 size_t argc = 2;
28 napi_value args[2] = { nullptr };
29 NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr));
30
31 NAPI_ASSERT(env, argc >= requireArgc, "Wrong number of arguments");
32
33 napi_valuetype valuetype0;
34 NAPI_CALL(env, napi_typeof(env, args[0], &valuetype0));
35
36 napi_valuetype valuetype1;
37 NAPI_CALL(env, napi_typeof(env, args[1], &valuetype1));
38
39 NAPI_ASSERT(env, valuetype0 == napi_number && valuetype1 == napi_number, "Wrong argument type. Numbers expected.");
40
41 double value0;
42 NAPI_CALL(env, napi_get_value_double(env, args[0], &value0));
43
44 double value1;
45 NAPI_CALL(env, napi_get_value_double(env, args[1], &value1));
46
47 napi_value sum;
48 NAPI_CALL(env, napi_create_double(env, value0 + value1, &sum));
49
50 return sum;
51 }
52
53 struct AsyncCallbackInfo {
54 napi_async_work asyncWork = nullptr;
55 napi_deferred deferred = nullptr;
56 napi_ref callback[2] = { 0 };
57 };
58
59 /**
60 * Promise
61 */
TestPromise(napi_env env,napi_callback_info)62 static napi_value TestPromise(napi_env env, napi_callback_info)
63 {
64 napi_deferred deferred = nullptr;
65 napi_value promise = nullptr;
66 NAPI_CALL(env, napi_create_promise(env, &deferred, &promise));
67
68 auto asyncCallbackInfo = new AsyncCallbackInfo {
69 .asyncWork = nullptr,
70 .deferred = deferred,
71 };
72
73 napi_value resourceName = nullptr;
74 napi_create_string_latin1(env, "TestPromise", NAPI_AUTO_LENGTH, &resourceName);
75 napi_create_async_work(
76 env, nullptr, resourceName, [](napi_env env, void* data) {},
77 [](napi_env env, napi_status status, void* data) {
78 AsyncCallbackInfo* asyncCallbackInfo = (AsyncCallbackInfo*)data;
79 napi_value result = nullptr;
80 napi_create_string_utf8(env, "TestPromise", NAPI_AUTO_LENGTH, &result);
81 napi_resolve_deferred(env, asyncCallbackInfo->deferred, result);
82 napi_delete_async_work(env, asyncCallbackInfo->asyncWork);
83 delete asyncCallbackInfo;
84 },
85 (void*)asyncCallbackInfo, &asyncCallbackInfo->asyncWork);
86 napi_queue_async_work(env, asyncCallbackInfo->asyncWork);
87 return promise;
88 }
89
90 /*
91 * Promise or async callback
92 */
TestPromiseOrAsyncCallback(napi_env env,napi_callback_info info)93 static napi_value TestPromiseOrAsyncCallback(napi_env env, napi_callback_info info)
94 {
95 size_t argc = 2;
96 napi_value args[2] = { 0 };
97 napi_value thisArg = nullptr;
98 void* data = nullptr;
99 NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, &thisArg, &data));
100
101 auto asyncCallbackInfo = new AsyncCallbackInfo {
102 .asyncWork = nullptr,
103 .deferred = nullptr,
104 };
105
106 if (argc != 0) {
107 napi_value resourceName = nullptr;
108 napi_create_string_latin1(env, "TestPromiseOrAsyncCallback1", NAPI_AUTO_LENGTH, &resourceName);
109
110 for (size_t i = 0; i < argc; i++) {
111 napi_valuetype valuetype = napi_undefined;
112 NAPI_CALL(env, napi_typeof(env, args[i], &valuetype));
113 NAPI_ASSERT(env, valuetype == napi_function, "Wrong argument type. Function expected.");
114 napi_create_reference(env, args[i], 1, &asyncCallbackInfo->callback[i]);
115 }
116
117 napi_create_async_work(
118 env, nullptr, resourceName, [](napi_env env, void* data) {},
119 [](napi_env env, napi_status status, void* data) {
120 AsyncCallbackInfo* asyncCallbackInfo = (AsyncCallbackInfo*)data;
121
122 napi_value callback = nullptr;
123 napi_value undefined = nullptr;
124 napi_value result = nullptr;
125 napi_value callbackResult = nullptr;
126 napi_create_string_utf8(env, "TestPromiseOrAsyncCallback", NAPI_AUTO_LENGTH, &result);
127 napi_get_undefined(env, &undefined);
128
129 if (true) {
130 napi_get_reference_value(env, asyncCallbackInfo->callback[0], &callback);
131 napi_call_function(env, undefined, callback, 1, &result, &callbackResult);
132 } else {
133 if (asyncCallbackInfo->callback[1]) {
134 napi_get_reference_value(env, asyncCallbackInfo->callback[1], &callback);
135 napi_call_function(env, undefined, callback, 1, &result, &callbackResult);
136 } else {
137 napi_throw_error(env, "error", "foo");
138 }
139 }
140
141 if (asyncCallbackInfo->callback[0] != nullptr) {
142 napi_delete_reference(env, asyncCallbackInfo->callback[0]);
143 }
144 if (asyncCallbackInfo->callback[1] != nullptr) {
145 napi_delete_reference(env, asyncCallbackInfo->callback[1]);
146 }
147 napi_delete_async_work(env, asyncCallbackInfo->asyncWork);
148 delete asyncCallbackInfo;
149 },
150 (void*)asyncCallbackInfo, &asyncCallbackInfo->asyncWork);
151
152 NAPI_CALL(env, napi_queue_async_work(env, asyncCallbackInfo->asyncWork));
153
154 return nullptr;
155 } else {
156 napi_value resourceName = nullptr;
157 napi_create_string_latin1(env, "TestPromiseOrAsyncCallback2", NAPI_AUTO_LENGTH, &resourceName);
158
159 napi_deferred deferred = nullptr;
160 napi_value promise = nullptr;
161 NAPI_CALL(env, napi_create_promise(env, &deferred, &promise));
162
163 asyncCallbackInfo->deferred = deferred;
164
165 napi_create_async_work(
166 env, nullptr, resourceName, [](napi_env env, void* data) {},
167 [](napi_env env, napi_status status, void* data) {
168 AsyncCallbackInfo* asyncCallbackInfo = (AsyncCallbackInfo*)data;
169
170 napi_value result = nullptr;
171 napi_create_string_utf8(env, "TestPromiseOrAsyncCallback", NAPI_AUTO_LENGTH, &result);
172 if (true) {
173 napi_resolve_deferred(env, asyncCallbackInfo->deferred, result);
174 } else {
175 napi_reject_deferred(env, asyncCallbackInfo->deferred, result);
176 }
177
178 napi_delete_async_work(env, asyncCallbackInfo->asyncWork);
179 delete asyncCallbackInfo;
180 },
181 (void*)asyncCallbackInfo, &asyncCallbackInfo->asyncWork);
182 napi_queue_async_work(env, asyncCallbackInfo->asyncWork);
183 return promise;
184 }
185 }
186
187 EXTERN_C_START
188 /*
189 * function for module exports
190 */
Init(napi_env env,napi_value exports)191 static napi_value Init(napi_env env, napi_value exports)
192 {
193 /*
194 * Properties define
195 */
196 napi_property_descriptor desc[] = {
197 DECLARE_NAPI_FUNCTION("add", Add),
198 DECLARE_NAPI_FUNCTION("TestPromise", TestPromise),
199 DECLARE_NAPI_FUNCTION("TestPromiseOrAsyncCallback", TestPromiseOrAsyncCallback),
200 };
201 NAPI_CALL(env, napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc));
202
203 DemoJavascriptClassInit(env, exports);
204
205 return exports;
206 }
207 EXTERN_C_END
208
209 /*
210 * Module define
211 */
212 static napi_module demoModule = {
213 .nm_version = 1,
214 .nm_flags = 0,
215 .nm_filename = nullptr,
216 .nm_register_func = Init,
217 .nm_modname = "demo",
218 .nm_priv = ((void*)0),
219 .reserved = { 0 },
220 };
221 /*
222 * Module register function
223 */
RegisterModule(void)224 extern "C" __attribute__((constructor)) void RegisterModule(void)
225 {
226 napi_module_register(&demoModule);
227 }
228