1 /*
2 * Copyright (c) 2025 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 "napi/native_api.h"
17
18 static constexpr int INT_ARGS_2 = 2; // 入参索引
19
20 struct CallbackData {
21 napi_async_work asyncWork = nullptr;
22 napi_ref callbackRef = nullptr;
23 double args[2] = {0};
24 double result = 0;
25 };
26
ExecuteCB(napi_env env,void * data)27 static void ExecuteCB(napi_env env, void *data)
28 {
29 CallbackData *callbackData = reinterpret_cast<CallbackData *>(data);
30 callbackData->result = callbackData->args[0] + callbackData->args[1];
31 }
32
CompleteCB(napi_env env,napi_status status,void * data)33 static void CompleteCB(napi_env env, napi_status status, void *data)
34 {
35 CallbackData *callbackData = reinterpret_cast<CallbackData *>(data);
36 napi_value callbackArg[1] = {nullptr};
37 napi_create_double(env, callbackData->result, &callbackArg[0]);
38 napi_value callback = nullptr;
39 napi_get_reference_value(env, callbackData->callbackRef, &callback);
40 // 执行回调函数
41 napi_value result;
42 napi_value undefined;
43 napi_get_undefined(env, &undefined);
44 napi_call_function(env, undefined, callback, 1, callbackArg, &result);
45 // 删除napi_ref对象以及异步任务
46 napi_delete_reference(env, callbackData->callbackRef);
47 napi_delete_async_work(env, callbackData->asyncWork);
48 delete callbackData;
49 }
50
AsyncWork(napi_env env,napi_callback_info info)51 napi_value AsyncWork(napi_env env, napi_callback_info info)
52 {
53 size_t argc = 3;
54 napi_value args[3];
55 napi_get_cb_info(env, info, &argc, args, nullptr, nullptr);
56 auto asyncContext = new CallbackData();
57 // 将接收到的参数保存到callbackData
58 napi_get_value_double(env, args[0], &asyncContext->args[0]);
59 napi_get_value_double(env, args[1], &asyncContext->args[1]);
60 // 将传入的callback转换为napi_ref延长其生命周期，防止被GC掉
61 napi_create_reference(env, args[INT_ARGS_2], 1, &asyncContext->callbackRef);
62 napi_value resourceName = nullptr;
63 napi_create_string_utf8(env, "asyncWorkCallback", NAPI_AUTO_LENGTH, &resourceName);
64 // 创建异步任务
65 napi_create_async_work(env, nullptr, resourceName, ExecuteCB, CompleteCB,
66 asyncContext, &asyncContext->asyncWork);
67 // 将异步任务加入队列
68 napi_queue_async_work(env, asyncContext->asyncWork);
69 return nullptr;
70 }
71
72 // 模块初始化
Init(napi_env env,napi_value exports)73 static napi_value Init(napi_env env, napi_value exports)
74 {
75 napi_property_descriptor desc[] = {
76 { "asyncWork", nullptr, AsyncWork, nullptr, nullptr, nullptr, napi_default, nullptr }
77 };
78 napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
79 return exports;
80 }
81
82 static napi_module demoModule = {
83 .nm_version = 1,
84 .nm_flags = 0,
85 .nm_filename = nullptr,
86 .nm_register_func = Init,
87 .nm_modname = "entry1",
88 .nm_priv = ((void*)0),
89 .reserved = { 0 },
90 };
91
RegisterEntryModule(void)92 extern "C" __attribute__((constructor)) void RegisterEntryModule(void)
93 {
94 napi_module_register(&demoModule);
95 }