Open annidy opened 5 months ago
struct CallbackContext { napi_env env = nullptr; napi_ref recvCallbackRef = nullptr; napi_async_work work; double value0 = 0; double value1 = 0; }; void callbackDone(napi_env env, napi_status status, void *data) { CallbackContext* context = (CallbackContext*)data; napi_value recvCallback= nullptr; napi_get_reference_value(context->env, context->recvCallbackRef, &recvCallback); napi_value argv[1]; //argv[0] = thisArg; napi_value ret; napi_create_double(env, context->sum, &argv[0]); napi_call_function(env, nullptr, recvCallback, 1, argv, &ret); napi_delete_reference(context->env, context->recvCallbackRef); napi_delete_async_work(context->env, context->work); delete context; } void callbackPreDo(napi_env env, void *data) { CallbackContext* context = (CallbackContext*)data; context->sum = context->value0 + context->value1; std::this_thread::sleep_for(std::chrono::milliseconds(100)); } void callbackExec(CallbackContext* context) { napi_value resource; napi_create_string_latin1(context->env, "mqttAPI", NAPI_AUTO_LENGTH, &resource); napi_create_async_work(context->env, nullptr, resource, callbackPreDo, callbackDone, context, &context->work); napi_queue_async_work(context->env, context->work);//实现在UI主线程调用 } static napi_value AsyncAdd(napi_env env, napi_callback_info info) { size_t requireArgc = 3; size_t argc = 3; napi_value args[3] = {nullptr}; napi_get_cb_info(env, info, &argc, args , nullptr, nullptr); napi_valuetype valuetype0; napi_typeof(env, args[0], &valuetype0); napi_valuetype valuetype1; napi_typeof(env, args[1], &valuetype1); double value0; napi_get_value_double(env, args[0], &value0); double value1; napi_get_value_double(env, args[1], &value1); napi_ref recvCallbackRef; napi_create_reference(env, args[2], 1, &recvCallbackRef); CallbackContext *context = new CallbackContext; context->env = env; context->recvCallbackRef = recvCallbackRef; context->value0 = value0; context->value1 = value1; callbackExec(context); return nullptr; } EXTERN_C_START static napi_value Init(napi_env env, napi_value exports) { napi_property_descriptor desc[] = { { "async_add", nullptr, AsyncAdd, nullptr, nullptr, nullptr, napi_default, nullptr } }; napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc); return exports; } EXTERN_C_END static napi_module demoModule = { .nm_version =1, .nm_flags = 0, .nm_filename = nullptr, .nm_register_func = Init, .nm_modname = "entry", .nm_priv = ((void*)0), .reserved = { 0 }, }; extern "C" __attribute__((constructor)) void RegisterEntryModule(void) { napi_module_register(&demoModule); }
index.d.ts
export const async_add: (a: number, b: number, c: (number) => void) => number;
index.ets
import hilog from '@ohos.hilog'; import entry from 'libentry.so' @Entry @Component struct Index { @State message: string = 'Hello World' build() { Row() { Column() { Button("Async") .onClick(() => { entry.async_add(3, 4, (value) => { hilog.info(0x0000, 'testTag', 'Async 3 + 4 = %{public}d', value); }) }) } .width('100%') } .height('100%') } }
在这里有原始的基于libuv的示例js_callback.cpp 新的napi引入了NativeAsyncWork对象,进一步包装了libuv,增加了cancel、defer等回调
index.d.ts
index.ets