Freaks City

This article builds upon the foundation of porting third-party libraries to OpenHarmony NAPI. We'll modify the hellonapi.cpp and index.ets files to explore asynchronous operations using Promises and Callbacks within the NAPI framework. This guide includes three examples: a Callback-based asynchronous interface, a Promise-based asynchronous inte ...

NAPI Data Type Convresion Overview OpenHarmony NAPI encapsulates ECMAScript standard data types including Boolean, Null, Undefined, Number, BigInt, String, Symbol, Object, and Function into the unified napi_value type. This type handles data exchange between ArkUI applications and native code. This implementation demonstrates a synchronous Add( ...

Module Registration First, we need to register the native module. This is done in the queue_work.cpp file: // queue_work.cpp EXTERN_C_START static napi_value Init(napi_env env, napi_value exports) { napi_property_descriptor desc[] = { { "queueWork", nullptr, QueueWork, nullptr, nullptr, nullptr, napi_default, nullptr } ...

Module Loading Overview The Node-API napi_load_module intreface enables module loading in the main thread. After loading, developers can retrieve exported properties using napi_get_property or access functions via napi_get_named_property. Supported scenarios include: Loading system modules (e.g., @ohos.hilog) Loading modules from ArkTS files ...

Sample Project Source Code Analysis The sample project uses a Native C++ template with the Stage model. This analysis focuses on key implementation files for class object export and lifecycle management. Class Definition and Method Implementation NapiTest.h Header File #ifndef __NAPI_TEST_H__ #define __NAPI_TEST_H__ #include "napi/native_ ...

1. Exporting NAPI Class Objects OpenHarmony NAPI provides a way to "wrap" C++ classes and instances sothat JS applications can call constructors, methods, and access properties of those classes. Node.js Node-API also supports exporting class objects. 1.1. Flow of Exporting Class Objects via NAPI Define a JS class using napi_define_cl ...