如何在Native层加载so库

<CMakeLists.txt> 
 
# the minimum version of CMake. 
cmake_minimum_required(VERSION 3.4.1) 
project(OpenCl) 
include_directories(${CMAKE_SOURCE_DIR}/include) 
link_directories(${CMAKE_SOURCE_DIR}/libs) 
add_library(entry SHARED hello.cpp) 
target_link_libraries(entry libace_napi.z.so libhilog_ndk.z.so) 
<hello.cpp> 
 
#include "napi/native_api.h" 
#include <stdio.h> 
#include <stdlib.h> 
#include <dlfcn.h> 
#define LOG_TAG "name1111111111" 
#include <hilog/log.h> 
 
  //add接口，里面写对应的业务逻辑 
  static napi_value Add(napi_env env, napi_callback_info info) 
{ 
  size_t requireArgc = 2; 
  size_t argc = 2; 
  napi_value args[2] = {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_value sum; 
  napi_create_double(env, value0 + value1, &sum); 
 
  int a, b; 
  void *p; 
  int (*func)(int, int); 
  scanf("%d%d", &a, &b); 
  // dlopen两个参数，第一个是想要打开的so库路径，第二个参数是加载模式 
  p = dlopen("/vendor/lib64/libnpu_slog.so", RTLD_NOW | RTLD_LOCAL); 
  if (p == NULL) { 
    OH_LOG_INFO(LOG_APP, "dlopenNull: dlopen error!"); 
    exit(0); 
  } else 
    OH_LOG_INFO(LOG_APP, "dlopenSuccess: dlopen ok!"); 
  dlclose(p); 
  return sum; 
} 
 
//导出add接口 
EXTERN_C_START 
static napi_value Init(napi_env env, napi_value exports) 
{ 
  napi_property_descriptor desc[] = { 
  { "add", nullptr, Add, 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); 
}