javascript 相当于 python ctypes with node-gyp

Question

我想将 python 脚本转换为 javascript 脚本。我的 python 脚本加载一个 dll 并使用它的 API.

processings2D = ctypes.CDLL('processings2D.dll')
print(processings2D.ImageProcessor2DCreate())

我尝试用 node-gyp 做同样的事情，但我的脚本没有找到 dll。

console.log(processings2D.ImageProcessor2DCreate());
                      ^
TypeError: Cannot load processings2D.dll library

test.js

var processings2D = require('./build/Release/processings2D.node');   
console.log(processings2D.ImageProcessor2DCreate());

addon.cc

#include <nan.h>
#include "processings2D/processings2D.h"

HINSTANCE hDLL = NULL;
typedef int(*Fn)();

void ImageProcessor2DCreate(const Nan::FunctionCallbackInfo<v8::Value>& info) {
    hDLL = LoadLibrary("processings2D.dll");
    if(!hDLL)
    {
        Nan::ThrowTypeError("Cannot load processings2D.dll library");
        return;
    }

    Fn fn = (Fn)GetProcAddress(hDLL, "ImageProcessor2DCreate");
    if (!fn) {
        Nan::ThrowTypeError("Could not load ImageProcessor2DCreate function");
        FreeLibrary(hDLL);
        return;
    }

    info.GetReturnValue().Set(Nan::New(fn()));
}

void Init(v8::Local<v8::Object> exports) {
    exports->Set(Nan::New("ImageProcessor2DCreate").ToLocalChecked(), Nan::New<v8::FunctionTemplate>(ImageProcessor2DCreate)->GetFunction());
}

NODE_MODULE(twoD, Init)

binding.gyp

{
  "targets": [
    {
      "target_name": "processings2D",
      "sources": [
        "addon.cc"
      ],
      "include_dirs": [
        "<!(node -e \"require('nan')\")"
      ]
    }
  ]
}

dll 在 Release 文件夹中 /build/Release/processings2D.dll

我的方向对吗？

Answer 1

解决方案非常简单：

我的 dll 是 32 位版本，所以我应该用好的 arch 构建我的模块并用好的节点版本执行我的测试。

node-gyp clean configure --arch=ia32 build
"C:\Program Files (x86)\nodejs\node.exe" test.js

javascript 相当于 python ctypes with node-gyp

javascript equivalent for python ctypes with node-gyp

node.js

dll

node-gyp