Issues with Statically linked libraries with CAPL Dll,

Question

Can someone suggest the use of Callbacks which does not block the CANoe measurement?

So, I have issues when I try to statically link libraries and make CAPL DLL. I contacted VECTOR but there is no support available.

I tried to include the CAPL Dll in the following ways:

• CAPL Network Node ‘#pragma library("file path")’
• “File>>Options>>Programing>>CAPL DLL>> Simulation Setup / Test Setup”
• “File>>Options>>Programing>>CAPL DLL>> Measurement Setup”
• CAPL Test Module using ‘#pragma library("file path")’

I have built the DLL for 32bit using a Windows 10 64-bit machine, I tried with VS2017 and VS2019.

Using CPP REST static library

I have properly install Casablanca SDK for use in visual studio 2017 as defined here: https://stackoverflow.com/a/44910349/1919873

I have then created a CAPL DLL with Statically linking cpprest140_2_5.lib, there are no compilation errors and the DLL can be used in CAPL. Now when I call functions with GET request in the DLL inside CAPL everything works without any issues. But when I call the function with POST Request mentioned below, as soon I add the JSON data in request, I get this Runtime Kernel error and the error System Distributed simulation environment: The connection is broken! then the simulation is broken and crashed. I am only having a problem when adding Json in the request, if I remove JSONfrom the request, then everything works fine and I get the response 400 Bad requests from the server.

web::json::value rest_method_post(uint32 handle,http_client client, web::json::value json_v)
{
    CaplInstanceData* inst = GetCaplInstanceData(handle);
    inst->DllInfo("DLL: rest_method_post:");
    web::json::value json;
    try
    {
        client
            .request(web::http::methods::POST, U("/"), json_v) // Here adding JSON results in Runtime error
            .then([&](const web::http::http_response& response) {
            inst->DllInfo(const_cast<char*>(utility::conversions::to_utf8string(response.to_string().c_str()).c_str()));
            json = response.extract_json().get();
        }).wait();
    }
    catch (exception& e)
    {
        inst->DllInfo("DLL: post Exception occured!");
        inst->DllInfo((char*)e.what());
    }
    return json;
}

I have created a console application and the same function works fine.

Using lib curl

I tried to link to another library to get the job done! Unfortunately, the same error exists here also!

I have properly install lib curl 7.67.0 for use in visual studio 2017 as defined here: https://stackoverflow.com/a/54680718/1919873

I have then created a CAPL DLL with Statically linking CURL library, there are no compilation errors and the DLL can be used in CAPL. Now when I call other functions in the DLL inside CAPL everything works, I have no issues. But when I call the function mentioned below to use the CURL library, as soon as it reaches curl_global_init() or curl_easy_init(); I get this Runtime Kernel error and the error System Distributed simulation environment: The connection is broken! then the simulation is broken and crashed.

unsigned int CAPLEXPORT far CAPLPASCAL Rest_UsersLogin_new(uint32 handle)
{
    CaplInstanceData* inst = GetCaplInstanceData(handle);
    if (inst == NULL)
    {
        return -1;
    }

    try
    {
        inst->DllInfo("Request POST"); // 

        CURL* curl;
        CURLcode res;

        struct curl_slist* slist1;
        std::string data = "{\"userName\": \"xAS344yn\",\"userPassword\" : \"TjRFWFJQKRUAxyZGQxMjMj\"}";
        curl_global_init(CURL_GLOBAL_DEFAULT); // this step results in Runtime error

        curl = curl_easy_init(); // this step results in Runtime error
        std::string s;
        if (curl)
        {
            slist1 = NULL;
            slist1 = curl_slist_append(slist1, "Content-Type: application/json");

            curl_easy_setopt(curl, CURLOPT_URL, "https://localhost:61000/users/login");

            curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L); //only for https
            curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); //only for https
            curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data.c_str());
            curl_easy_setopt(curl, CURLOPT_USERAGENT, "curl/7.38.0");
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlWrite_CallbackFunc_StdString);
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
            curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist1);
            curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 50L);
            curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
            curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L);
            //curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); //remove this to disable verbose output


            /* Perform the request, res will get the return code */
            res = curl_easy_perform(curl);

            /* Check for errors */
            if (res != CURLE_OK)
            {
                inst->DllInfo((char*)curl_easy_strerror(res));
            }

            /* cleanup */
            curl_easy_cleanup(curl);
        }
        inst->DllInfo(const_cast<char*>(s.c_str()));
        //inst->DllInfo(const_cast<char*>(utility::conversions::to_utf8string(response.to_string().c_str()).c_str()));
    }
    catch (const std::exception & e)
    {
        inst->DllInfo("DLL: post Exception occured!");
        inst->DllInfo((char*)e.what());
    }
    return 1;
}

I have created a console application and the same function works fine

Answer 1

Please check your functions , I have made a mistake like calling the same function inside that function.

Example :

Void initialization
{
    initialization();
}