dlcanbus.cpp

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// This is the main DLL file.

#include "dlcanbus.h"
#include "UaCanTrace.h"

/*
 * dlcanbus.cpp
 *
 *  Created on: Apr 4, 2011
 *      Author: vfilimon
 */

#ifndef WIN32
#include "dlfcn.h"
//#include <windows.h> //I've ommited this line.
#endif

dlcanbus::dlcanbus() {

        p_libComponent = NULL;
        maker_CanAccessObj = NULL;
//      if (!openInterface(name) )
//              p_canObj = NULL;
}

dlcanbus::~dlcanbus() {

//      if (p_canObj)
//              delete p_canObj;
#ifdef WIN32
        FreeLibrary(p_libComponent);
#else
        dlclose(p_libComponent);
#endif
}

bool dlcanbus::openInterface(char *ncomponent)
{
        char name[BUF_SIZE];

        componentName = ncomponent;
#ifdef WIN32
        wchar_t wname[2*BUF_SIZE];
        sprintf_s(name,BUF_SIZE,"%scan.dll",ncomponent);
        size_t len = strlen(name)+1;
        //      wchar_t *wname = new wchar_t[len];
        memset(wname,0,2*len);
        ::MultiByteToWideChar(  CP_ACP, NULL,name, -1, wname,(int)len );

        p_libComponent = LoadLibrary(wname);
        //      delete []wname;

        if (p_libComponent == 0) {
                long err = GetLastError();
                LOG(Log::INF, CanOpen::UaCanTrace::NoTrace) << "Cannot create component " << name << " " << err;
                cout << "Cannot create component " << name << " " << err << endl;
                return false;
        }
        maker_CanAccessObj = (create_canObj *)GetProcAddress(p_libComponent,"getCanbusAccess");
        if (!maker_CanAccessObj)
        {
                long err = GetLastError();
                LOG(Log::INF, CanOpen::UaCanTrace::NoTrace) << "Cannot create component " << name << " " << err;
                FreeLibrary(p_libComponent);
        }
#endif
#ifndef WIN32
        const char * err;
    sprintf(name,"lib%scan.so",ncomponent);
    p_libComponent = dlopen(name, RTLD_NOW);
                
        if (p_libComponent == 0) {
                char *err = dlerror();
                if (err) {
                        LOG(Log::INF, CanOpen::UaCanTrace::NoTrace) << "dlopen " <<  err ;

                        cout << "dlopen error" <<  err << endl;
                        return false;
                }
        }

        maker_CanAccessObj = (create_canObj *)dlsym(p_libComponent,"getCanbusAccess");

        err = dlerror();
        if (err) {
                LOG(Log::INF, CanOpen::UaCanTrace::NoTrace) << "dlopen " <<  err ;
                cout << "dlsym " << err << endl;
                return false;
        }
        if (!maker_CanAccessObj)
        {
                dlclose(p_libComponent);
                LOG(Log::INF, CanOpen::UaCanTrace::NoTrace) << "Process load FAILED!";
                cout << "Process load FAILED!" << endl;
                return false;
        }
        
#endif
        return true;
}