OpcUaCanOpen
CANopen OPC-UA server
dlcanbus.cpp
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1 // This is the main DLL file.
2 #ifdef WIN32
3 #include "Stdafx.h"
4 #endif
5 
6 #include "dlcanbus.h"
7 
8 /*
9  * dlcanbus.cpp
10  *
11  * Created on: Apr 4, 2011
12  * Author: vfilimon
13  */
14 
15 #ifndef WIN32
16 #include "dlfcn.h"
17 #endif
18 
19 dlcanbus::dlcanbus() {
20 
21  p_libComponent = NULL;
22  maker_CanAccessObj = NULL;
23 // if (!openInterface(name) )
24 // p_canObj = NULL;
25 }
26 
27 dlcanbus::~dlcanbus() {
28 
29 // if (p_canObj)
30 // delete p_canObj;
31 #ifdef WIN32
32  FreeLibrary(p_libComponent);
33 #else
34  dlclose(p_libComponent);
35 #endif
36 }
37 
38 bool dlcanbus::openInterface(char *ncomponent)
39 {
40  char name[BUF_SIZE];
41 #ifndef WIN32
42  char *err;
43 #endif
44  wchar_t wname[2*BUF_SIZE];
45  // const char * err;
46  componentName = ncomponent;
47 #ifdef WIN32
48  sprintf(name,"%scan.dll",ncomponent);
49  size_t len = strlen(name)+1;
50  // wchar_t *wname = new wchar_t[len];
51  memset(wname,0,2*len);
52  ::MultiByteToWideChar( CP_ACP, NULL,name, -1, wname,(int)len );
53 
54  p_libComponent = LoadLibrary(wname);
55  // delete []wname;
56 #else
57  sprintf(name,"lib%scan.so",ncomponent);
58  p_libComponent = dlopen(name, RTLD_NOW);
59 #endif
60  if (p_libComponent == 0) {
61 #ifdef WIN32
62  long err = GetLastError();
63  cout << "Cannot create component " << name << " " << err << endl;
64  return false;
65 #endif
66 #ifndef WIN32
67  err = dlerror();
68  if (err) {
69  cout << "dlopen " << err << endl;
70  return false;
71  }
72 #endif
73  }
74 #ifndef WIN32
75  maker_CanAccessObj = (create_canObj *)dlsym(p_libComponent,"getCanbusAccess");
76  err = dlerror();
77  if (err) {
78  cout << "dlsym " << err << endl;
79  return false;
80  }
81 #else
82  maker_CanAccessObj = (create_canObj *)GetProcAddress(p_libComponent,"getCanbusAccess");
83 #endif
84  if (!maker_CanAccessObj)
85  {
86 #ifdef WIN32
87  long err = GetLastError();
88  cout << "Cannot create component " << name << " " << err << endl;
89  FreeLibrary(p_libComponent);
90 #else
91  dlclose(p_libComponent);
92 #endif
93  cout << "Process load FAILED!" << endl;
94  return false;
95  }
96  // p_canObj = maker_CanAccessObj();
97 
98  return true;
99 }