1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: Dynamic library management
4 // Author: Guilhem Lavaux
8 // Copyright: (c) Guilhem Lavaux
9 // Licence: wxWindows license
10 /////////////////////////////////////////////////////////////////////////////
12 // ============================================================================
14 // ============================================================================
16 // ----------------------------------------------------------------------------
18 // ----------------------------------------------------------------------------
21 #pragma implementation "dynlib.h"
24 #include "wx/wxprec.h"
30 #if wxUSE_DYNLIB_CLASS
32 #include "wx/dynlib.h"
33 #include "wx/filefn.h"
36 #include "wx/tokenzr.h"
38 // ----------------------------------------------------------------------------
39 // conditional compilation
40 // ----------------------------------------------------------------------------
42 #if defined(HAVE_DLOPEN)
43 #define wxDllOpen(lib) dlopen(lib.fn_str(), RTLD_LAZY)
44 #define wxDllGetSymbol(handle, name) dlsym(handle, name.mb_str())
45 #define wxDllClose dlclose
46 #elif defined(HAVE_SHL_LOAD)
47 #define wxDllOpen(lib) shl_load(lib.fn_str(), BIND_DEFERRED, 0)
48 #define wxDllClose shl_unload
50 static inline void *wxDllGetSymbol(shl_t handle, const wxString& name)
53 if ( shl_findsym(&handle, name.mb_str(), TYPE_UNDEFINED, &sym) == 0 )
58 #elif defined(__WINDOWS__)
61 // using LoadLibraryEx under Win32 to avoid name clash with LoadLibrary
63 #define wxDllOpen(lib) ::LoadLibraryEx(lib, 0, 0)
65 #define wxDllOpen(lib) ::LoadLibrary(lib)
67 #define wxDllGetSymbol(handle, name) ::GetProcAddress(handle, name)
68 #define wxDllClose ::FreeLibrary
70 #error "Don't know how to load shared libraries on this platform."
73 // ---------------------------------------------------------------------------
75 // ---------------------------------------------------------------------------
77 wxLibraries wxTheLibraries;
79 // ----------------------------------------------------------------------------
81 // ----------------------------------------------------------------------------
83 // construct the full name from the base shared object name: adds a .dll
84 // suffix under Windows or .so under Unix
85 static wxString ConstructLibraryName(const wxString& basename)
87 wxString fullname(basename);
95 #elif defined(__WINDOWS__)
102 // ============================================================================
104 // ============================================================================
106 // ---------------------------------------------------------------------------
107 // wxLibrary (one instance per dynamic library)
108 // ---------------------------------------------------------------------------
110 wxLibrary::wxLibrary(wxDllType handle)
112 typedef wxClassInfo *(*t_get_first)(void);
113 t_get_first get_first;
117 // Some system may use a local heap for library.
118 get_first = (t_get_first)GetSymbol("wxGetClassFirst");
119 // It is a wxWindows DLL.
121 PrepareClasses(get_first());
124 wxLibrary::~wxLibrary()
128 wxDllClose(m_handle);
132 wxObject *wxLibrary::CreateObject(const wxString& name)
134 wxClassInfo *info = (wxClassInfo *)classTable.Get(name);
139 return info->CreateObject();
142 void wxLibrary::PrepareClasses(wxClassInfo *first)
144 // Index all class infos by their class name
145 wxClassInfo *info = first;
148 if (info->m_className)
149 classTable.Put(info->m_className, (wxObject *)info);
150 info = info->GetNext();
153 // Set base pointers for each wxClassInfo
157 if (info->GetBaseClassName1())
158 info->m_baseInfo1 = (wxClassInfo *)classTable.Get(info->GetBaseClassName1());
159 if (info->GetBaseClassName2())
160 info->m_baseInfo2 = (wxClassInfo *)classTable.Get(info->GetBaseClassName2());
165 void *wxLibrary::GetSymbol(const wxString& symbname)
167 void *symbol = NULL; // return value
169 #if defined( __WXMAC__ )
171 CFragSymbolClass symClass ;
174 strcpy( (char*) symName , symbname ) ;
175 c2pstr( (char*) symName ) ;
177 if ( FindSymbol( m_handle , symName , &symAddress , &symClass ) == noErr )
179 symbol = (void *)symAddress ;
182 symbol = wxDllGetSymbol(m_handle, symbname);
187 wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
194 // ---------------------------------------------------------------------------
195 // wxLibraries (only one instance should normally exist)
196 // ---------------------------------------------------------------------------
198 wxLibraries::wxLibraries()
202 wxLibraries::~wxLibraries()
204 wxNode *node = m_loaded.First();
207 wxLibrary *lib = (wxLibrary *)node->Data();
214 wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
218 wxClassInfo *old_sm_first;
220 if ( (node = m_loaded.Find(name.GetData())) )
221 return ((wxLibrary *)node->Data());
223 // If DLL shares data, this is necessary.
224 old_sm_first = wxClassInfo::sm_first;
225 wxClassInfo::sm_first = NULL;
227 wxString lib_name = ConstructLibraryName(name);
229 #if defined(__UNIX__)
230 // found the first file in LD_LIBRARY_PATH with this name
231 wxString libPath("/lib:/usr/lib"); // system path first
232 const char *envLibPath = getenv("LD_LIBRARY_PATH");
234 libPath << ':' << envLibPath;
235 wxStringTokenizer tokenizer(libPath, _T(':'));
236 while ( tokenizer.HasMoreToken() )
238 wxString fullname(tokenizer.NextToken());
240 fullname << '/' << lib_name;
241 if ( wxFileExists(fullname) )
249 //else: not found in the path, leave the name as is (secutiry risk?)
255 #if defined(__WXMAC__)
260 wxMacPathToFSSpec( lib_name , &myFSSpec ) ;
261 if (GetDiskFragment( &myFSSpec , 0 , kCFragGoesToEOF , "\p" , kPrivateCFragCopy , &handle , &myMainAddr ,
262 myErrName ) != noErr )
264 p2cstr( myErrName ) ;
265 wxASSERT_MSG( 1 , (char*)myErrName ) ;
269 handle = wxDllOpen(lib_name);
274 wxLogSysError(_("Failed to load shared library '%s'"),
280 lib = new wxLibrary(handle);
282 wxClassInfo::sm_first = old_sm_first;
284 m_loaded.Append(name.GetData(), lib);
289 wxObject *wxLibraries::CreateObject(const wxString& path)
291 wxNode *node = m_loaded.First();
295 obj = ((wxLibrary *)node->Data())->CreateObject(path);
304 #endif // wxUSE_DYNLIB_CLASS