// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation "dynlib.h"
+# pragma implementation "dynlib.h"
#endif
#include "wx/wxprec.h"
-#ifdef __BORLANDC__
+#ifdef __BORLANDC__
#pragma hdrstop
-#endif //__BORLANDC__
-
-#ifndef WX_PRECOMP
-#endif //WX_PRECOMP
-
-#include <wx/dynlib.h>
-#include <wx/filefn.h>
-#include <wx/list.h>
-#include <wx/string.h>
-
-// ---------------------------------------------------------------------------
-// System dependent include
-// ---------------------------------------------------------------------------
-
-#ifdef __UNIX__
-#include <dlfcn.h>
#endif
-#ifdef __WINDOWS__
-#include <windows.h>
+#if wxUSE_DYNLIB_CLASS
+
+#if defined(__WINDOWS__)
+ #include "wx/msw/private.h"
#endif
-#ifdef LoadLibrary
-#undef LoadLibrary
+#include "wx/dynlib.h"
+#include "wx/filefn.h"
+#include "wx/intl.h"
+#include "wx/log.h"
+#include "wx/tokenzr.h"
+
+// ----------------------------------------------------------------------------
+// conditional compilation
+// ----------------------------------------------------------------------------
+
+#if defined(__WXPM__) || defined(__EMX__)
+# define INCL_DOS
+# include <os2.h>
+# define wxDllOpen(error, lib, handle) DosLoadModule(error, sizeof(error), lib, &handle)
+# define wxDllGetSymbol(handle, modaddr) DosQueryProcAddr(handle, 1L, NULL, (PFN*)modaddr)
+# define wxDllClose(handle) DosFreeModule(handle)
+#elif defined(HAVE_DLOPEN)
+# define wxDllOpen(lib) dlopen(lib.fn_str(), RTLD_NOW/*RTLD_LAZY*/)
+# define wxDllGetSymbol(handle, name) dlsym(handle, name)
+# define wxDllClose dlclose
+#elif defined(HAVE_SHL_LOAD)
+# define wxDllOpen(lib) shl_load(lib.fn_str(), BIND_DEFERRED, 0)
+# define wxDllClose shl_unload
+
+ static inline void *wxDllGetSymbol(shl_t handle, const wxString& name)
+ {
+ void *sym;
+ if ( shl_findsym(&handle, name.mb_str(), TYPE_UNDEFINED, &sym) == 0 )
+ return sym;
+ else
+ return (void *)0;
+ }
+#elif defined(__WINDOWS__)
+ // using LoadLibraryEx under Win32 to avoid name clash with LoadLibrary
+# ifdef __WIN32__
+#ifdef _UNICODE
+# define wxDllOpen(lib) ::LoadLibraryExW(lib, 0, 0)
+#else
+# define wxDllOpen(lib) ::LoadLibraryExA(lib, 0, 0)
#endif
+# else // Win16
+# define wxDllOpen(lib) ::LoadLibrary(lib)
+# endif // Win32/16
+# define wxDllGetSymbol(handle, name) ::GetProcAddress(handle, name)
+# define wxDllClose ::FreeLibrary
+#else
+# error "Don't know how to load shared libraries on this platform."
+#endif // OS
// ---------------------------------------------------------------------------
// Global variables
wxLibraries wxTheLibraries;
+// ============================================================================
+// implementation
+// ============================================================================
+
+// construct the full name from the base shared object name: adds a .dll
+// suffix under Windows or .so under Unix
+static wxString ConstructLibraryName(const wxString& basename)
+{
+ wxString fullname;
+ fullname << basename << wxDllLoader::GetDllExt();
+
+ return fullname;
+}
+
// ---------------------------------------------------------------------------
-// wxLibrary (one instance per dynamic library
+// wxLibrary (one instance per dynamic library)
// ---------------------------------------------------------------------------
-wxLibrary::wxLibrary(void *handle)
+wxLibrary::wxLibrary(wxDllType handle)
{
- typedef wxClassInfo **(*t_get_first)(void);
- t_get_first get_first;
+ typedef wxClassInfo *(*t_get_first)(void);
+ t_get_first get_first;
- m_handle = handle;
- m_destroy = TRUE;
+ m_handle = handle;
- // Some system may use a local heap for library.
- get_first = (t_get_first)GetSymbol("wxGetClassFirst");
- // It is a wxWindows DLL.
- if (get_first)
- PrepareClasses(get_first());
+ // Some system may use a local heap for library.
+ get_first = (t_get_first)GetSymbol("wxGetClassFirst");
+ // It is a wxWindows DLL.
+ if (get_first)
+ PrepareClasses(get_first());
}
wxLibrary::~wxLibrary()
{
- if (m_handle && m_destroy) {
-#ifdef __UNIX__
- dlclose(m_handle);
-#endif
-#ifdef __WINDOWS__
- FreeLibrary((HMODULE)m_handle);
-#endif
- }
+ if ( m_handle )
+ {
+ wxDllClose(m_handle);
+ }
}
wxObject *wxLibrary::CreateObject(const wxString& name)
{
- wxClassInfo *info = (wxClassInfo *)classTable.Get(name);
+ wxClassInfo *info = (wxClassInfo *)classTable.Get(name);
- if (!info)
- return NULL;
+ if (!info)
+ return NULL;
- return info->CreateObject();
+ return info->CreateObject();
}
-void wxLibrary::PrepareClasses(wxClassInfo **first)
+void wxLibrary::PrepareClasses(wxClassInfo *first)
{
- // Index all class infos by their class name
- wxClassInfo *info = *first;
- while (info)
- {
- if (info->m_className)
- classTable.Put(info->m_className, (wxObject *)info);
- info = info->m_next;
- }
-
- // Set base pointers for each wxClassInfo
- info = *first;
- while (info)
- {
- if (info->GetBaseClassName1())
- info->m_baseInfo1 = (wxClassInfo *)classTable.Get(info->GetBaseClassName1());
- if (info->GetBaseClassName2())
- info->m_baseInfo2 = (wxClassInfo *)classTable.Get(info->GetBaseClassName2());
- info = info->m_next;
- }
- *first = NULL;
+ // Index all class infos by their class name
+ wxClassInfo *info = first;
+ while (info)
+ {
+ if (info->m_className)
+ classTable.Put(info->m_className, (wxObject *)info);
+ info = info->GetNext();
+ }
+
+ // Set base pointers for each wxClassInfo
+ info = first;
+ while (info)
+ {
+ if (info->GetBaseClassName1())
+ info->m_baseInfo1 = (wxClassInfo *)classTable.Get(info->GetBaseClassName1());
+ if (info->GetBaseClassName2())
+ info->m_baseInfo2 = (wxClassInfo *)classTable.Get(info->GetBaseClassName2());
+ info = info->m_next;
+ }
}
void *wxLibrary::GetSymbol(const wxString& symbname)
{
-#ifdef __UNIX__
- return dlsym(m_handle, WXSTRINGCAST symbname);
+ return wxDllLoader::GetSymbol(m_handle, symbname);
+}
+
+// ---------------------------------------------------------------------------
+// wxDllLoader
+// ---------------------------------------------------------------------------
+
+/* static */
+wxString wxDllLoader::GetDllExt()
+{
+ wxString ext;
+
+#if defined(__WINDOWS__) || defined(__WXPM__) || defined(__EMX__)
+ ext = _T(".dll");
+#elif defined(__UNIX__)
+# if defined(__HPUX__)
+ ext = _T(".sl");
+# else //__HPUX__
+ ext = _T(".so");
+# endif //__HPUX__
#endif
-#ifdef __WINDOWS__
- return GetProcAddress((HINSTANCE) m_handle, WXSTRINGCAST symbname);
+
+ return ext;
+}
+
+/* static */
+wxDllType
+wxDllLoader::GetProgramHandle(void)
+{
+#if defined( HAVE_DLOPEN ) && !defined(__EMX__)
+ // optain handle for main program
+ return dlopen(NULL, RTLD_NOW/*RTLD_LAZY*/);
+#elif defined (HAVE_SHL_LOAD)
+ // shl_findsymbol with NULL handle looks up in main program
+ return 0;
+#else
+ wxFAIL_MSG( wxT("This method is not implemented under Windows or OS/2"));
+ return 0;
#endif
- return NULL;
+}
+
+/* static */
+wxDllType
+wxDllLoader::LoadLibrary(const wxString & libname, bool *success)
+{
+ wxDllType handle;
+
+#if defined(__WXMAC__)
+ FSSpec myFSSpec ;
+ Ptr myMainAddr ;
+ Str255 myErrName ;
+
+ wxMacPathToFSSpec( libname , &myFSSpec ) ;
+ if (GetDiskFragment( &myFSSpec , 0 , kCFragGoesToEOF , "\p" , kPrivateCFragCopy , &handle , &myMainAddr ,
+ myErrName ) != noErr )
+ {
+ p2cstr( myErrName ) ;
+ wxASSERT_MSG( 1 , (char*)myErrName ) ;
+ return NULL ;
+ }
+#elif defined(__WXPM__) || defined(__EMX__)
+ char zError[256] = "";
+ wxDllOpen(zError, libname, handle);
+#else // !Mac
+ handle = wxDllOpen(libname);
+#endif // OS
+
+ if ( !handle )
+ {
+ wxString msg(_("Failed to load shared library '%s'"));
+
+#ifdef HAVE_DLERROR
+ const char *errmsg = dlerror();
+ if ( errmsg )
+ {
+ // the error string format is "libname: ...", but we already have
+ // libname, so cut it off
+ const char *p = strchr(errmsg, ':');
+ if ( p )
+ {
+ if ( *++p == ' ' )
+ p++;
+ }
+ else
+ {
+ p = errmsg;
+ }
+
+ msg += _T(" (%s)");
+ wxLogError(msg, libname.c_str(), p);
+ }
+ else
+#endif // HAVE_DLERROR
+ {
+ wxLogSysError(msg, libname.c_str());
+ }
+ }
+
+ if ( success )
+ {
+ *success = handle != 0;
+ }
+
+ return handle;
+}
+
+
+/* static */
+void
+wxDllLoader::UnloadLibrary(wxDllType handle)
+{
+ wxDllClose(handle);
+}
+
+/* static */
+void *
+wxDllLoader::GetSymbol(wxDllType dllHandle, const wxString &name)
+{
+ void *symbol = NULL; // return value
+
+#if defined( __WXMAC__ )
+ Ptr symAddress ;
+ CFragSymbolClass symClass ;
+ Str255 symName ;
+
+ strcpy( (char*) symName , name ) ;
+ c2pstr( (char*) symName ) ;
+
+ if ( FindSymbol( dllHandle , symName , &symAddress , &symClass ) == noErr )
+ symbol = (void *)symAddress ;
+#elif defined( __WXPM__ ) || defined(__EMX__)
+ wxDllGetSymbol(dllHandle, symbol);
+#else
+ // mb_str() is necessary in Unicode build
+ symbol = wxDllGetSymbol(dllHandle, name.mb_str());
+#endif
+
+ if ( !symbol )
+ {
+ wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
+ name.c_str());
+ }
+ return symbol;
}
// ---------------------------------------------------------------------------
// wxLibraries (only one instance should normally exist)
// ---------------------------------------------------------------------------
-wxLibraries::wxLibraries()
+wxLibraries::wxLibraries():m_loaded(wxKEY_STRING)
{
}
wxLibraries::~wxLibraries()
{
- wxNode *node = m_loaded.First();
+ wxNode *node = m_loaded.First();
- while (node) {
- wxLibrary *lib = (wxLibrary *)node->Data();
- delete lib;
+ while (node) {
+ wxLibrary *lib = (wxLibrary *)node->Data();
+ delete lib;
- node = node->Next();
- }
+ node = node->Next();
+ }
}
wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
{
- wxString lib_name = name;
- wxNode *node;
- wxLibrary *lib;
+ wxNode *node;
+ wxLibrary *lib;
+ wxClassInfo *old_sm_first;
+
+#if defined(__VISAGECPP__)
+ node = m_loaded.Find(name.GetData());
+ if (node != NULL)
+ return ((wxLibrary *)node->Data());
+#else // !OS/2
+ if ( (node = m_loaded.Find(name.GetData())) )
+ return ((wxLibrary *)node->Data());
+#endif
+ // If DLL shares data, this is necessary.
+ old_sm_first = wxClassInfo::sm_first;
+ wxClassInfo::sm_first = NULL;
- if ( (node = m_loaded.Find(name.GetData())) )
- return ((wxLibrary *)node->Data());
+ wxString libname = ConstructLibraryName(name);
+/*
+ Unix automatically builds that library name, at least for dlopen()
+*/
+#if 0
#if defined(__UNIX__)
- lib_name.Prepend("./lib");
- lib_name += ".so";
-
- printf("lib_name = %s\n", WXSTRINGCAST lib_name);
-
- void *handle = dlopen(WXSTRINGCAST lib_name, RTLD_LAZY);
-
- if (!handle)
- return NULL;
-#elif defined(__WINDOWS__)
- lib_name += ".dll";
-
-#ifdef UNICODE
- HMODULE handle = LoadLibraryW(lib_name);
-#else
- HMODULE handle = LoadLibraryA(lib_name);
-#endif
- if (!handle)
- return NULL;
-#else
- return NULL;
+ // found the first file in LD_LIBRARY_PATH with this name
+ wxString libPath("/lib:/usr/lib"); // system path first
+ const char *envLibPath = getenv("LD_LIBRARY_PATH");
+ if ( envLibPath )
+ libPath << wxT(':') << envLibPath;
+ wxStringTokenizer tokenizer(libPath, wxT(':'));
+ while ( tokenizer.HasMoreToken() )
+ {
+ wxString fullname(tokenizer.NextToken());
+
+ fullname << wxT('/') << libname;
+ if ( wxFileExists(fullname) )
+ {
+ libname = fullname;
+
+ // found the library
+ break;
+ }
+ }
+ //else: not found in the path, leave the name as is (secutiry risk?)
+
+#endif // __UNIX__
#endif
- lib = new wxLibrary((void *)handle);
-
- m_loaded.Append(name.GetData(), lib);
- return lib;
+ bool success = FALSE;
+ wxDllType handle = wxDllLoader::LoadLibrary(libname, &success);
+ if(success)
+ {
+ lib = new wxLibrary(handle);
+ wxClassInfo::sm_first = old_sm_first;
+ m_loaded.Append(name.GetData(), lib);
+ }
+ else
+ lib = NULL;
+ return lib;
}
wxObject *wxLibraries::CreateObject(const wxString& path)
{
- wxNode *node = m_loaded.First();
- wxObject *obj;
+ wxNode *node = m_loaded.First();
+ wxObject *obj;
- while (node) {
- obj = ((wxLibrary *)node->Data())->CreateObject(path);
- if (obj)
- return obj;
+ while (node) {
+ obj = ((wxLibrary *)node->Data())->CreateObject(path);
+ if (obj)
+ return obj;
- node = node->Next();
- }
- return NULL;
+ node = node->Next();
+ }
+ return NULL;
}
+
+#endif // wxUSE_DYNLIB_CLASS
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