/////////////////////////////////////////////////////////////////////////////
-// Name: dynload.cpp
+// Name: src/common/dynload.cpp
// Purpose: Dynamic loading framework
// Author: Ron Lee, David Falkinder, Vadim Zeitlin and a cast of 1000's
// (derived in part from dynlib.cpp (c) 1998 Guilhem Lavaux)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "dynload.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "wx/intl.h"
#include "wx/hash.h"
#include "wx/utils.h"
+ #include "wx/module.h"
#endif
#include "wx/strconv.h"
#include "wx/dynload.h"
-#include "wx/module.h"
// ---------------------------------------------------------------------------
{
wxPluginLibrary::ms_classes = new wxDLImports;
wxPluginManager::CreateManifest();
- return TRUE;
+ return true;
}
virtual void OnExit()
{
- delete wxPluginLibrary::ms_classes;
- wxPluginLibrary::ms_classes = NULL;
+ wxDELETE(wxPluginLibrary::ms_classes);
wxPluginManager::ClearManifest();
}
: m_linkcount(1)
, m_objcount(0)
{
- m_before = wxClassInfo::sm_first;
+ const wxClassInfo* const oldFirst = wxClassInfo::GetFirst();
Load( libname, flags );
- m_after = wxClassInfo::sm_first;
+
+ // It is simple to know what is the first object in the linked list of
+ // wxClassInfo that we registered (it's also the last one chronologically),
+ // it's just the new head of the wxClassInfo list:
+ m_ourFirst = wxClassInfo::GetFirst();
+
+ // But to find the first wxClassInfo created by this library we need to
+ // iterate until we get to the previous head as we don't have the links in
+ // the backwards direction:
+ if ( m_ourFirst != oldFirst )
+ {
+ for ( const wxClassInfo* info = m_ourFirst; ; info = info->GetNext() )
+ {
+ if ( info->GetNext() == oldFirst )
+ {
+ m_ourLast = info;
+ break;
+ }
+ }
+ }
+ else // We didn't register any classes at all.
+ {
+ m_ourFirst =
+ m_ourLast = NULL;
+ }
if( m_handle != 0 )
{
- UpdateClassInfo();
+ UpdateClasses();
RegisterModules();
}
else
if( m_handle != 0 )
{
UnregisterModules();
- RestoreClassInfo();
+ RestoreClasses();
}
}
wxPluginLibrary *wxPluginLibrary::RefLib()
{
wxCHECK_MSG( m_linkcount > 0, NULL,
- _T("Library had been already deleted!") );
+ wxT("Library had been already deleted!") );
++m_linkcount;
return this;
bool wxPluginLibrary::UnrefLib()
{
wxASSERT_MSG( m_objcount == 0,
- _T("Library unloaded before all objects were destroyed") );
+ wxT("Library unloaded before all objects were destroyed") );
- if ( --m_linkcount == 0 )
+ if ( m_linkcount == 0 || --m_linkcount == 0 )
{
delete this;
- return TRUE;
+ return true;
}
- return FALSE;
+ return false;
}
// ------------------------
// Private methods
// ------------------------
-void wxPluginLibrary::UpdateClassInfo()
+void wxPluginLibrary::UpdateClasses()
{
- wxClassInfo *info;
- wxHashTable *t = wxClassInfo::sm_classTable;
-
- // FIXME: Below is simply a cut and paste specialisation of
- // wxClassInfo::InitializeClasses. Once this stabilises,
- // the two should probably be merged.
- //
- // Actually it's becoming questionable whether we should merge
- // this info with the main ClassInfo tables since we can nearly
- // handle this completely internally now and it does expose
- // certain (minimal % user_stupidy) risks.
-
- for(info = m_after; info != m_before; info = info->m_next)
+ if ( !m_ourFirst )
+ return;
+
+ for ( const wxClassInfo *info = m_ourFirst; ; info = info->GetNext() )
{
- if( info->m_className )
+ if( info->GetClassName() )
{
- if( t->Get(info->m_className) == 0 )
- t->Put(info->m_className, (wxObject *)info);
-
// Hash all the class names into a local table too so
// we can quickly find the entry they correspond to.
- (*ms_classes)[info->m_className] = this;
+ (*ms_classes)[info->GetClassName()] = this;
}
+
+ if ( info == m_ourLast )
+ break;
}
}
-void wxPluginLibrary::RestoreClassInfo()
+void wxPluginLibrary::RestoreClasses()
{
- wxClassInfo *info;
+ // Check if there is a need to restore classes.
+ if (!ms_classes)
+ return;
- for(info = m_after; info != m_before; info = info->m_next)
- {
- wxClassInfo::sm_classTable->Delete(info->m_className);
- ms_classes->erase(ms_classes->find(info->m_className));
- }
+ if ( !m_ourFirst )
+ return;
- if( wxClassInfo::sm_first == m_after )
- wxClassInfo::sm_first = m_before;
- else
+ for ( const wxClassInfo *info = m_ourFirst; ; info = info->GetNext() )
{
- info = wxClassInfo::sm_first;
- while( info->m_next && info->m_next != m_after ) info = info->m_next;
-
- wxASSERT_MSG( info, _T("ClassInfo from wxPluginLibrary not found on purge"));
+ ms_classes->erase(ms_classes->find(info->GetClassName()));
- info->m_next = m_before;
+ if ( info == m_ourLast )
+ break;
}
}
// though, as there is currently no way to Unregister it without it.
wxASSERT_MSG( m_linkcount == 1,
- _T("RegisterModules should only be called for the first load") );
+ wxT("RegisterModules should only be called for the first load") );
- for ( wxClassInfo *info = m_after; info != m_before; info = info->m_next)
+ if ( m_ourFirst )
{
- if( info->IsKindOf(CLASSINFO(wxModule)) )
+ for ( const wxClassInfo *info = m_ourFirst; ; info = info->GetNext() )
{
- wxModule *m = wxDynamicCast(info->CreateObject(), wxModule);
+ if( info->IsKindOf(wxCLASSINFO(wxModule)) )
+ {
+ wxModule *m = wxDynamicCast(info->CreateObject(), wxModule);
- wxASSERT_MSG( m, _T("wxDynamicCast of wxModule failed") );
+ wxASSERT_MSG( m, wxT("wxDynamicCast of wxModule failed") );
- m_wxmodules.push_back(m);
- wxModule::RegisterModule(m);
+ m_wxmodules.push_back(m);
+ wxModule::RegisterModule(m);
+ }
+
+ if ( info == m_ourLast )
+ break;
}
}
{
if( !(*it)->Init() )
{
- wxLogDebug(_T("wxModule::Init() failed for wxPluginLibrary"));
+ wxLogDebug(wxT("wxModule::Init() failed for wxPluginLibrary"));
// XXX: Watch this, a different hash implementation might break it,
// a good hash implementation would let us fix it though.
for ( it = m_wxmodules.begin(); it != m_wxmodules.end(); ++it )
wxModule::UnregisterModule( *it );
- WX_CLEAR_LIST(wxModuleList, m_wxmodules);
+ // NB: content of the list was deleted by UnregisterModule calls above:
+ m_wxmodules.clear();
}
if ( entry )
{
- wxLogTrace(_T("dll"),
- _T("LoadLibrary(%s): already loaded."), realname.c_str());
+ wxLogTrace(wxT("dll"),
+ wxT("LoadLibrary(%s): already loaded."), realname.c_str());
entry->RefLib();
}
{
(*ms_manifest)[realname] = entry;
- wxLogTrace(_T("dll"),
- _T("LoadLibrary(%s): loaded ok."), realname.c_str());
+ wxLogTrace(wxT("dll"),
+ wxT("LoadLibrary(%s): loaded ok."), realname.c_str());
}
else
{
- wxLogTrace(_T("dll"),
- _T("LoadLibrary(%s): failed to load."), realname.c_str());
+ wxLogTrace(wxT("dll"),
+ wxT("LoadLibrary(%s): failed to load."), realname.c_str());
// we have created entry just above
if ( !entry->UnrefLib() )
{
// ... so UnrefLib() is supposed to delete it
- wxFAIL_MSG( _T("Currently linked library is not loaded?") );
+ wxFAIL_MSG( wxT("Currently linked library is not loaded?") );
}
entry = NULL;
if ( !entry )
{
- wxLogDebug(_T("Attempt to unload library '%s' which is not loaded."),
+ wxLogDebug(wxT("Attempt to unload library '%s' which is not loaded."),
libname.c_str());
- return FALSE;
+ return false;
}
- wxLogTrace(_T("dll"), _T("UnloadLibrary(%s)"), realname.c_str());
+ wxLogTrace(wxT("dll"), wxT("UnloadLibrary(%s)"), realname.c_str());
if ( !entry->UnrefLib() )
{
// not really unloaded yet
- return FALSE;
+ return false;
}
ms_manifest->erase(ms_manifest->find(realname));
- return TRUE;
+ return true;
}
// ------------------------
void wxPluginManager::Unload()
{
- wxCHECK_RET( m_entry, _T("unloading an invalid wxPluginManager?") );
+ wxCHECK_RET( m_entry, wxT("unloading an invalid wxPluginManager?") );
for ( wxDLManifest::iterator i = ms_manifest->begin();
i != ms_manifest->end();
m_entry = NULL;
}
-
-
-#if WXWIN_COMPATIBILITY_2_2
-
-wxPluginLibrary *wxPluginManager::GetObjectFromHandle(wxDllType handle)
-{
- for ( wxDLManifest::iterator i = ms_manifest->begin();
- i != ms_manifest->end();
- ++i )
- {
- wxPluginLibrary * const lib = i->second;
-
- if ( lib->GetLibHandle() == handle )
- return lib;
- }
-
- return NULL;
-}
-
-// ---------------------------------------------------------------------------
-// wxDllLoader (all these methods are static)
-// ---------------------------------------------------------------------------
-
-
-wxDllType wxDllLoader::LoadLibrary(const wxString &name, bool *success)
-{
- wxPluginLibrary *p = wxPluginManager::LoadLibrary
- (
- name,
- wxDL_DEFAULT | wxDL_VERBATIM | wxDL_NOSHARE
- );
-
- if ( success )
- *success = p != NULL;
-
- return p ? p->GetLibHandle() : 0;
-}
-
-void wxDllLoader::UnloadLibrary(wxDllType handle)
-{
- wxPluginLibrary *p = wxPluginManager::GetObjectFromHandle(handle);
-
- wxCHECK_RET( p, _T("Unloading a library not loaded with wxDllLoader?") );
-
- p->UnrefLib();
-}
-
-void *
-wxDllLoader::GetSymbol(wxDllType dllHandle, const wxString &name, bool *success)
-{
- wxPluginLibrary *p = wxPluginManager::GetObjectFromHandle(dllHandle);
-
- if ( !p )
- {
- wxFAIL_MSG( _T("Using a library not loaded with wxDllLoader?") );
-
- if ( success )
- *success = FALSE;
-
- return NULL;
- }
-
- return p->GetSymbol(name, success);
-}
-
-
-// ---------------------------------------------------------------------------
-// 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::wxLibrary(wxDllType handle)
-{
- typedef wxClassInfo *(*t_get_first)(void);
- t_get_first get_first;
-
- m_handle = handle;
-
- // Some system may use a local heap for library.
- get_first = (t_get_first)GetSymbol(_T("wxGetClassFirst"));
- // It is a wxWindows DLL.
- if (get_first)
- PrepareClasses(get_first());
-}
-
-wxLibrary::~wxLibrary()
-{
- if ( m_handle )
- {
- wxDllLoader::UnloadLibrary(m_handle);
- }
-}
-
-wxObject *wxLibrary::CreateObject(const wxString& name)
-{
- wxClassInfo *info = (wxClassInfo *)classTable.Get(name);
-
- if (!info)
- return NULL;
-
- return info->CreateObject();
-}
-
-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;
- }
-
-#if !wxUSE_EXTENDED_RTTI
- // 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;
- }
-#endif
-}
-
-void *wxLibrary::GetSymbol(const wxString& symbname)
-{
- return wxDllLoader::GetSymbol(m_handle, symbname);
-}
-
-
-// ---------------------------------------------------------------------------
-// wxLibraries (only one instance should normally exist)
-// ---------------------------------------------------------------------------
-
-wxLibraries::wxLibraries():m_loaded(wxKEY_STRING)
-{
-}
-
-wxLibraries::~wxLibraries()
-{
- wxNode *node = m_loaded.First();
-
- while (node) {
- wxLibrary *lib = (wxLibrary *)node->Data();
- delete lib;
-
- node = node->Next();
- }
-}
-
-wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
-{
- wxLibrary *lib;
- wxClassInfo *old_sm_first;
- wxNode *node = m_loaded.Find(name.GetData());
-
- if (node != NULL)
- return ((wxLibrary *)node->Data());
-
- // If DLL shares data, this is necessary.
- old_sm_first = wxClassInfo::sm_first;
- wxClassInfo::sm_first = NULL;
-
- wxString libname = ConstructLibraryName(name);
-
- 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;
-
- while (node) {
- obj = ((wxLibrary *)node->Data())->CreateObject(path);
- if (obj)
- return obj;
-
- node = node->Next();
- }
- return NULL;
-}
-
-#endif // WXWIN_COMPATIBILITY_2_2
-
-
#endif // wxUSE_DYNAMIC_LOADER
-
projects / wxWidgets.git / blobdiff