X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fe9c9eb0227e2f2b50e470bc2e97d6432f3bcf48..39c0d6d6b6682b1847881d1e2662a4ccdec83ec8:/src/common/module.cpp diff --git a/src/common/module.cpp b/src/common/module.cpp index 8397312756..b8438d4602 100644 --- a/src/common/module.cpp +++ b/src/common/module.cpp @@ -1,99 +1,224 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: module.cpp +// Name: src/common/module.cpp // Purpose: Modules initialization/destruction // Author: Wolfram Gloger/adapted by Guilhem Lavaux // Modified by: // Created: 04/11/98 -// RCS-ID: $Id$ // Copyright: (c) Wolfram Gloger and Guilhem Lavaux // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "module.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #include "wx/module.h" -#include "wx/hash.h" + +#ifndef WX_PRECOMP + #include "wx/hash.h" + #include "wx/intl.h" + #include "wx/log.h" +#endif + #include "wx/listimpl.cpp" -WX_DEFINE_LIST(wxModuleList); +#define TRACE_MODULE wxT("module") + +WX_DEFINE_LIST(wxModuleList) -IMPLEMENT_CLASS(wxModule, wxObject) +wxIMPLEMENT_ABSTRACT_CLASS(wxModule, wxObject) wxModuleList wxModule::m_modules; void wxModule::RegisterModule(wxModule* module) { + module->m_state = State_Registered; m_modules.Append(module); } void wxModule::UnregisterModule(wxModule* module) { m_modules.DeleteObject(module); + delete module; } // Collect up all module-derived classes, create an instance of each, // and register them. void wxModule::RegisterModules() { - wxNode *node; - wxClassInfo* classInfo; - - wxClassInfo::sm_classTable->BeginFind(); - node = wxClassInfo::sm_classTable->Next(); - while (node) + for (wxClassInfo::const_iterator it = wxClassInfo::begin_classinfo(), + end = wxClassInfo::end_classinfo(); + it != end; ++it) { - classInfo = (wxClassInfo *)node->GetData(); - if ( classInfo->IsKindOf(CLASSINFO(wxModule)) && - (classInfo != (& (wxModule::sm_classwxModule))) ) + const wxClassInfo* classInfo = *it; + + if ( classInfo->IsKindOf(wxCLASSINFO(wxModule)) && + (classInfo != (& (wxModule::ms_classInfo))) ) { + wxLogTrace(TRACE_MODULE, wxT("Registering module %s"), + classInfo->GetClassName()); wxModule* module = (wxModule *)classInfo->CreateObject(); - RegisterModule(module); + wxModule::RegisterModule(module); } - node = wxClassInfo::sm_classTable->Next(); } } -bool wxModule::InitializeModules() +bool wxModule::DoInitializeModule(wxModule *module, + wxModuleList &initializedModules) { - // Initialize user-defined modules - wxModuleList::Node *node; - for ( node = m_modules.GetFirst(); node; node = node->GetNext() ) + if ( module->m_state == State_Initializing ) + { + wxLogError(_("Circular dependency involving module \"%s\" detected."), + module->GetClassInfo()->GetClassName()); + return false; + } + + module->m_state = State_Initializing; + + // translate named dependencies to the normal ones first + if ( !module->ResolveNamedDependencies() ) + return false; + + const wxArrayClassInfo& dependencies = module->m_dependencies; + + // satisfy module dependencies by loading them before the current module + for ( unsigned int i = 0; i < dependencies.size(); ++i ) { - if ( !node->GetData()->Init() ) + wxClassInfo * cinfo = dependencies[i]; + + // Check if the module is already initialized + wxModuleList::compatibility_iterator node; + for ( node = initializedModules.GetFirst(); node; node = node->GetNext() ) + { + if ( node->GetData()->GetClassInfo() == cinfo ) + break; + } + + if ( node ) + { + // this dependency is already initialized, nothing to do + continue; + } + + // find the module in the registered modules list + for ( node = m_modules.GetFirst(); node; node = node->GetNext() ) { - // clean up already initialized modules - process in reverse order - wxModuleList::Node *n; - for ( n = node->GetPrevious(); n; n = n->GetPrevious() ) + wxModule *moduleDep = node->GetData(); + if ( moduleDep->GetClassInfo() == cinfo ) { - n->GetData()->OnExit(); + if ( !DoInitializeModule(moduleDep, initializedModules ) ) + { + // failed to initialize a dependency, so fail this one too + return false; + } + + break; } + } - return FALSE; + if ( !node ) + { + wxLogError(_("Dependency \"%s\" of module \"%s\" doesn't exist."), + cinfo->GetClassName(), + module->GetClassInfo()->GetClassName()); + return false; } } - return TRUE; + if ( !module->Init() ) + { + wxLogError(_("Module \"%s\" initialization failed"), + module->GetClassInfo()->GetClassName()); + return false; + } + + wxLogTrace(TRACE_MODULE, wxT("Module \"%s\" initialized"), + module->GetClassInfo()->GetClassName()); + + module->m_state = State_Initialized; + initializedModules.Append(module); + + return true; +} + +// Initialize user-defined modules +bool wxModule::InitializeModules() +{ + wxModuleList initializedModules; + + for ( wxModuleList::compatibility_iterator node = m_modules.GetFirst(); + node; + node = node->GetNext() ) + { + wxModule *module = node->GetData(); + + // the module could have been already initialized as dependency of + // another one + if ( module->m_state == State_Registered ) + { + if ( !DoInitializeModule( module, initializedModules ) ) + { + // failed to initialize all modules, so clean up the already + // initialized ones + DoCleanUpModules(initializedModules); + + return false; + } + } + } + + // remember the real initialisation order + m_modules = initializedModules; + + return true; } -void wxModule::CleanUpModules() +// Clean up all currently initialized modules +void wxModule::DoCleanUpModules(const wxModuleList& modules) { - // Cleanup user-defined modules - wxModuleList::Node *node; - for ( node = m_modules.GetFirst(); node; node = node->GetNext() ) + // cleanup user-defined modules in the reverse order compared to their + // initialization -- this ensures that dependencies are respected + for ( wxModuleList::compatibility_iterator node = modules.GetLast(); + node; + node = node->GetPrevious() ) { - node->GetData()->Exit(); + wxLogTrace(TRACE_MODULE, wxT("Cleanup module %s"), + node->GetData()->GetClassInfo()->GetClassName()); + + wxModule * module = node->GetData(); + + wxASSERT_MSG( module->m_state == State_Initialized, + wxT("not initialized module being cleaned up") ); + + module->Exit(); + module->m_state = State_Registered; } - m_modules.DeleteContents(TRUE); - m_modules.Clear(); + // clear all modules, even the non-initialized ones + WX_CLEAR_LIST(wxModuleList, m_modules); } +bool wxModule::ResolveNamedDependencies() +{ + // first resolve required dependencies + for ( size_t i = 0; i < m_namedDependencies.size(); ++i ) + { + wxClassInfo *info = wxClassInfo::FindClass(m_namedDependencies[i]); + + if ( !info ) + { + // required dependency not found + return false; + } + + // add it even if it is not derived from wxModule because + // DoInitializeModule() will make sure a module with the same class + // info exists and fail if it doesn't + m_dependencies.Add(info); + } + + return true; +}