X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/32b70aec1ff90877ae0ce2ce82967f698218fbdc..0646084eb258e28101c2cc3dc0173f665c2dfa2d:/src/common/dynload.cpp diff --git a/src/common/dynload.cpp b/src/common/dynload.cpp index 5171240c34..7d26dc392f 100644 --- a/src/common/dynload.cpp +++ b/src/common/dynload.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// 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) @@ -7,13 +7,9 @@ // Created: 03/12/01 // RCS-ID: $Id$ // Copyright: (c) 2001 Ron Lee -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dynload.h" -#endif - // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- @@ -33,263 +29,41 @@ #ifndef WX_PRECOMP #include "wx/log.h" #include "wx/intl.h" + #include "wx/hash.h" + #include "wx/utils.h" + #include "wx/module.h" #endif -#include "wx/filename.h" // for SplitPath() +#include "wx/strconv.h" #include "wx/dynload.h" -#include "wx/module.h" - -#if defined(__DARWIN__) -/* Porting notes: - * The dlopen port is a port from dl_next.xs by Anno Siegel. - * dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess. - * The method used here is just to supply the sun style dlopen etc. - * functions in terms of Darwin NS*. - */ -void *dlopen(const char *path, int mode /* mode is ignored */); -void *dlsym(void *handle, const char *symbol); -int dlclose(void *handle); -const char *dlerror(void); -#endif -// ============================================================================ -// implementation -// ============================================================================ // --------------------------------------------------------------------------- -// wxDynamicLibrary +// wxPluginLibrary // --------------------------------------------------------------------------- -//FIXME: This class isn't really common at all, it should be moved into -// platform dependent files. - -#if defined(__WINDOWS__) || defined(__WXPM__) || defined(__EMX__) -const wxString wxDynamicLibrary::ms_dllext( _T(".dll") ); -#elif defined(__UNIX__) -#if defined(__HPUX__) -const wxString wxDynamicLibrary::ms_dllext( _T(".sl") ); -#else -const wxString wxDynamicLibrary::ms_dllext( _T(".so") ); -#endif -#endif -wxDllType wxDynamicLibrary::GetProgramHandle() -{ -#if defined( HAVE_DLOPEN ) && !defined(__EMX__) - return dlopen(0, RTLD_LAZY); -#elif defined (HAVE_SHL_LOAD) - return PROG_HANDLE; -#else - wxFAIL_MSG( wxT("This method is not implemented under Windows or OS/2")); - return 0; -#endif -} +wxDLImports* wxPluginLibrary::ms_classes = NULL; -bool wxDynamicLibrary::Load(wxString libname, int flags) +class wxPluginLibraryModule : public wxModule { - wxASSERT_MSG(m_handle == 0, _T("Library already loaded.")); - - // add the proper extension for the DLL ourselves unless told not to - if ( !(flags & wxDL_VERBATIM) ) - { - // and also check that the libname doesn't already have it - wxString ext; - wxFileName::SplitPath(libname, NULL, NULL, &ext); - if ( ext.empty() ) - { - libname += GetDllExt(); - } - } - -#if defined(__WXMAC__) && !defined(__DARWIN__) - FSSpec myFSSpec; - Ptr myMainAddr; - Str255 myErrName; - - wxMacFilename2FSSpec( libname , &myFSSpec ); - - if( GetDiskFragment( &myFSSpec, - 0, - kCFragGoesToEOF, - "\p", - kPrivateCFragCopy, - &m_handle, - &myMainAddr, - myErrName ) != noErr ) - { - p2cstr( myErrName ); - wxLogSysError( _("Failed to load shared library '%s' Error '%s'"), - libname.c_str(), - (char*)myErrName ); - m_handle = 0; - } - -#elif defined(__WXPM__) || defined(__EMX__) - char err[256] = ""; - DosLoadModule(err, sizeof(err), libname.c_str(), &m_handle); - -#elif defined(HAVE_DLOPEN) || defined(__DARWIN__) - -#if defined(__VMS) || defined(__DARWIN__) - m_handle = dlopen(libname.c_str(), 0); // The second parameter is ignored -#else - int rtldFlags = 0; - - if( flags & wxDL_LAZY ) - { - wxASSERT_MSG( (flags & wxDL_NOW) == 0, - _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") ); - rtldFlags |= RTLD_LAZY; - } - else if( flags & wxDL_NOW ) - { - rtldFlags |= RTLD_NOW; - } - if( flags & wxDL_GLOBAL ) - { -#ifdef __osf__ - wxLogDebug(_T("WARNING: RTLD_GLOBAL is not a supported on this platform.")); -#endif - rtldFlags |= RTLD_GLOBAL; - } - - m_handle = dlopen(libname.c_str(), rtldFlags); -#endif // __VMS || __DARWIN__ - -#elif defined(HAVE_SHL_LOAD) - int shlFlags = 0; - - if( flags & wxDL_LAZY ) - { - wxASSERT_MSG( (flags & wxDL_NOW) == 0, - _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") ); - shlFlags |= BIND_DEFERRED; - } - else if( flags & wxDL_NOW ) - { - shlFlags |= BIND_IMMEDIATE; - } - m_handle = shl_load(libname.c_str(), BIND_DEFERRED, 0); - -#elif defined(__WINDOWS__) - m_handle = ::LoadLibrary(libname.c_str()); - -#else -#error "runtime shared lib support not implemented" -#endif - - if ( m_handle == 0 ) - { - wxString msg(_("Failed to load shared library '%s'")); -#if defined(HAVE_DLERROR) && !defined(__EMX__) - const wxChar *err = dlerror(); - if( err ) - wxLogError( msg, err ); -#else - wxLogSysError( msg, libname.c_str() ); -#endif - } - - return IsLoaded(); -} +public: + wxPluginLibraryModule() { } -void wxDynamicLibrary::Unload() -{ - if( IsLoaded() ) + // TODO: create ms_classes on demand, why always preallocate it? + virtual bool OnInit() { -#if defined(__WXPM__) || defined(__EMX__) - DosFreeModule( m_handle ); -#elif defined(HAVE_DLOPEN) || defined(__DARWIN__) - dlclose( m_handle ); -#elif defined(HAVE_SHL_LOAD) - shl_unload( m_handle ); -#elif defined(__WINDOWS__) - ::FreeLibrary( m_handle ); -#elif defined(__WXMAC__) && !defined(__DARWIN__) - CloseConnection( (CFragConnectionID*) &m_handle ); -#else -#error "runtime shared lib support not implemented" -#endif - m_handle = 0; + wxPluginLibrary::ms_classes = new wxDLImports; + wxPluginManager::CreateManifest(); + return true; } -} - -void *wxDynamicLibrary::GetSymbol(const wxString &name, bool *success) const -{ - wxCHECK_MSG( IsLoaded(), NULL, - _T("Can't load symbol from unloaded library") ); - - bool failed = FALSE; - void *symbol = 0; - -#if defined(__WXMAC__) && !defined(__DARWIN__) - Ptr symAddress; - CFragSymbolClass symClass; - Str255 symName; -#if TARGET_CARBON - c2pstrcpy( (StringPtr) symName, name ); -#else - strcpy( (char *)symName, name ); - c2pstr( (char *)symName ); -#endif - if( FindSymbol( dllHandle, symName, &symAddress, &symClass ) == noErr ) - symbol = (void *)symAddress; - -#elif defined(__WXPM__) || defined(__EMX__) - DosQueryProcAddr( m_handle, 1L, name.c_str(), (PFN*)symbol ); - -#elif defined(HAVE_DLOPEN) || defined(__DARWIN__) - symbol = dlsym( m_handle, name.c_str() ); -#elif defined(HAVE_SHL_LOAD) - if( shl_findsym( &m_handle, name.c_str(), TYPE_UNDEFINED, &symbol ) != 0 ) - symbol = 0; - -#elif defined(__WINDOWS__) - symbol = (void*) ::GetProcAddress( m_handle, name.mb_str() ); - -#else -#error "runtime shared lib support not implemented" -#endif - - if ( !symbol ) + virtual void OnExit() { - wxString msg(_("wxDynamicLibrary failed to GetSymbol '%s'")); -#if defined(HAVE_DLERROR) && !defined(__EMX__) - const wxChar *err = dlerror(); - if( err ) - { - failed = TRUE; - wxLogError( msg, err ); - } -#else - failed = TRUE; - wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"), - name.c_str()); -#endif + wxDELETE(wxPluginLibrary::ms_classes); + wxPluginManager::ClearManifest(); } - if( success ) - *success = !failed; - - return symbol; -} - - -// --------------------------------------------------------------------------- -// wxPluginLibrary -// --------------------------------------------------------------------------- - - -wxDLImports* wxPluginLibrary::ms_classes = NULL; - -class wxPluginLibraryModule : public wxModule -{ -public: - wxPluginLibraryModule() {} - bool OnInit() { wxPluginLibrary::ms_classes = new wxDLImports(wxKEY_STRING); wxPluginManager::CreateManifest(); return TRUE; } - void OnExit() { delete wxPluginLibrary::ms_classes; wxPluginLibrary::ms_classes = NULL; - wxPluginManager::ClearManifest(); } private: DECLARE_DYNAMIC_CLASS(wxPluginLibraryModule ) @@ -302,17 +76,44 @@ wxPluginLibrary::wxPluginLibrary(const wxString &libname, int flags) : 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 - --m_linkcount; // Flag us for deletion + { + // Flag us for deletion + --m_linkcount; + } } wxPluginLibrary::~wxPluginLibrary() @@ -320,83 +121,71 @@ wxPluginLibrary::~wxPluginLibrary() if( m_handle != 0 ) { UnregisterModules(); - RestoreClassInfo(); + RestoreClasses(); } } +wxPluginLibrary *wxPluginLibrary::RefLib() +{ + wxCHECK_MSG( m_linkcount > 0, NULL, + 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") ); - if( m_linkcount == 0 || --m_linkcount == 0 ) + wxASSERT_MSG( m_objcount == 0, + wxT("Library unloaded before all objects were destroyed") ); + + 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. - - if( ms_classes->Get(info->m_className) == 0 ) - ms_classes->Put(info->m_className, (wxObject *) this); + (*ms_classes)[info->GetClassName()] = this; } - } - for(info = m_after; info != m_before; info = info->m_next) - { - if( info->m_baseClassName1 ) - info->m_baseInfo1 = (wxClassInfo *)t->Get(info->m_baseClassName1); - if( info->m_baseClassName2 ) - info->m_baseInfo2 = (wxClassInfo *)t->Get(info->m_baseClassName2); + 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->Delete(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; + ms_classes->erase(ms_classes->find(info->GetClassName())); - wxASSERT_MSG( info, _T("ClassInfo from wxPluginLibrary not found on purge")) - - info->m_next = m_before; + if ( info == m_ourLast ) + break; } } @@ -411,28 +200,36 @@ void wxPluginLibrary::RegisterModules() // 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.Append(m); - wxModule::RegisterModule(m); + m_wxmodules.push_back(m); + wxModule::RegisterModule(m); + } + + if ( info == m_ourLast ) + break; } } // FIXME: Likewise this is (well was) very similar to InitializeModules() - for(wxModuleList::Node *node = m_wxmodules.GetFirst(); node; node->GetNext()) + for ( wxModuleList::iterator it = m_wxmodules.begin(); + it != m_wxmodules.end(); + ++it) { - if( !node->GetData()->Init() ) + 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. @@ -441,13 +238,14 @@ void wxPluginLibrary::RegisterModules() // let the dtor Exit the rest on shutdown, (which we'll initiate // shortly). - wxModuleList::Node *oldNode = 0; + wxModuleList::iterator oldNode = m_wxmodules.end(); do { - node = node->GetNext(); - delete oldNode; - wxModule::UnregisterModule( node->GetData() ); - oldNode = node; - } while( node ); + ++it; + if( oldNode != m_wxmodules.end() ) + m_wxmodules.erase(oldNode); + wxModule::UnregisterModule( *it ); + oldNode = it; + } while( it != m_wxmodules.end() ); --m_linkcount; // Flag us for deletion break; @@ -457,20 +255,21 @@ void wxPluginLibrary::RegisterModules() void wxPluginLibrary::UnregisterModules() { - wxModuleList::Node *node; + wxModuleList::iterator it; - for(node = m_wxmodules.GetFirst(); node; node->GetNext()) - node->GetData()->Exit(); + for ( it = m_wxmodules.begin(); it != m_wxmodules.end(); ++it ) + (*it)->Exit(); - for(node = m_wxmodules.GetFirst(); node; node->GetNext()) - wxModule::UnregisterModule( node->GetData() ); + for ( it = m_wxmodules.begin(); it != m_wxmodules.end(); ++it ) + wxModule::UnregisterModule( *it ); - m_wxmodules.DeleteContents(TRUE); + // NB: content of the list was deleted by UnregisterModule calls above: + m_wxmodules.clear(); } // --------------------------------------------------------------------------- -// wxPluginLibrary +// wxPluginManager // --------------------------------------------------------------------------- wxDLManifest* wxPluginManager::ms_manifest = NULL; @@ -479,64 +278,96 @@ wxDLManifest* wxPluginManager::ms_manifest = NULL; // Static accessors // ------------------------ -wxPluginLibrary *wxPluginManager::LoadLibrary(const wxString &libname, int flags) +wxPluginLibrary * +wxPluginManager::LoadLibrary(const wxString &libname, int flags) { wxString realname(libname); if( !(flags & wxDL_VERBATIM) ) - realname += wxDynamicLibrary::GetDllExt(); + realname += wxDynamicLibrary::GetDllExt(wxDL_MODULE); - wxPluginLibrary *entry = (wxPluginLibrary*) ms_manifest->Get(realname); + wxPluginLibrary *entry; - if( entry != 0 ) + if ( flags & wxDL_NOSHARE ) + { + entry = NULL; + } + else { + entry = FindByName(realname); + } + + if ( entry ) + { + wxLogTrace(wxT("dll"), + wxT("LoadLibrary(%s): already loaded."), realname.c_str()); + entry->RefLib(); } else { entry = new wxPluginLibrary( libname, flags ); - if( entry->IsLoaded() ) + if ( entry->IsLoaded() ) { - ms_manifest->Put(realname, (wxObject*) entry); + (*ms_manifest)[realname] = entry; + + wxLogTrace(wxT("dll"), + wxT("LoadLibrary(%s): loaded ok."), realname.c_str()); + } else { - wxCHECK_MSG( entry->UnrefLib(), 0, - _T("Currently linked library is, ..not loaded??") ); - entry = 0; + 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( wxT("Currently linked library is not loaded?") ); + } + + entry = NULL; } } + return entry; } -bool wxPluginManager::UnloadLibrary(const wxString &libname) +bool wxPluginManager::UnloadLibrary(const wxString& libname) { - wxPluginLibrary *entry = (wxPluginLibrary*) ms_manifest->Get(libname); + wxString realname = libname; - if( !entry ) - entry = (wxPluginLibrary*) ms_manifest->Get(libname + wxDynamicLibrary::GetDllExt()); + wxPluginLibrary *entry = FindByName(realname); - if( entry ) - return entry->UnrefLib(); + if ( !entry ) + { + realname += wxDynamicLibrary::GetDllExt(wxDL_MODULE); - wxLogDebug(_T("Attempt to Unlink library '%s' (which is not linked)."), libname.c_str()); - return FALSE; -} + entry = FindByName(realname); + } -#if WXWIN_COMPATIBILITY_2_2 -wxPluginLibrary *wxPluginManager::GetObjectFromHandle(wxDllType handle) -{ - wxNode *node; - ms_manifest->BeginFind(); + if ( !entry ) + { + wxLogDebug(wxT("Attempt to unload library '%s' which is not loaded."), + libname.c_str()); - for(node = ms_manifest->Next(); node; node = ms_manifest->Next()) - if( ((wxPluginLibrary*)node->GetData())->GetLibHandle() == handle ) - return (wxPluginLibrary*)node->GetData(); + return false; + } + + wxLogTrace(wxT("dll"), wxT("UnloadLibrary(%s)"), realname.c_str()); + + if ( !entry->UnrefLib() ) + { + // not really unloaded yet + return false; + } - return 0; + ms_manifest->erase(ms_manifest->find(realname)); + + return true; } -#endif // ------------------------ // Class implementation @@ -545,53 +376,28 @@ wxPluginLibrary *wxPluginManager::GetObjectFromHandle(wxDllType handle) bool wxPluginManager::Load(const wxString &libname, int flags) { m_entry = wxPluginManager::LoadLibrary(libname, flags); + return IsLoaded(); } void wxPluginManager::Unload() { - wxNode *node; - ms_manifest->BeginFind(); - - // It's either this or store the name of the lib just to do this. + wxCHECK_RET( m_entry, wxT("unloading an invalid wxPluginManager?") ); - for(node = ms_manifest->Next(); node; node = ms_manifest->Next()) - if( (wxPluginLibrary*)node->GetData() == m_entry ) - break; - - if( m_entry && m_entry->UnrefLib() ) + for ( wxDLManifest::iterator i = ms_manifest->begin(); + i != ms_manifest->end(); + ++i ) { - delete node; - m_entry = 0; + if ( i->second == m_entry ) + { + ms_manifest->erase(i); + break; + } } -} - -// --------------------------------------------------------------------------- -// wxDllLoader (all these methods are static) -// --------------------------------------------------------------------------- -#if WXWIN_COMPATIBILITY_2_2 + m_entry->UnrefLib(); -wxDllType wxDllLoader::LoadLibrary(const wxString &name) -{ - wxPluginLibrary *p = wxPluginManager::LoadLibrary(name, wxDL_DEFAULT | wxDL_VERBATIM); - return p->GetLibHandle(); + m_entry = NULL; } -void wxDllLoader::UnloadLibrary(wxDllType handle) -{ - wxPluginLibrary *p = wxPluginManager::GetObjectFromHandle(handle); - p->UnrefLib(); -} - -void *wxDllLoader::GetSymbol(wxDllType dllHandle, const wxString &name, bool *success) -{ - wxPluginLibrary *p = wxPluginManager::GetObjectFromHandle(dllHandle); - return p->GetSymbol(name, success); -} - -#endif // WXWIN_COMPATIBILITY_2_2 - #endif // wxUSE_DYNAMIC_LOADER - -// vi:sts=4:sw=4:et