/////////////////////////////////////////////////////////////////////////////
-// 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
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "dynload.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#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
-// ---------------------------------------------------------------------------
-
-//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 wxChar *wxDynamicLibrary::ms_dllext = _T(".dll");
-#elif defined(__UNIX__)
- #if defined(__HPUX__)
- const wxChar *wxDynamicLibrary::ms_dllext = _T(".sl");
- #else
- const wxChar *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
-}
-
-bool wxDynamicLibrary::Load(wxString libname, int flags)
-{
- 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();
- }
- }
-
- // different ways to load a shared library
- //
- // FIXME: should go to the platform-specific files!
-#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 // !__VMS && !__DARWIN__
- int rtldFlags = 0;
-
- if ( flags & wxDL_LAZY )
- {
- wxASSERT_MSG( (flags & wxDL_NOW) == 0,
- _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
-#ifdef RTLD_LAZY
- rtldFlags |= RTLD_LAZY;
-#else
- wxLogDebug(_T("wxDL_LAZY is not supported on this platform"));
-#endif
- }
- else if ( flags & wxDL_NOW )
- {
-#ifdef RTLD_NOW
- rtldFlags |= RTLD_NOW;
-#else
- wxLogDebug(_T("wxDL_NOW is not supported on this platform"));
-#endif
- }
-
- if ( flags & wxDL_GLOBAL )
- {
-#ifdef RTLD_GLOBAL
- rtldFlags |= RTLD_GLOBAL;
-#else
- wxLogDebug(_T("RTLD_GLOBAL is not supported on this platform."));
-#endif
- }
-
- m_handle = dlopen(libname.fn_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.fn_str(), BIND_DEFERRED, 0);
-
-#elif defined(__WINDOWS__)
- m_handle = ::LoadLibrary(libname.c_str());
-#else
- #error "runtime shared lib support not implemented on this platform"
-#endif
-
- if ( m_handle == 0 )
- {
- wxString msg(_("Failed to load shared library '%s'"));
-#if defined(HAVE_DLERROR) && !defined(__EMX__)
-
-#if wxUSE_UNICODE
- wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
- const wxChar *err = buffer;
-#else
- const wxChar *err = dlerror();
-#endif
-
- if( err )
- wxLogError( msg, err );
-#else
- wxLogSysError( msg, libname.c_str() );
-#endif
- }
-
- return IsLoaded();
-}
-
-void wxDynamicLibrary::Unload()
-{
- if( IsLoaded() )
- {
-#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;
- }
-}
-
-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.fn_str() );
-
-#elif defined(HAVE_SHL_LOAD)
- // use local variable since shl_findsym modifies the handle argument
- // to indicate where the symbol was found (GD)
- wxDllType the_handle = m_handle;
- if( shl_findsym( &the_handle, name.fn_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 )
- {
-#if defined(HAVE_DLERROR) && !defined(__EMX__)
-
-#if wxUSE_UNICODE
- wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
- const wxChar *err = buffer;
-#else
- const wxChar *err = dlerror();
-#endif
-
- if( err )
- {
- wxLogError(wxT("%s"), err);
- }
-#else
- failed = TRUE;
- wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
- name.c_str());
-#endif
- }
- if( success )
- *success = !failed;
-
- return symbol;
-}
// ---------------------------------------------------------------------------
// TODO: create ms_classes on demand, why always preallocate it?
virtual bool OnInit()
{
- wxPluginLibrary::ms_classes = new wxDLImports(wxKEY_STRING);
+ 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;
}
- }
- 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->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;
+ 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;
}
}
// 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, wxT("wxDynamicCast of wxModule failed") );
- wxASSERT_MSG( m, _T("wxDynamicCast of wxModule failed") );
+ m_wxmodules.push_back(m);
+ wxModule::RegisterModule(m);
+ }
- m_wxmodules.Append(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 = 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.
// 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;
void wxPluginLibrary::UnregisterModules()
{
- wxModuleList::Node *node;
+ wxModuleList::iterator it;
- for ( node = m_wxmodules.GetFirst(); node; 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 = 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();
}
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;
-}
-
-#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;
+ return true;
}
-#endif // WXWIN_COMPATIBILITY_2_2
// ------------------------
// Class implementation
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();
if ( i->second == m_entry )
{
ms_manifest->erase(i);
- return;
+ break;
}
}
m_entry = NULL;
}
-// ---------------------------------------------------------------------------
-// wxDllLoader (all these methods are static)
-// ---------------------------------------------------------------------------
-
-#if WXWIN_COMPATIBILITY_2_2
-
-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);
-}
-
-#endif // WXWIN_COMPATIBILITY_2_2
-
#endif // wxUSE_DYNAMIC_LOADER
-
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