/////////////////////////////////////////////////////////////////////////////
-// 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)
// Created: 03/12/01
// RCS-ID: $Id$
// Copyright: (c) 2001 Ron Lee <ron@debian.org>
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "dynload.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#if wxUSE_DYNAMIC_LOADER
#ifdef __WINDOWS__
-#include "wx/msw/private.h"
+ #include "wx/msw/private.h"
#endif
#ifndef WX_PRECOMP
-#include "wx/log.h"
-#include "wx/intl.h"
+ #include "wx/log.h"
+ #include "wx/intl.h"
+ #include "wx/hash.h"
+ #include "wx/utils.h"
+ #include "wx/module.h"
#endif
-#include "wx/dynload.h"
+#include "wx/strconv.h"
+#include "wx/dynload.h"
-// ============================================================================
-// 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."));
-
- if( !(flags & wxDL_VERBATIM) )
- libname += GetDllExt();
-
-#if defined(__WXMAC__) && !defined(__UNIX__)
- 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)
-
-#ifdef __VMS
- 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
-
-#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(__DARWIN__)
- NSObjectFileImage ofile;
- int dyld_result = NSCreateObjectFileImageFromFile(libname.c_str(), &ofile);
-
- if (dyld_result != NSObjectFileImageSuccess)
- {
- TranslateError(libname.c_str(), OFImage, dyld_result);
- }
- else
- {
- // NSLinkModule will cause the run to abort on any link error's
- // not very friendly but the error recovery functionality is limited.
- m_handle = NSLinkModule(ofile, libname.c_str(), TRUE);
- }
-
-#elif defined(__WINDOWS__)
- m_handle = ::LoadLibrary(libname.c_str());
+public:
+ wxPluginLibraryModule() { }
-#else
-#error "runtime shared lib support not implemented"
-#endif
-
- if ( m_handle == 0 )
+ // TODO: create ms_classes on demand, why always preallocate it?
+ virtual bool OnInit()
{
- wxString msg(_("Failed to load shared library '%s'"));
-#ifdef HAVE_DLERROR
- const wxChar *err = dlerror();
- if( err )
- wxLogError( msg, err );
-#else
- wxLogSysError( msg, libname.c_str() );
-#endif
+ wxPluginLibrary::ms_classes = new wxDLImports;
+ wxPluginManager::CreateManifest();
+ return true;
}
- return IsLoaded();
-}
-
-void wxDynamicLibrary::Unload()
-{
- if( IsLoaded() )
+ virtual void OnExit()
{
-#if defined(__WXPM__) || defined(__EMX__)
- DosFreeModule( m_handle );
-#elif defined(HAVE_DLOPEN)
- dlclose( m_handle );
-#elif defined(HAVE_SHL_LOAD)
- shl_unload( m_handle );
-#elif defined(__WINDOWS__)
- ::FreeLibrary( m_handle );
-#elif defined(__WXMAC__)
- CloseConnection( &m_handle );
-#else
-#error "runtime shared lib support not implemented"
-#endif
- m_handle = 0;
+ wxDELETE(wxPluginLibrary::ms_classes);
+ wxPluginManager::ClearManifest();
}
-}
-
-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(__UNIX__)
- 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)
- 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(__DARWIN__)
- if( NSIsSymbolNameDefined( name.c_str() ) )
- symbol = NSAddressOfSymbol( NSLookupAndBindSymbol( name.c_str() ) );
-
-#elif defined(__WINDOWS__)
- symbol = ::GetProcAddress( m_handle, name.mb_str() );
-
-#else
-#error "runtime shared lib support not implemented"
-#endif
-
- if ( !symbol )
- {
- wxString msg(_("wxDynamicLibrary failed to GetSymbol '%s'"));
-#ifdef HAVE_DLERROR
- 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
- }
- if( success )
- *success = !failed;
-
- return symbol;
-}
-
-
-// ---------------------------------------------------------------------------
-// wxPluginLibrary
-// ---------------------------------------------------------------------------
+private:
+ DECLARE_DYNAMIC_CLASS(wxPluginLibraryModule )
+};
+IMPLEMENT_DYNAMIC_CLASS(wxPluginLibraryModule, wxModule)
-wxDLImports wxPluginLibrary::ms_classes(wxKEY_STRING);
wxPluginLibrary::wxPluginLibrary(const wxString &libname, int flags)
: m_linkcount(1)
, m_objcount(0)
{
- m_before = wxClassInfo::sm_first;
+ m_before = wxClassInfo::GetFirst();
Load( libname, flags );
- m_after = wxClassInfo::sm_first;
+ m_after = wxClassInfo::GetFirst();
if( m_handle != 0 )
{
- UpdateClassInfo();
+ UpdateClasses();
RegisterModules();
}
else
- --m_linkcount; // Flag us for deletion
+ {
+ // Flag us for deletion
+ --m_linkcount;
+ }
}
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)
+ for (const wxClassInfo *info = m_after; info != m_before; 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);
- }
}
-void wxPluginLibrary::RestoreClassInfo()
+void wxPluginLibrary::RestoreClasses()
{
- wxClassInfo *info;
-
- for(info = m_after; info != m_before; info = info->m_next)
- {
- wxClassInfo::sm_classTable->Delete(info->m_className);
- ms_classes.Delete(info->m_className);
- }
+ // Check if there is a need to restore classes.
+ if (!ms_classes)
+ return;
- if( wxClassInfo::sm_first == m_after )
- wxClassInfo::sm_first = m_before;
- else
+ for(const wxClassInfo *info = m_after; info != m_before; 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"))
-
- info->m_next = m_before;
+ ms_classes->erase(ms_classes->find(info->GetClassName()));
}
}
// 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)
+ for ( const wxClassInfo *info = m_after; info != m_before; info = info->GetNext())
{
if( info->IsKindOf(CLASSINFO(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);
+ m_wxmodules.push_back(m);
wxModule::RegisterModule(m);
}
}
// 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.
// 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->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(wxKEY_STRING);
+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();
- 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();
- 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());
+
+ return false;
+ }
+
+ wxLogTrace(wxT("dll"), wxT("UnloadLibrary(%s)"), realname.c_str());
+
+ if ( !entry->UnrefLib() )
+ {
+ // not really unloaded yet
+ return false;
+ }
- for(node = ms_manifest.Next(); node; node = ms_manifest.Next())
- if( ((wxPluginLibrary*)node->GetData())->GetLibHandle() == handle )
- return (wxPluginLibrary*)node->GetData();
+ ms_manifest->erase(ms_manifest->find(realname));
- return 0;
+ return true;
}
-#endif
// ------------------------
// Class implementation
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.
-
- for(node = ms_manifest.Next(); node; node = ms_manifest.Next())
- if( (wxPluginLibrary*)node->GetData() == m_entry )
- break;
-
- if( m_entry && m_entry->UnrefLib() )
- {
- delete node;
- m_entry = 0;
- }
-}
-
-
-#ifdef __DARWIN__
-// ---------------------------------------------------------------------------
-// For Darwin/Mac OS X
-// supply the sun style dlopen functions in terms of Darwin NS*
-// ---------------------------------------------------------------------------
-
-extern "C" {
-#import <mach-o/dyld.h>
-};
-
-enum dyldErrorSource
-{
- OFImage,
-};
+ wxCHECK_RET( m_entry, wxT("unloading an invalid wxPluginManager?") );
-static char dl_last_error[1024];
-
-static void TranslateError(const char *path, enum dyldErrorSource type, int number)
-{
- unsigned int index;
- static char *OFIErrorStrings[] =
+ for ( wxDLManifest::iterator i = ms_manifest->begin();
+ i != ms_manifest->end();
+ ++i )
{
- "%s(%d): Object Image Load Failure\n",
- "%s(%d): Object Image Load Success\n",
- "%s(%d): Not an recognisable object file\n",
- "%s(%d): No valid architecture\n",
- "%s(%d): Object image has an invalid format\n",
- "%s(%d): Invalid access (permissions?)\n",
- "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
- };
-#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
-
- switch (type)
- {
- case OFImage:
- index = number;
- if (index > NUM_OFI_ERRORS - 1) {
- index = NUM_OFI_ERRORS - 1;
- }
- sprintf(dl_last_error, OFIErrorStrings[index], path, number);
- break;
-
- default:
- sprintf(dl_last_error, "%s(%d): Totally unknown error type %d\n",
- path, number, type);
- break;
+ if ( i->second == m_entry )
+ {
+ ms_manifest->erase(i);
+ break;
+ }
}
-}
-
-#endif // __DARWIN__
-
-
-// ---------------------------------------------------------------------------
-// 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
projects / wxWidgets.git / blobdiff