/////////////////////////////////////////////////////////////////////////////
-// Name: object.cpp
+// Name: src/common/object.cpp
// Purpose: wxObject implementation
// Author: Julian Smart
-// Modified by:
+// Modified by: Ron Lee
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) 1998 Julian Smart and Markus Holzem
+// (c) 2001 Ron Lee <ron@debian.org>
+// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#ifndef WX_PRECOMP
#include "wx/hash.h"
-#include "wx/objstrm.h"
#endif
#include <string.h>
-#include <assert.h>
-#if (WXDEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT
+#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
#include "wx/memory.h"
#endif
-#if WXDEBUG || USE_DEBUG_CONTEXT
- // for wxObject::Dump
- #include <iostream.h>
-#endif
+#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
+ // for wxObject::Dump
+ #include "wx/ioswrap.h"
-#if !USE_SHARED_LIBRARY
-wxClassInfo wxObject::classwxObject((char *) "wxObject", (char *) NULL, (char *) NULL, (int ) sizeof(wxObject), (wxObjectConstructorFn) NULL);
-wxClassInfo *wxClassInfo::first = (wxClassInfo *) NULL;
-#endif
+ #if defined(__VISAGECPP__)
+ #define DEBUG_PRINTF(NAME) { static int raz=0; \
+ printf( #NAME " %i\n",raz); fflush(stdout); raz++; }
+ #else
+ #define DEBUG_PRINTF(NAME)
+ #endif
+#endif // __WXDEBUG__ || wxUSE_DEBUG_CONTEXT
-/*
- * wxWindows root object.
- */
-wxObject::wxObject(void)
-{
- m_refData = (wxObjectRefData *) NULL;
-}
+wxClassInfo wxObject::sm_classwxObject( wxT("wxObject"), 0, 0,
+ (int) sizeof(wxObject),
+ (wxObjectConstructorFn) 0 );
-wxObject::~wxObject(void)
-{
- UnRef();
-}
+wxClassInfo* wxClassInfo::sm_first = NULL;
+wxHashTable* wxClassInfo::sm_classTable = NULL;
+
+// These are here so we can avoid 'always true/false' warnings
+// by referring to these instead of TRUE/FALSE
+const bool wxTrue = TRUE;
+const bool wxFalse = FALSE;
-/*
- * Is this object a kind of (a subclass of) 'info'?
- * E.g. is wxWindow a kind of wxObject?
- * Go from this class to superclass, taking into account
- * two possible base classes.
- */
-
-bool wxObject::IsKindOf(wxClassInfo *info)
+// Is this object a kind of (a subclass of) 'info'?
+// E.g. is wxWindow a kind of wxObject?
+// Go from this class to superclass, taking into account
+// two possible base classes.
+bool wxObject::IsKindOf(wxClassInfo *info) const
{
- wxClassInfo *thisInfo = GetClassInfo();
- if (thisInfo)
- return thisInfo->IsKindOf(info);
- else
- return FALSE;
+ wxClassInfo *thisInfo = GetClassInfo();
+ return (thisInfo) ? thisInfo->IsKindOf(info) : FALSE ;
}
-#if WXDEBUG || USE_DEBUG_CONTEXT
-void wxObject::Dump(ostream& str)
+#if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT)
+void wxObject::Dump(wxSTD ostream& str)
{
- if (GetClassInfo() && GetClassInfo()->GetClassName())
- str << GetClassInfo()->GetClassName();
- else
- str << "unknown object class";
+ if (GetClassInfo() && GetClassInfo()->GetClassName())
+ str << GetClassInfo()->GetClassName();
+ else
+ str << _T("unknown object class");
}
#endif
-#if WXDEBUG && USE_MEMORY_TRACING
-#ifdef new
-#undef new
+#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING && defined( new )
+ #undef new
#endif
-void * wxObject::operator new (size_t size, char * fileName, int lineNum)
-{
- return wxDebugAlloc(size, fileName, lineNum, TRUE);
-}
-void wxObject::operator delete (void * buf)
+#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
+void *wxObject::operator new ( size_t size, const wxChar *fileName, int lineNum )
{
- wxDebugFree(buf);
+ return wxDebugAlloc(size, (wxChar*) fileName, lineNum, TRUE);
}
+#endif
-// Cause problems for VC++ - crashes
-#ifndef _MSC_VER
-void * wxObject::operator new[] (size_t size, char * fileName, int lineNum)
+#ifdef _WX_WANT_DELETE_VOID
+void wxObject::operator delete ( void *buf )
{
- return wxDebugAlloc(size, fileName, lineNum, TRUE, TRUE);
+ wxDebugFree(buf);
}
+#endif
-void wxObject::operator delete[] (void * buf)
+#ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
+void wxObject::operator delete ( void *buf, const char *_fname, size_t _line )
{
- wxDebugFree(buf, TRUE);
+ wxDebugFree(buf);
}
#endif
-#endif
-
-/*
- * Class info: provides run-time class type information.
- */
-
-wxClassInfo::wxClassInfo(char *cName, char *baseName1, char *baseName2, int sz, wxObjectConstructorFn constr)
+#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
+void wxObject::operator delete ( void *buf, const wxChar *WXUNUSED(fileName), int WXUNUSED(lineNum) )
{
- className = cName;
- baseClassName1 = baseName1;
- baseClassName2 = baseName2;
-
- objectSize = sz;
- objectConstructor = constr;
-
- next = first;
- first = this;
-
- baseInfo1 = (wxClassInfo *) NULL;
- baseInfo2 = (wxClassInfo *) NULL;
+ wxDebugFree(buf);
}
+#endif
-wxObject *wxClassInfo::CreateObject(void)
+#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
+void *wxObject::operator new[] ( size_t size, const wxChar* fileName, int lineNum )
{
- if (objectConstructor)
- return (wxObject *)(*objectConstructor)();
- else
- return (wxObject *) NULL;
+ return wxDebugAlloc(size, (wxChar*) fileName, lineNum, TRUE, TRUE);
}
+#endif
-wxClassInfo *wxClassInfo::FindClass(char *c)
+#ifdef _WX_WANT_ARRAY_DELETE_VOID
+void wxObject::operator delete[] ( void *buf )
{
- wxClassInfo *p = first;
- while (p)
- {
- if (p && p->GetClassName() && strcmp(p->GetClassName(), c) == 0)
- return p;
- p = p->next;
- }
- return (wxClassInfo *) NULL;
+ wxDebugFree(buf, TRUE);
}
+#endif
-// Climb upwards through inheritance hierarchy.
-// Dual inheritance is catered for.
-bool wxClassInfo::IsKindOf(wxClassInfo *info)
+#ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
+void wxObject::operator delete[] (void * buf, const wxChar* WXUNUSED(fileName), int WXUNUSED(lineNum) )
{
- if (info == NULL)
- return FALSE;
-
- // For some reason, when making/using a DLL, static data has to be included
- // in both the DLL and the application. This can lead to duplicate
- // wxClassInfo objects, so we have to test the name instead of the pointers.
-#if WXMAKINGDLL
- if (GetClassName() && info->GetClassName() && (strcmp(GetClassName(), info->GetClassName()) == 0))
- return TRUE;
-#else
- if (this == info)
- return TRUE;
+ wxDebugFree(buf, TRUE);
+}
#endif
- if (baseInfo1)
- if (baseInfo1->IsKindOf(info))
- return TRUE;
- if (baseInfo2)
- return baseInfo2->IsKindOf(info);
+// ----------------------------------------------------------------------------
+// wxClassInfo
+// ----------------------------------------------------------------------------
- return FALSE;
+wxClassInfo::~wxClassInfo()
+{
+ // remove this object from the linked list of all class infos: if we don't
+ // do it, loading/unloading a DLL containing static wxClassInfo objects is
+ // not going to work
+ if ( this == sm_first )
+ {
+ sm_first = m_next;
+ }
+ else
+ {
+ wxClassInfo *info = sm_first;
+ while (info)
+ {
+ if ( info->m_next == this )
+ {
+ info->m_next = m_next;
+ break;
+ }
+
+ info = info->m_next;
+ }
+ }
}
-// Set pointers to base class(es) to speed up IsKindOf
-void wxClassInfo::InitializeClasses(void)
+wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
{
- wxHashTable table(wxKEY_STRING);
-
- // Index all class infos by their class name
- wxClassInfo *info = first;
- while (info)
- {
- if (info->className)
- table.Put(info->className, (wxObject *)info);
- info = info->next;
- }
-
- // Set base pointers for each wxClassInfo
- info = first;
- while (info)
- {
- if (info->GetBaseClassName1())
- info->baseInfo1 = (wxClassInfo *)table.Get(info->GetBaseClassName1());
- if (info->GetBaseClassName2())
- info->baseInfo2 = (wxClassInfo *)table.Get(info->GetBaseClassName2());
- info = info->next;
- }
+ if ( sm_classTable )
+ {
+ return (wxClassInfo *)wxClassInfo::sm_classTable->Get(className);
+ }
+ else
+ {
+ for ( wxClassInfo *info = sm_first; info ; info = info->m_next )
+ {
+ if ( wxStrcmp(info->GetClassName(), className) == 0 )
+ return info;
+ }
+
+ return NULL;
+ }
}
-wxObject *wxCreateDynamicObject(char *name)
+// a tiny InitializeClasses() helper
+/* static */
+inline wxClassInfo *wxClassInfo::GetBaseByName(const wxChar *name)
{
- wxClassInfo *info = wxClassInfo::first;
- while (info)
- {
- if (info->className && strcmp(info->className, name) == 0)
- return info->CreateObject();
- info = info->next;
- }
- return (wxObject *) NULL;
-}
+ if ( !name )
+ return NULL;
-#ifdef USE_STORABLE_CLASSES
+ wxClassInfo *classInfo = (wxClassInfo *)sm_classTable->Get(name);
-#include "wx/serbase.h"
-#include "wx/dynlib.h"
-#include "wx/msgdlg.h"
+ // this must be fixed, other things risk work wrongly later if you get this
+ wxASSERT_MSG( classInfo,
+ wxString::Format
+ (
+ _T("base class '%s' is unknown to wxWindows RTTI"),
+ name
+ ) );
-wxObject* wxCreateStoredObject( wxInputStream &stream )
-{
- wxObjectInputStream obj_s(stream);
- return obj_s.LoadObject();
-};
+ return classInfo;
+}
-void wxObject::StoreObject( wxObjectOutputStream& stream )
+// Set pointers to base class(es) to speed up IsKindOf
+void wxClassInfo::InitializeClasses()
{
- wxString obj_name = wxString(GetClassInfo()->GetClassName()) + "_Serialize";
- wxLibrary *lib = wxTheLibraries.LoadLibrary("wxserial");
- WXSERIAL(wxObject) *serial;
+ // using IMPLEMENT_DYNAMIC_CLASS() macro twice (which may happen if you
+ // link any object module twice mistakenly) will break this function
+ // because it will enter an infinite loop and eventually die with "out of
+ // memory" - as this is quite hard to detect if you're unaware of this,
+ // try to do some checks here
+
+#ifdef __WXDEBUG__
+ static const size_t nMaxClasses = 10000; // more than we'll ever have
+ size_t nClass = 0;
+#endif
- if (!lib) {
- wxMessageBox("Can't load wxSerial dynamic library.", "Alert !");
- return;
- }
- serial = (WXSERIAL(wxObject) *)lib->CreateObject( obj_name );
+ sm_classTable = new wxHashTable(wxKEY_STRING);
- if (!serial) {
- wxString message;
+ // Index all class infos by their class name
- message.Printf("Can't find the serialization object (%s) for the object %s",
- WXSTRINGCAST obj_name, WXSTRINGCAST GetClassInfo()->GetClassName());
- wxMessageBox(message, "Alert !");
- return;
- }
+ wxClassInfo *info;
+ for(info = sm_first; info; info = info->m_next)
+ {
+ if (info->m_className)
+ {
+ wxASSERT_MSG( ++nClass < nMaxClasses,
+ _T("an infinite loop detected - have you used IMPLEMENT_DYNAMIC_CLASS() twice (may be by linking some object module(s) twice)?") );
+ sm_classTable->Put(info->m_className, (wxObject *)info);
+ }
+ }
- serial->SetObject(this);
- serial->StoreObject(stream);
+ // Set base pointers for each wxClassInfo
- delete serial;
+ for(info = sm_first; info; info = info->m_next)
+ {
+ info->m_baseInfo1 = GetBaseByName(info->GetBaseClassName1());
+ info->m_baseInfo2 = GetBaseByName(info->GetBaseClassName2());
+ }
}
-void wxObject::LoadObject( wxObjectInputStream& stream )
+void wxClassInfo::CleanUpClasses()
{
- wxString obj_name = wxString(GetClassInfo()->GetClassName()) + "_Serialize";
- wxLibrary *lib = wxTheLibraries.LoadLibrary("wxserial");
- WXSERIAL(wxObject) *serial =
- (WXSERIAL(wxObject) *)lib->CreateObject( obj_name );
-
- if (!serial) {
- wxString message;
+ delete wxClassInfo::sm_classTable;
+ wxClassInfo::sm_classTable = NULL;
+}
- message.Printf("Can't find the serialization object (%s) for the object %s",
- WXSTRINGCAST obj_name,
- WXSTRINGCAST GetClassInfo()->GetClassName());
- wxMessageBox(message, "Alert !");
- return;
- }
- serial->SetObject(this);
- serial->LoadObject(stream);
+wxObject *wxCreateDynamicObject(const wxChar *name)
+{
+#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
+ DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
+#endif
- delete serial;
+ if ( wxClassInfo::sm_classTable )
+ {
+ wxClassInfo *info = (wxClassInfo *)wxClassInfo::sm_classTable->Get(name);
+ return info ? info->CreateObject() : NULL;
+ }
+ else // no sm_classTable yet
+ {
+ for ( wxClassInfo *info = wxClassInfo::sm_first;
+ info;
+ info = info->m_next )
+ {
+ if (info->m_className && wxStrcmp(info->m_className, name) == 0)
+ return info->CreateObject();
+ }
+
+ return NULL;
+ }
}
-#endif
-/*
- * wxObject: cloning of objects
- */
+// ----------------------------------------------------------------------------
+// wxObject
+// ----------------------------------------------------------------------------
+
+// Initialize ref data from another object (needed for copy constructor and
+// assignment operator)
+void wxObject::InitFrom(const wxObject& other)
+{
+ m_refData = other.m_refData;
+ if ( m_refData )
+ m_refData->m_count++;
+}
void wxObject::Ref(const wxObject& clone)
{
+#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
+ DEBUG_PRINTF(wxObject::Ref)
+#endif
+
+ // nothing to be done
+ if (m_refData == clone.m_refData)
+ return;
+
// delete reference to old data
UnRef();
+
// reference new data
- if (clone.m_refData) {
+ if ( clone.m_refData )
+ {
m_refData = clone.m_refData;
++(m_refData->m_count);
}
}
-void wxObject::UnRef(void)
+void wxObject::UnRef()
{
- if (m_refData) {
- assert(m_refData->m_count > 0);
- --(m_refData->m_count);
- if (m_refData->m_count == 0)
+ if ( m_refData )
+ {
+ wxASSERT_MSG( m_refData->m_count > 0, _T("invalid ref data count") );
+
+ if ( !--m_refData->m_count )
delete m_refData;
+ m_refData = NULL;
+ }
+}
+
+void wxObject::AllocExclusive()
+{
+ if ( !m_refData )
+ {
+ m_refData = CreateRefData();
}
- m_refData = (wxObjectRefData *) NULL;
+ else if ( m_refData->GetRefCount() > 1 )
+ {
+ // note that ref is not going to be destroyed in this case
+ const wxObjectRefData* ref = m_refData;
+ UnRef();
+
+ // ... so we can still access it
+ m_refData = CloneRefData(ref);
+ }
+ //else: ref count is 1, we are exclusive owners of m_refData anyhow
+
+ wxASSERT_MSG( m_refData && m_refData->GetRefCount() == 1,
+ _T("wxObject::AllocExclusive() failed.") );
}
-/*
- * wxObjectData
- */
+wxObjectRefData *wxObject::CreateRefData() const
+{
+ // if you use AllocExclusive() you must override this method
+ wxFAIL_MSG( _T("CreateRefData() must be overridden if called!") );
+
+ return NULL;
+}
-wxObjectRefData::wxObjectRefData(void) : m_count(1)
+wxObjectRefData *
+wxObject::CloneRefData(const wxObjectRefData * WXUNUSED(data)) const
{
+ // if you use AllocExclusive() you must override this method
+ wxFAIL_MSG( _T("CloneRefData() must be overridden if called!") );
+
+ return NULL;
}
-wxObjectRefData::~wxObjectRefData(void)
+// ----------------------------------------------------------------------------
+// misc
+// ----------------------------------------------------------------------------
+
+#if defined(__DARWIN__) && defined(WXMAKINGDLL)
+
+extern "C" {
+ void __initialize_Cplusplus(void);
+ void wxWindowsDylibInit(void);
+};
+
+// Dynamic shared library (dylib) initialization routine
+// required to initialize static C++ objects bacause of lazy dynamic linking
+// http://developer.apple.com/techpubs/macosx/Essentials/
+// SystemOverview/Frameworks/Dynamic_Shared_Libraries.html
+
+void wxWindowsDylibInit()
{
+ // The function __initialize_Cplusplus() must be called from the shared
+ // library initialization routine to cause the static C++ objects in
+ // the library to be initialized (reference number 2441683).
+
+ // This only seems to be necessary if the library initialization routine
+ // needs to use the static C++ objects
+ __initialize_Cplusplus();
}
+#endif
+
+// vi:sts=4:sw=4:et
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