/////////////////////////////////////////////////////////////////////////////
-// Name: object.cpp
+// Name: src/common/object.cpp
// Purpose: wxObject implementation
// Author: Julian Smart
// Modified by: Ron Lee
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) 1998 Julian Smart and Markus Holzem
+// Copyright: (c) 1998 Julian Smart
// (c) 2001 Ron Lee <ron@debian.org>
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "object.h"
#endif
- // For compilers that support precompilation, includes "wx.h".
-
+// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#endif
#include <string.h>
-#include <assert.h>
#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
#include "wx/memory.h"
#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
// for wxObject::Dump
-#include "wx/ioswrap.h"
+ #include "wx/ioswrap.h"
-#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
+ #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
-#endif
-
wxClassInfo wxObject::sm_classwxObject( wxT("wxObject"), 0, 0,
(int) sizeof(wxObject),
(wxObjectConstructorFn) 0 );
-wxClassInfo* wxClassInfo::sm_first = 0;
-wxHashTable* wxClassInfo::sm_classTable = 0;
- // These are here so we can avoid 'always true/false' warnings
- // by referring to these instead of TRUE/FALSE
+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.
-
+// 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 (GetClassInfo() && GetClassInfo()->GetClassName())
str << GetClassInfo()->GetClassName();
else
- str << "unknown object class";
+ str << _T("unknown object class");
}
#endif
-#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
-#ifdef new
-#undef new
+#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING && defined( new )
+ #undef new
#endif
-void *wxObject::operator new (size_t size, wxChar *fileName, int lineNum)
+
+#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
+void *wxObject::operator new ( size_t size, const wxChar *fileName, int lineNum )
{
- return wxDebugAlloc(size, fileName, lineNum, TRUE);
+ return wxDebugAlloc(size, (wxChar*) fileName, lineNum, TRUE);
}
+#endif
-#ifndef __VISAGECPP__
-void wxObject::operator delete (void *buf)
+#ifdef _WX_WANT_DELETE_VOID
+void wxObject::operator delete ( void *buf )
{
wxDebugFree(buf);
}
-#elif __DEBUG_ALLOC__
-void wxObject::operator delete (void *buf, const char *_fname, size_t _line)
+#endif
+
+#ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
+void wxObject::operator delete ( void *buf, const char *_fname, size_t _line )
{
wxDebugFree(buf);
}
#endif
- // VC++ 6.0
-
-#if defined(__VISUALC__) && (__VISUALC__ >= 1200)
-void wxObject::operator delete(void *pData, wxChar *WXUNUSED(fileName), int WXUNUSED(lineNum))
+#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
+void wxObject::operator delete ( void *buf, const wxChar *WXUNUSED(fileName), int WXUNUSED(lineNum) )
{
- ::operator delete(pData);
+ wxDebugFree(buf);
}
#endif
- // Cause problems for VC++ - crashes
-
-#if (!defined(__VISUALC__) && wxUSE_ARRAY_MEMORY_OPERATORS ) || defined(__MWERKS__)
-void *wxObject::operator new[] (size_t size, wxChar *fileName, int lineNum)
+#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
+void *wxObject::operator new[] ( size_t size, const wxChar* fileName, int lineNum )
{
- return wxDebugAlloc(size, fileName, lineNum, TRUE, TRUE);
+ return wxDebugAlloc(size, (wxChar*) fileName, lineNum, TRUE, TRUE);
}
+#endif
-void wxObject::operator delete[] (void *buf)
+#ifdef _WX_WANT_ARRAY_DELETE_VOID
+void wxObject::operator delete[] ( void *buf )
{
wxDebugFree(buf, TRUE);
}
#endif
-#endif // __WXDEBUG__ && wxUSE_MEMORY_TRACING
+#ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
+void wxObject::operator delete[] (void * buf, const wxChar* WXUNUSED(fileName), int WXUNUSED(lineNum) )
+{
+ wxDebugFree(buf, TRUE);
+}
+#endif
// ----------------------------------------------------------------------------
// wxClassInfo
// ----------------------------------------------------------------------------
+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;
+ }
+ }
+}
+
wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
{
if ( sm_classTable )
}
}
- // Set pointers to base class(es) to speed up IsKindOf
+// a tiny InitializeClasses() helper
+/* static */
+inline wxClassInfo *wxClassInfo::GetBaseByName(const wxChar *name)
+{
+ if ( !name )
+ return NULL;
+ wxClassInfo *classInfo = (wxClassInfo *)sm_classTable->Get(name);
+
+ // 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
+ ) );
+
+ return classInfo;
+}
+
+// Set pointers to base class(es) to speed up IsKindOf
void wxClassInfo::InitializeClasses()
{
// using IMPLEMENT_DYNAMIC_CLASS() macro twice (which may happen if you
size_t nClass = 0;
#endif
- wxClassInfo::sm_classTable = new wxHashTable(wxKEY_STRING);
+ sm_classTable = new wxHashTable(wxKEY_STRING);
// Index all class infos by their class name
for(info = sm_first; info; info = info->m_next)
{
- if (info->GetBaseClassName1())
- info->m_baseInfo1 = (wxClassInfo *)sm_classTable->Get(info->GetBaseClassName1());
- if (info->GetBaseClassName2())
- info->m_baseInfo2 = (wxClassInfo *)sm_classTable->Get(info->GetBaseClassName2());
+ info->m_baseInfo1 = GetBaseByName(info->GetBaseClassName1());
+ info->m_baseInfo2 = GetBaseByName(info->GetBaseClassName2());
}
}
void wxClassInfo::CleanUpClasses()
{
delete wxClassInfo::sm_classTable;
- wxClassInfo::sm_classTable = 0;
+ wxClassInfo::sm_classTable = NULL;
}
wxObject *wxCreateDynamicObject(const wxChar *name)
{
#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
- DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
+ DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
#endif
- if (wxClassInfo::sm_classTable)
+ if ( wxClassInfo::sm_classTable )
{
wxClassInfo *info = (wxClassInfo *)wxClassInfo::sm_classTable->Get(name);
- return info != 0 ? info->CreateObject() : 0;
+ return info ? info->CreateObject() : NULL;
}
- else
+ else // no sm_classTable yet
{
- for(wxClassInfo *info = wxClassInfo::sm_first; info; info = info->m_next)
+ 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 0;
+ }
+
+ return NULL;
}
}
// ----------------------------------------------------------------------------
-// wxClassInfo
+// 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)
+ 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()
{
- if( m_refData )
+ 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 = 0;
+ m_refData = NULL;
+ }
+}
+
+void wxObject::AllocExclusive()
+{
+ if ( !m_refData )
+ {
+ m_refData = CreateRefData();
+ }
+ 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.") );
}
+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 *
+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;
+}
+
+// ----------------------------------------------------------------------------
+// misc
+// ----------------------------------------------------------------------------
-#if defined(__DARWIN__) && defined(DYLIB_INIT)
+#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
+// 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()
{
// 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();
}
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