X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c801d85f158c4cba50b588807daabdcbd0ed3853..e7e91e03584a8e2582e7efd32a06f9f79ef65a52:/src/common/object.cpp diff --git a/src/common/object.cpp b/src/common/object.cpp index 4dc8b093b3..776878d214 100644 --- a/src/common/object.cpp +++ b/src/common/object.cpp @@ -2,303 +2,341 @@ // Name: 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 +// Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// #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__ #pragma hdrstop #endif +#ifndef WX_PRECOMP #include "wx/hash.h" +#endif #include #include -#if (DEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT +#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT #include "wx/memory.h" #endif -#if DEBUG || USE_DEBUG_CONTEXT - // for wxObject::Dump - #include +#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT + // for wxObject::Dump +#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 !USE_SHARED_LIBRARY -wxClassInfo wxObject::classwxObject("wxObject", NULL, NULL, sizeof(wxObject), NULL); -wxClassInfo *wxClassInfo::first = NULL; #endif -/* - * wxWindows root object. - */ + +wxClassInfo wxObject::sm_classwxObject( wxT("wxObject"), 0, 0, + (int) sizeof(wxObject), + (wxObjectConstructorFn) 0 ); +wxClassInfo* wxClassInfo::sm_first = 0; +wxHashTable* wxClassInfo::sm_classTable = 0; -wxObject::wxObject(void) -{ - m_refData = NULL; -} + // These are here so we can avoid 'always true/false' warnings + // by referring to these instead of TRUE/FALSE -wxObject::~wxObject(void) -{ - UnRef(); -} +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 DEBUG || 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 << "unknown object class"; } #endif -#if DEBUG && USE_MEMORY_TRACING +#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING #ifdef new #undef new #endif -void * wxObject::operator new (size_t size, char * fileName, int lineNum) +void *wxObject::operator new (size_t size, wxChar *fileName, int lineNum) { - return wxDebugAlloc(size, fileName, lineNum, TRUE); + return wxDebugAlloc(size, fileName, lineNum, TRUE); } -void wxObject::operator delete (void * buf) +#ifndef __VISAGECPP__ +void wxObject::operator delete (void *buf) { - wxDebugFree(buf); + wxDebugFree(buf); } - -// Cause problems for VC++ - crashes -#ifndef _MSC_VER -void * wxObject::operator new[] (size_t size, char * fileName, int lineNum) +#elif __DEBUG_ALLOC__ +void wxObject::operator delete (void *buf, const char *_fname, size_t _line) { - return wxDebugAlloc(size, fileName, lineNum, TRUE, TRUE); + wxDebugFree(buf); } +#endif + + // VC++ 6.0 -void wxObject::operator delete[] (void * buf) +#if defined(__VISUALC__) && (__VISUALC__ >= 1200) +void wxObject::operator delete(void *pData, wxChar *WXUNUSED(fileName), int WXUNUSED(lineNum)) { - wxDebugFree(buf, TRUE); + ::operator delete(pData); } #endif -#endif - -/* - * Class info: provides run-time class type information. - */ + // Cause problems for VC++ - crashes -#ifdef USE_STORABLE_CLASSES - -wxClassInfo::wxClassInfo(char *cName, char *baseName1, char *baseName2, int sz, wxObjectConstructorFn fn, - wxStorableConstructorFn stoFn ) -{ - className = cName; - baseClassName1 = baseName1; - baseClassName2 = baseName2; - - objectSize = sz; - objectConstructor = fn; - storableConstructor = stoFn; - - next = first; - first = this; - - baseInfo1 = NULL; - baseInfo2 = NULL; -} - -wxObject* wxClassInfo::CreateObject( istream &stream, char *data ) +#if (!defined(__VISUALC__) && wxUSE_ARRAY_MEMORY_OPERATORS ) || defined(__MWERKS__) +void *wxObject::operator new[] (size_t size, wxChar *fileName, int lineNum) { - if (storableConstructor) - return (wxObject *)(*storableConstructor)( stream, data ); - else - return NULL; + return wxDebugAlloc(size, fileName, lineNum, TRUE, TRUE); } -#else - -wxClassInfo::wxClassInfo(char *cName, char *baseName1, char *baseName2, int sz, wxObjectConstructorFn constr) +void wxObject::operator delete[] (void *buf) { - className = cName; - baseClassName1 = baseName1; - baseClassName2 = baseName2; - - objectSize = sz; - objectConstructor = constr; - - next = first; - first = this; - - baseInfo1 = NULL; - baseInfo2 = NULL; + wxDebugFree(buf, TRUE); } - #endif -wxObject *wxClassInfo::CreateObject(void) -{ - if (objectConstructor) - return (wxObject *)(*objectConstructor)(); - else - return NULL; -} +#endif // __WXDEBUG__ && wxUSE_MEMORY_TRACING + + +// ---------------------------------------------------------------------------- +// wxClassInfo +// ---------------------------------------------------------------------------- -wxClassInfo *wxClassInfo::FindClass(char *c) +wxClassInfo *wxClassInfo::FindClass(const wxChar *className) { - wxClassInfo *p = first; - while (p) - { - if (p && p->GetClassName() && strcmp(p->GetClassName(), c) == 0) - return p; - p = p->next; - } - return NULL; + 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; + } } -// Climb upwards through inheritance hierarchy. -// Dual inheritance is catered for. -bool wxClassInfo::IsKindOf(wxClassInfo *info) +// a tiny InitializeClasses() helper +/* static */ +inline wxClassInfo *wxClassInfo::GetBaseByName(const wxChar *name) { - 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; -#endif + if ( !name ) + return NULL; - if (baseInfo1) - if (baseInfo1->IsKindOf(info)) - return TRUE; + wxClassInfo *classInfo = (wxClassInfo *)sm_classTable->Get(name); - if (baseInfo2) - return baseInfo2->IsKindOf(info); + // 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 FALSE; + return classInfo; } // Set pointers to base class(es) to speed up IsKindOf -void wxClassInfo::InitializeClasses(void) +void wxClassInfo::InitializeClasses() { - 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; - } + // 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 + + wxClassInfo::sm_classTable = new wxHashTable(wxKEY_STRING); + + // Index all class infos by their class name + + 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); + } + } + + // Set base pointers for each wxClassInfo + + for(info = sm_first; info; info = info->m_next) + { + info->m_baseInfo1 = GetBaseByName(info->GetBaseClassName1()); + info->m_baseInfo2 = GetBaseByName(info->GetBaseClassName2()); + } } -wxObject *wxCreateDynamicObject(char *name) +void wxClassInfo::CleanUpClasses() { - wxClassInfo *info = wxClassInfo::first; - while (info) - { - if (info->className && strcmp(info->className, name) == 0) - return info->CreateObject(); - info = info->next; - } - return NULL; + delete wxClassInfo::sm_classTable; + wxClassInfo::sm_classTable = 0; } -#ifdef USE_STORABLE_CLASSES -wxObject* wxCreateStoredObject( char *name, istream &stream, char *data ) +wxObject *wxCreateDynamicObject(const wxChar *name) { - wxClassInfo *info = wxClassInfo::first; - while (info) - { - if (info->className && strcmp(info->className, name) == 0) - return info->CreateObject( stream, data ); - info = info->next; - } - return NULL; -}; - +#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT + DEBUG_PRINTF(wxObject *wxCreateDynamicObject) #endif -/* - * wxObject: cloning of objects - */ + if (wxClassInfo::sm_classTable) + { + wxClassInfo *info = (wxClassInfo *)wxClassInfo::sm_classTable->Get(name); + return info != 0 ? info->CreateObject() : 0; + } + else + { + 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; + } +} + + +// ---------------------------------------------------------------------------- +// wxClassInfo +// ---------------------------------------------------------------------------- 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; } - m_refData = NULL; } -/* - * wxObjectData - */ +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 -wxObjectRefData::wxObjectRefData(void) : m_count(1) + 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::~wxObjectRefData(void) +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) + +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). + + __initialize_Cplusplus(); +} + +#endif + +// vi:sts=4:sw=4:et