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dolphin/Externals/wxWidgets3/src/common/object.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: src/common/object.cpp
// Purpose: wxObject implementation
// Author: Julian Smart
// Modified by: Ron Lee
// Created: 04/01/98
// Copyright: (c) 1998 Julian Smart
// (c) 2001 Ron Lee <ron@debian.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/object.h"
#include "wx/hash.h"
#include "wx/memory.h"
#include "wx/crt.h"
#endif
#include <string.h>
#if wxUSE_DEBUG_CONTEXT
#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 // wxUSE_DEBUG_CONTEXT
// we must disable optimizations for VC.NET because otherwise its too eager
// linker discards wxClassInfo objects in release build thus breaking many,
// many things
#if defined __VISUALC__ && __VISUALC__ >= 1300
#pragma optimize("", off)
#endif
#if wxUSE_EXTENDED_RTTI
const wxClassInfo* wxObject::ms_classParents[] = { NULL } ;
wxObject* wxVariantOfPtrToObjectConverterwxObject ( const wxAny &data )
{ return wxANY_AS(data, wxObject*); }
wxAny wxObjectToVariantConverterwxObject ( wxObject *data )
{ return wxAny( dynamic_cast<wxObject*> (data) ) ; }
wxClassInfo wxObject::ms_classInfo(ms_classParents , wxEmptyString , wxT("wxObject"),
(int) sizeof(wxObject), \
(wxObjectConstructorFn) 0 ,
NULL,NULL,0 , 0 ,
0 , wxVariantOfPtrToObjectConverterwxObject , 0 , wxObjectToVariantConverterwxObject);
template<> void wxStringWriteValue(wxString & , wxObject* const & ){ wxFAIL_MSG("unreachable"); }
template<> void wxStringWriteValue(wxString & , wxObject const & ){ wxFAIL_MSG("unreachable"); }
wxClassTypeInfo s_typeInfo(wxT_OBJECT_PTR , &wxObject::ms_classInfo , NULL , NULL , typeid(wxObject*).name() ) ;
wxClassTypeInfo s_typeInfowxObject(wxT_OBJECT , &wxObject::ms_classInfo , NULL , NULL , typeid(wxObject).name() ) ;
#else
wxClassInfo wxObject::ms_classInfo( wxT("wxObject"), 0, 0,
(int) sizeof(wxObject),
(wxObjectConstructorFn) 0 );
#endif
// restore optimizations
#if defined __VISUALC__ && __VISUALC__ >= 1300
#pragma optimize("", on)
#endif
wxClassInfo* wxClassInfo::sm_first = NULL;
wxHashTable* wxClassInfo::sm_classTable = NULL;
// when using XTI, this method is already implemented inline inside
// DECLARE_DYNAMIC_CLASS but otherwise we intentionally make this function
// non-inline because this allows us to have a non-inline virtual function in
// all wx classes and this solves linking problems for HP-UX native toolchain
// and possibly others (we could make dtor non-inline as well but it's more
// useful to keep it inline than this function)
#if !wxUSE_EXTENDED_RTTI
wxClassInfo *wxObject::GetClassInfo() const
{
return &wxObject::ms_classInfo;
}
#endif // wxUSE_EXTENDED_RTTI
// this variable exists only so that we can avoid 'always true/false' warnings
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(const wxClassInfo *info) const
{
const wxClassInfo *thisInfo = GetClassInfo();
return (thisInfo) ? thisInfo->IsKindOf(info) : false ;
}
#if wxUSE_MEMORY_TRACING && defined( new )
#undef new
#endif
#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
void *wxObject::operator new ( size_t size, const wxChar *fileName, int lineNum )
{
return wxDebugAlloc(size, (wxChar*) fileName, lineNum, true);
}
#endif
#ifdef _WX_WANT_DELETE_VOID
void wxObject::operator delete ( void *buf )
{
wxDebugFree(buf);
}
#endif
#ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
void wxObject::operator delete ( void *buf, const char *_fname, size_t _line )
{
wxDebugFree(buf);
}
#endif
#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
void wxObject::operator delete ( void *buf, const wxChar *WXUNUSED(fileName), int WXUNUSED(lineNum) )
{
wxDebugFree(buf);
}
#endif
#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
void *wxObject::operator new[] ( size_t size, const wxChar* fileName, int lineNum )
{
return wxDebugAlloc(size, (wxChar*) fileName, lineNum, true, true);
}
#endif
#ifdef _WX_WANT_ARRAY_DELETE_VOID
void wxObject::operator delete[] ( void *buf )
{
wxDebugFree(buf, true);
}
#endif
#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;
}
}
Unregister();
}
wxClassInfo *wxClassInfo::FindClass(const wxString& className)
{
if ( sm_classTable )
{
return (wxClassInfo *)wxClassInfo::sm_classTable->Get(className);
}
else
{
for ( wxClassInfo *info = sm_first; info ; info = info->m_next )
{
if ( className == info->GetClassName() )
return info;
}
return NULL;
}
}
// Reentrance can occur on some platforms (Solaris for one), as the use of hash
// and string objects can cause other modules to load and register classes
// before the original call returns. This is handled by keeping the hash table
// local when it is first created and only assigning it to the global variable
// when the function is ready to return.
//
// That does make the assumption that after the function has completed the
// first time the problem will no longer happen; all the modules it depends on
// will have been loaded. The assumption is checked using the 'entry' variable
// as a reentrance guard, it checks that once the hash table is global it is
// not accessed multiple times simulateously.
void wxClassInfo::Register()
{
#if wxDEBUG_LEVEL
// reentrance guard - see note above
static int entry = 0;
#endif // wxDEBUG_LEVEL
wxHashTable *classTable;
if ( !sm_classTable )
{
// keep the hash local initially, reentrance is possible
classTable = new wxHashTable(wxKEY_STRING);
}
else
{
// guard againt reentrance once the global has been created
wxASSERT_MSG(++entry == 1, wxT("wxClassInfo::Register() reentrance"));
classTable = sm_classTable;
}
// Using IMPLEMENT_DYNAMIC_CLASS() macro twice (which may happen if you
// link any object module twice mistakenly, or link twice against wx shared
// library) 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.
wxASSERT_MSG( classTable->Get(m_className) == NULL,
wxString::Format
(
wxT("Class \"%s\" already in RTTI table - have you used IMPLEMENT_DYNAMIC_CLASS() multiple times or linked some object file twice)?"),
m_className
)
);
classTable->Put(m_className, (wxObject *)this);
// if we're using a local hash we need to try to make it global
if ( sm_classTable != classTable )
{
if ( !sm_classTable )
{
// make the hash global
sm_classTable = classTable;
}
else
{
// the gobal hash has already been created by a reentrant call,
// so delete the local hash and try again
delete classTable;
Register();
}
}
#if wxDEBUG_LEVEL
entry = 0;
#endif // wxDEBUG_LEVEL
}
void wxClassInfo::Unregister()
{
if ( sm_classTable )
{
sm_classTable->Delete(m_className);
if ( sm_classTable->GetCount() == 0 )
{
wxDELETE(sm_classTable);
}
}
}
wxObject *wxCreateDynamicObject(const wxString& name)
{
#if wxUSE_DEBUG_CONTEXT
DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
#endif
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;
}
}
// iterator interface
wxClassInfo::const_iterator::value_type
wxClassInfo::const_iterator::operator*() const
{
return (wxClassInfo*)m_node->GetData();
}
wxClassInfo::const_iterator& wxClassInfo::const_iterator::operator++()
{
m_node = m_table->Next();
return *this;
}
const wxClassInfo::const_iterator wxClassInfo::const_iterator::operator++(int)
{
wxClassInfo::const_iterator tmp = *this;
m_node = m_table->Next();
return tmp;
}
wxClassInfo::const_iterator wxClassInfo::begin_classinfo()
{
sm_classTable->BeginFind();
return const_iterator(sm_classTable->Next(), sm_classTable);
}
wxClassInfo::const_iterator wxClassInfo::end_classinfo()
{
return const_iterator(NULL, NULL);
}
// ----------------------------------------------------------------------------
// wxObjectRefData
// ----------------------------------------------------------------------------
void wxRefCounter::DecRef()
{
wxASSERT_MSG( m_count > 0, "invalid ref data count" );
if ( --m_count == 0 )
delete this;
}
// ----------------------------------------------------------------------------
// wxObject
// ----------------------------------------------------------------------------
void wxObject::Ref(const wxObject& clone)
{
#if 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 )
{
m_refData = clone.m_refData;
m_refData->IncRef();
}
}
void wxObject::UnRef()
{
if ( m_refData )
{
m_refData->DecRef();
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,
wxT("wxObject::AllocExclusive() failed.") );
}
wxObjectRefData *wxObject::CreateRefData() const
{
// if you use AllocExclusive() you must override this method
wxFAIL_MSG( wxT("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( wxT("CloneRefData() must be overridden if called!") );
return NULL;
}
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