Use the data scheme to load resources in the WebKitGTK+ implementation, rather than...

[wxWidgets.git] / src / common / object.cpp

diff --git a/src/common/object.cpp b/src/common/object.cpp
index 776878d214a7f1440480b3c8596fdd29996d5333..fbcd2766b56f2564c504ccac73fbeb960023c0e8 100644 (file)
--- a/src/common/object.cpp
+++ b/src/common/object.cpp
@@ -1,139 +1,193 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        object.cpp
+// Name:        src/common/object.cpp

 // Purpose:     wxObject implementation
 // Author:      Julian Smart
 // Modified by: Ron Lee
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // 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>
 //              (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__
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

-#include "wx/hash.h"
+    #include "wx/object.h"
+    #include "wx/hash.h"
+    #include "wx/memory.h"
+    #include "wx/crt.h"

 #endif
 
 #include <string.h>
 #endif
 
 #include <string.h>

-#include <assert.h>

 
 

-#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
-#include "wx/memory.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
 
 #endif
 

-#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
-    // for wxObject::Dump
-#include "wx/ioswrap.h"
+#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)  ) ; }

 
 

-#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
+ wxClassInfo wxObject::ms_classInfo(ms_classParents , wxEmptyString , wxT("wxObject"),
+            (int) sizeof(wxObject),                              \
+            (wxObjectConstructorFn) 0   ,
+            NULL,NULL,0 , 0 ,
+            0 , wxVariantOfPtrToObjectConverterwxObject , 0 , wxObjectToVariantConverterwxObject);

 
 

-#endif
+ template<> void wxStringWriteValue(wxString & , wxObject* const & ){ wxFAIL_MSG("unreachable"); }
+ template<> void wxStringWriteValue(wxString & , wxObject const & ){ wxFAIL_MSG("unreachable"); }

 
 

- 
-wxClassInfo wxObject::sm_classwxObject( wxT("wxObject"), 0, 0,
+ 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 );
                                         (int) sizeof(wxObject),
                                         (wxObjectConstructorFn) 0 );

-wxClassInfo* wxClassInfo::sm_first = 0;
-wxHashTable* wxClassInfo::sm_classTable = 0;
+#endif

 
 

-    // These are here so we can avoid 'always true/false' warnings
-    // by referring to these instead of TRUE/FALSE
+// restore optimizations
+#if defined __VISUALC__ && __VISUALC__ >= 1300
+    #pragma optimize("", on)
+#endif

 
 

-const bool wxTrue = TRUE;
-const bool wxFalse = FALSE;
+wxClassInfo* wxClassInfo::sm_first = NULL;
+wxHashTable* wxClassInfo::sm_classTable = NULL;

 
 

-    // 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.
+// 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

 
 

-bool wxObject::IsKindOf(wxClassInfo *info) const
+wxClassInfo *wxObject::GetClassInfo() const

 {
 {

-    wxClassInfo *thisInfo = GetClassInfo();
-    return (thisInfo) ? thisInfo->IsKindOf(info) : FALSE ;
+    return &wxObject::ms_classInfo;

 }
 
 }
 

-#if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT)
-void wxObject::Dump(wxSTD ostream& str)
+#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

 {
 {

-    if (GetClassInfo() && GetClassInfo()->GetClassName())
-        str << GetClassInfo()->GetClassName();
-    else
-        str << "unknown object class";
+    const wxClassInfo *thisInfo = GetClassInfo();
+    return (thisInfo) ? thisInfo->IsKindOf(info) : false ;

 }
 }

-#endif

 
 

-#if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
-
-#ifdef new
-#undef new
+#if wxUSE_MEMORY_TRACING && defined( new )
+    #undef new

 #endif
 
 #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);
 }
 {
     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
 
 {
     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
 
 }
 #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);
+    wxDebugFree(buf, true);

 }
 #endif
 
 }
 #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 *wxClassInfo::FindClass(const wxChar *className)
+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 )
     {
 {
     if ( sm_classTable )
     {


@@ -143,7 +197,7 @@ wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
     {
         for ( wxClassInfo *info = sm_first; info ; info = info->m_next )
         {
     {
         for ( wxClassInfo *info = sm_first; info ; info = info->m_next )
         {

-            if ( wxStrcmp(info->GetClassName(), className) == 0 )
+            if ( className == info->GetClassName() )

                 return info;
         }
 
                 return info;
         }
 


@@ -151,99 +205,165 @@ wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
     }
 }
 
     }
 }
 

-// a tiny InitializeClasses() helper
-/* static */
-inline wxClassInfo *wxClassInfo::GetBaseByName(const wxChar *name)
+// 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 ( !name )
-        return NULL;
+#if wxDEBUG_LEVEL
+    // reentrance guard - see note above
+    static int entry = 0;
+#endif // wxDEBUG_LEVEL

 
 

-    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;
-}
+    wxHashTable *classTable;

 
 

-// Set pointers to base class(es) to speed up IsKindOf
-void wxClassInfo::InitializeClasses()
-{
-    // 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
+    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;
+    }

 
 

-    wxClassInfo *info;
-    for(info = sm_first; info; info = info->m_next)
+    // 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 (info->m_className)
+        if ( !sm_classTable )

         {
         {

-            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);
+            // 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();

         }
     }
 
         }
     }
 

-        // 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());
-    }
+#if wxDEBUG_LEVEL
+    entry = 0;
+#endif // wxDEBUG_LEVEL

 }
 
 }
 

-void wxClassInfo::CleanUpClasses()
+void wxClassInfo::Unregister()

 {
 {

-    delete wxClassInfo::sm_classTable;
-    wxClassInfo::sm_classTable = 0;
+    if ( sm_classTable )
+    {
+        sm_classTable->Delete(m_className);
+        if ( sm_classTable->GetCount() == 0 )
+        {
+            wxDELETE(sm_classTable);
+        }
+    }

 }
 
 }
 

-
-wxObject *wxCreateDynamicObject(const wxChar *name)
+wxObject *wxCreateDynamicObject(const wxString& name)

 {
 {

-#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
- DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
+#if wxUSE_DEBUG_CONTEXT
+    DEBUG_PRINTF(wxObject *wxCreateDynamicObject)

 #endif
 
 #endif
 

-    if (wxClassInfo::sm_classTable)
+    if ( wxClassInfo::sm_classTable )

     {
         wxClassInfo *info = (wxClassInfo *)wxClassInfo::sm_classTable->Get(name);
     {
         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();
             if (info->m_className && wxStrcmp(info->m_className, name) == 0)
                 return info->CreateObject();

-        return 0;
+        }
+
+        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);
+}

 
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------

-// wxClassInfo
+// 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)
 {
 // ----------------------------------------------------------------------------
 
 void wxObject::Ref(const wxObject& clone)
 {

-#if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
+#if wxUSE_DEBUG_CONTEXT

     DEBUG_PRINTF(wxObject::Ref)
 #endif
 
     DEBUG_PRINTF(wxObject::Ref)
 #endif
 


@@ -258,7 +378,7 @@ void wxObject::Ref(const wxObject& clone)
     if ( clone.m_refData )
     {
         m_refData = clone.m_refData;
     if ( clone.m_refData )
     {
         m_refData = clone.m_refData;

-        ++(m_refData->m_count);
+        m_refData->IncRef();

     }
 }
 
     }
 }
 


@@ -266,10 +386,7 @@ 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->DecRef();

         m_refData = NULL;
     }
 }
         m_refData = NULL;
     }
 }


@@ -292,13 +409,13 @@ void wxObject::AllocExclusive()
     //else: ref count is 1, we are exclusive owners of m_refData anyhow
 
     wxASSERT_MSG( m_refData && m_refData->GetRefCount() == 1,
     //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.") );
+                  wxT("wxObject::AllocExclusive() failed.") );

 }
 
 wxObjectRefData *wxObject::CreateRefData() const
 {
     // if you use AllocExclusive() you must override this method
 }
 
 wxObjectRefData *wxObject::CreateRefData() const
 {
     // if you use AllocExclusive() you must override this method

-    wxFAIL_MSG( _T("CreateRefData() must be overridden if called!") );
+    wxFAIL_MSG( wxT("CreateRefData() must be overridden if called!") );

 
     return NULL;
 }
 
     return NULL;
 }


@@ -307,36 +424,7 @@ wxObjectRefData *
 wxObject::CloneRefData(const wxObjectRefData * WXUNUSED(data)) const
 {
     // if you use AllocExclusive() you must override this method
 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!") );
+    wxFAIL_MSG( wxT("CloneRefData() must be overridden if called!") );

 
     return NULL;
 }
 
     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