fixing bug 1841377

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

diff --git a/src/common/object.cpp b/src/common/object.cpp
index 01708a2a35b4e5ac6e91eb2e1ff0d93864498c1f..247c365f661f2009f3fabf33618bac61831c2601 100644 (file)
--- a/src/common/object.cpp
+++ b/src/common/object.cpp
@@ -10,28 +10,22 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "object.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #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>
 
-#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
-#include "wx/memory.h"
-#endif
-
 #if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
     #if defined(__VISAGECPP__)
         #define DEBUG_PRINTF(NAME) { static int raz=0; \
@@ -194,7 +188,7 @@ wxClassInfo::~wxClassInfo()
     Unregister();
 }
 
-wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
+wxClassInfo *wxClassInfo::FindClass(const wxString& className)
 {
     if ( sm_classTable )
     {
@@ -204,7 +198,7 @@ wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
     {
         for ( wxClassInfo *info = sm_first; info ; info = info->m_next )
         {
-            if ( wxStrcmp(info->GetClassName(), className) == 0 )
+            if ( className == info->GetClassName() )
                 return info;
         }
 
@@ -212,22 +206,31 @@ wxClassInfo *wxClassInfo::FindClass(const wxChar *className)
     }
 }
 
-void wxClassInfo::CleanUp()
-{
-    if ( sm_classTable )
-    {
-        delete sm_classTable;
-        sm_classTable = NULL;
-    }
-}
+// This function wasn't written to be reentrant but there is a possiblity of
+// reentrance if something it does causes a shared lib to load and register
+// classes. On Solaris this happens when the wxHashTable is newed, so the first
+// part of the function has been modified to handle it, and a wxASSERT checks
+// against reentrance in the remainder of the function.
 
 void wxClassInfo::Register()
 {
     if ( !sm_classTable )
     {
-        sm_classTable = new wxHashTable(wxKEY_STRING);
+        wxHashTable *classTable = new wxHashTable(wxKEY_STRING);
+
+        // check for reentrance
+        if ( sm_classTable )
+            delete classTable;
+        else
+            sm_classTable = classTable;
     }
 
+#ifdef __WXDEBUG__
+    // reentrance guard - see note above
+    static int entry = 0;
+    wxASSERT_MSG(++entry == 1, _T("wxClassInfo::Register() reentrance"));
+#endif
+
     // 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
@@ -242,6 +245,10 @@ void wxClassInfo::Register()
     );
 
     sm_classTable->Put(m_className, (wxObject *)this);
+
+#ifdef __WXDEBUG__
+    --entry;
+#endif
 }
 
 void wxClassInfo::Unregister()
@@ -257,7 +264,7 @@ void wxClassInfo::Unregister()
     }
 }
 
-wxObject *wxCreateDynamicObject(const wxChar *name)
+wxObject *wxCreateDynamicObject(const wxString& name)
 {
 #if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
     DEBUG_PRINTF(wxObject *wxCreateDynamicObject)
@@ -282,20 +289,53 @@ wxObject *wxCreateDynamicObject(const wxChar *name)
     }
 }
 
+// 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);
+}
 
 // ----------------------------------------------------------------------------
-// wxObject
+// wxObjectRefData
 // ----------------------------------------------------------------------------
 
-// Initialize ref data from another object (needed for copy constructor and
-// assignment operator)
-void wxObject::InitFrom(const wxObject& other)
+void wxObjectRefData::DecRef()
 {
-    m_refData = other.m_refData;
-    if ( m_refData )
-        m_refData->m_count++;
+    if ( --m_count == 0 )
+        delete this;
 }
 
+
+// ----------------------------------------------------------------------------
+// wxObject
+// ----------------------------------------------------------------------------
+
 void wxObject::Ref(const wxObject& clone)
 {
 #if defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT
@@ -313,7 +353,7 @@ void wxObject::Ref(const wxObject& clone)
     if ( clone.m_refData )
     {
         m_refData = clone.m_refData;
-        ++(m_refData->m_count);
+        m_refData->IncRef();
     }
 }
 
@@ -323,8 +363,7 @@ void wxObject::UnRef()
     {
         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;
     }
 }