X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8ebec7dcd8b0b7294dbc86340d52a10b45bc80db..d863389f773348f5b6e06243050d4379d66de05d:/src/common/event.cpp

diff --git a/src/common/event.cpp b/src/common/event.cpp
index dc121dee42..9e8fbdf508 100644
--- a/src/common/event.cpp
+++ b/src/common/event.cpp
@@ -45,6 +45,13 @@
 
 #include "wx/thread.h"
 
+#if wxUSE_BASE
+    #include "wx/ptr_scpd.h"
+
+    wxDECLARE_SCOPED_PTR(wxEvent, wxEventPtr)
+    wxDEFINE_SCOPED_PTR(wxEvent, wxEventPtr)
+#endif // wxUSE_BASE
+
 // ----------------------------------------------------------------------------
 // wxWin macros
 // ----------------------------------------------------------------------------
@@ -176,6 +183,7 @@ DEFINE_EVENT_TYPE(wxEVT_COMMAND_COMBOBOX_SELECTED)
 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TOOL_RCLICKED)
 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TOOL_ENTER)
 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPINCTRL_UPDATED)
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPINCTRLDOUBLE_UPDATED)
 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TOOL_DROPDOWN_CLICKED)
 
 // Mouse event types
@@ -406,13 +414,15 @@ wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId)
 
 wxString wxCommandEvent::GetString() const
 {
-    if(m_eventType != wxEVT_COMMAND_TEXT_UPDATED || !m_eventObject)
+    if (m_eventType != wxEVT_COMMAND_TEXT_UPDATED || !m_eventObject)
+    {
         return m_cmdString;
+    }
     else
     {
 #if wxUSE_TEXTCTRL
         wxTextCtrl *txt = wxDynamicCast(m_eventObject, wxTextCtrl);
-        if(txt)
+        if ( txt )
             return txt->GetValue();
         else
 #endif // wxUSE_TEXTCTRL
@@ -1012,7 +1022,6 @@ void wxEventHashTable::GrowEventTypeTable()
     delete[] oldEventTypeTable;
 }
 
-
 // ----------------------------------------------------------------------------
 // wxEvtHandler
 // ----------------------------------------------------------------------------
@@ -1023,6 +1032,8 @@ void wxEventHashTable::GrowEventTypeTable()
 
 wxEvtHandler::wxEvtHandler()
 {
+    m_beingDeleted = false;
+    
     m_nextHandler = (wxEvtHandler *) NULL;
     m_previousHandler = (wxEvtHandler *) NULL;
     m_enabled = true;
@@ -1036,6 +1047,8 @@ wxEvtHandler::wxEvtHandler()
 
 wxEvtHandler::~wxEvtHandler()
 {
+    m_beingDeleted = true;
+    
     // Takes itself out of the list of handlers
     if (m_previousHandler)
         m_previousHandler->m_nextHandler = m_nextHandler;
@@ -1052,6 +1065,19 @@ wxEvtHandler::~wxEvtHandler()
         {
             wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)*it;
 
+            // Remove ourselves from sink destructor notifications
+            wxEvtHandler *eventSink = entry->m_eventSink;
+            if ( eventSink )
+            {
+                wxEventConnectionRef * const
+                    evtConnRef = FindRefInTrackerList(eventSink);
+                if ( evtConnRef )
+                {
+                    eventSink->RemoveNode(evtConnRef);
+                    delete evtConnRef;
+                }
+            }
+
             if (entry->m_callbackUserData)
                 delete entry->m_callbackUserData;
             delete entry;
@@ -1060,14 +1086,25 @@ wxEvtHandler::~wxEvtHandler()
     };
 
     if (m_pendingEvents)
+    {
+        // At this time, we could still be used from other threads. 
+        // Continue to use sync objects.
+        wxENTER_CRIT_SECT( m_pendingEventsLock );
+        
         m_pendingEvents->DeleteContents(true);
-    delete m_pendingEvents;
+        delete m_pendingEvents;
+        m_pendingEvents = NULL;
+        
+        wxLEAVE_CRIT_SECT( m_pendingEventsLock );
+    }
 
     // Remove us from wxPendingEvents if necessary.
     if ( wxPendingEvents )
     {
-        if(wxPendingEventsLocker)
+#if wxUSE_THREADS
+        if (wxPendingEventsLocker)
             wxENTER_CRIT_SECT(*wxPendingEventsLocker);
+#endif
 
         if ( wxPendingEvents->DeleteObject(this) )
         {
@@ -1077,8 +1114,10 @@ wxEvtHandler::~wxEvtHandler()
         }
         //else: we weren't in this list at all, it's ok
 
-        if(wxPendingEventsLocker)
+#if wxUSE_THREADS
+        if (wxPendingEventsLocker)
             wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
+#endif
     }
 
     // we only delete object data, not untyped
@@ -1101,23 +1140,20 @@ bool wxEvtHandler::ProcessThreadEvent(const wxEvent& event)
 
 #endif // wxUSE_THREADS
 
-void wxEvtHandler::AddPendingEvent(const wxEvent& event)
+void wxEvtHandler::QueueEvent(wxEvent *event)
 {
-    // 1) Add event to list of pending events of this event handler
+    wxCHECK_RET( event, "NULL event can't be posted" );
 
-    wxEvent *eventCopy = event.Clone();
-
-    // we must be able to copy the events here so the event class must
-    // implement Clone() properly instead of just providing a NULL stab for it
-    wxCHECK_RET( eventCopy,
-                 _T("events of this type aren't supposed to be posted") );
+    // Catch the situation where destructor is already invoked (in another thread)
+    if( m_beingDeleted ) return;
 
+    // 1) Add this event to our list of pending events
     wxENTER_CRIT_SECT( m_pendingEventsLock );
 
     if ( !m_pendingEvents )
       m_pendingEvents = new wxList;
 
-    m_pendingEvents->Append(eventCopy);
+    m_pendingEvents->Append(event);
 
     wxLEAVE_CRIT_SECT( m_pendingEventsLock );
 
@@ -1142,13 +1178,24 @@ void wxEvtHandler::ProcessPendingEvents()
 {
     wxENTER_CRIT_SECT( m_pendingEventsLock );
 
-    // this method is only called by wxApp if this handler does have
-    // pending events
-    wxCHECK_RET( m_pendingEvents && !m_pendingEvents->IsEmpty(),
-                 "should have pending events if called" );
+    // This method is only called by wxApp if this handler does have
+    // pending events, but it happens occasionally when using multi-
+    // threading and we don't want a crash due to that.
+    if( !m_pendingEvents  )
+    {
+        wxLEAVE_CRIT_SECT( m_pendingEventsLock );
+        return;
+    }
+    
+    if( m_pendingEvents->IsEmpty() )
+    {
+        wxPendingEvents->DeleteObject(this);
+        wxLEAVE_CRIT_SECT( m_pendingEventsLock );
+        return;
+    }
 
     wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
-    wxEvent * const event = wx_static_cast(wxEvent *, node->GetData());
+    wxEventPtr event(wx_static_cast(wxEvent *, node->GetData()));
 
     // it's important we remove event from list before processing it, else a
     // nested event loop, for example from a modal dialog, might process the
@@ -1158,7 +1205,17 @@ void wxEvtHandler::ProcessPendingEvents()
     // if there are no more pending events left, we don't need to stay in this
     // list
     if ( m_pendingEvents->IsEmpty() )
+    {
+#if wxUSE_THREADS
+        if (wxPendingEventsLocker)
+            wxENTER_CRIT_SECT(*wxPendingEventsLocker);
+#endif
         wxPendingEvents->DeleteObject(this);
+#if wxUSE_THREADS
+        if (wxPendingEventsLocker)
+            wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
+#endif
+    }
 
     wxLEAVE_CRIT_SECT( m_pendingEventsLock );
 
@@ -1167,8 +1224,6 @@ void wxEvtHandler::ProcessPendingEvents()
     // careful: this object could have been deleted by the event handler
     // executed by the above ProcessEvent() call, so we can't access any fields
     // of this object any more
-
-    delete event;
 }
 
 /*
@@ -1347,6 +1402,16 @@ void wxEvtHandler::Connect( int id, int lastId,
 
     // Insert at the front of the list so most recent additions are found first
     m_dynamicEvents->Insert( (wxObject*) entry );
+
+    // Make sure we get to know when a sink is destroyed
+    if ( eventSink && eventSink != this )
+    {
+        wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
+        if ( evtConnRef )
+            evtConnRef->IncRef( );
+        else
+            evtConnRef = new wxEventConnectionRef(this, eventSink);
+    }
 }
 
 bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
@@ -1357,6 +1422,14 @@ bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
     if (!m_dynamicEvents)
         return false;
 
+    // Remove connection from tracker node (wxEventConnectionRef)
+    if ( eventSink && eventSink != this )
+    {
+        wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
+        if ( evtConnRef )
+            evtConnRef->DecRef();
+    }
+
     wxList::compatibility_iterator node = m_dynamicEvents->GetFirst();
     while (node)
     {
@@ -1447,6 +1520,46 @@ void *wxEvtHandler::DoGetClientData() const
     return m_clientData;
 }
 
+// A helper to find an wxEventConnectionRef object
+wxEventConnectionRef *
+wxEvtHandler::FindRefInTrackerList(wxEvtHandler *eventSink)
+{
+    for ( wxTrackerNode *node = eventSink->GetFirst(); node; node = node->m_nxt )
+    {
+        // we only want wxEventConnectionRef nodes here
+        wxEventConnectionRef *evtConnRef = node->ToEventConnection();
+        if ( evtConnRef && evtConnRef->m_src == this )
+        {
+            wxASSERT( evtConnRef->m_sink==eventSink );
+            return evtConnRef;
+        }
+    }
+
+    return NULL;
+}
+
+void wxEvtHandler::OnSinkDestroyed( wxEvtHandler *sink )
+{
+    wxASSERT(m_dynamicEvents);
+
+    // remove all connections with this sink
+    wxList::compatibility_iterator node = m_dynamicEvents->GetFirst(), node_nxt;
+    while (node)
+    {
+        wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
+        node_nxt = node->GetNext();
+
+        if ( entry->m_eventSink==sink )
+        {
+            if (entry->m_callbackUserData)
+                delete entry->m_callbackUserData;
+            m_dynamicEvents->Erase( node );
+            delete entry;
+        }
+        node = node_nxt;
+    }
+}
+
 #endif // wxUSE_BASE
 
 #if wxUSE_GUI