fix harmless warnings about uninitialized (not really) variables in MSVC release...

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

diff --git a/src/common/sckipc.cpp b/src/common/sckipc.cpp
index b1223d249b3a8ae4bed4f34fee400534bbe8a19a..8348ec749fb0ef2e45dcc7e2e8d4f96027bf9b30 100644 (file)
--- a/src/common/sckipc.cpp
+++ b/src/common/sckipc.cpp
@@ -119,13 +119,16 @@ GetAddressFromName(const wxString& serverName,
 class wxTCPEventHandler : public wxEvtHandler
 {
 public:
-    wxTCPEventHandler() : wxEvtHandler() {}
+    wxTCPEventHandler() : wxEvtHandler() { }
 
     void Client_OnRequest(wxSocketEvent& event);
     void Server_OnRequest(wxSocketEvent& event);
 
+private:
+    void HandleDisconnect(wxTCPConnection *connection);
+
     DECLARE_EVENT_TABLE()
-    DECLARE_NO_COPY_CLASS(wxTCPEventHandler)
+    wxDECLARE_NO_COPY_CLASS(wxTCPEventHandler);
 };
 
 enum
@@ -134,7 +137,38 @@ enum
     _SERVER_ONREQUEST_ID
 };
 
-static wxTCPEventHandler *gs_handler = NULL;
+// --------------------------------------------------------------------------
+// wxTCPEventHandlerModule (private class)
+// --------------------------------------------------------------------------
+
+class wxTCPEventHandlerModule : public wxModule
+{
+public:
+    wxTCPEventHandlerModule() : wxModule() { }
+
+    // get the global wxTCPEventHandler creating it if necessary
+    static wxTCPEventHandler& GetHandler()
+    {
+        if ( !ms_handler )
+            ms_handler = new wxTCPEventHandler;
+
+        return *ms_handler;
+    }
+
+    // as ms_handler is initialized on demand, don't do anything in OnInit()
+    virtual bool OnInit() { return true; }
+    virtual void OnExit() { wxDELETE(ms_handler); }
+
+private:
+    static wxTCPEventHandler *ms_handler;
+
+    DECLARE_DYNAMIC_CLASS(wxTCPEventHandlerModule)
+    wxDECLARE_NO_COPY_CLASS(wxTCPEventHandlerModule);
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxTCPEventHandlerModule, wxModule)
+
+wxTCPEventHandler *wxTCPEventHandlerModule::ms_handler = NULL;
 
 // --------------------------------------------------------------------------
 // wxIPCSocketStreams
@@ -152,11 +186,11 @@ public:
     // ctor initializes all the streams on top of the given socket
     //
     // note that we use a bigger than default buffer size which matches the
-    // typical Ethernet MTU
+    // typical Ethernet MTU (minus TCP header overhead)
     wxIPCSocketStreams(wxSocketBase& sock)
         : m_socketStream(sock),
 #ifdef USE_BUFFER
-          m_bufferedOut(m_socketStream, 1500),
+          m_bufferedOut(m_socketStream, 1448),
 #else
           m_bufferedOut(m_socketStream),
 #endif
@@ -250,7 +284,7 @@ private:
     wxDataInputStream  m_dataIn;
     wxDataOutputStream m_dataOut;
 
-    DECLARE_NO_COPY_CLASS(wxIPCSocketStreams)
+    wxDECLARE_NO_COPY_CLASS(wxIPCSocketStreams);
 };
 
 namespace
@@ -307,7 +341,7 @@ public:
 private:
     wxIPCSocketStreams& m_streams;
 
-    DECLARE_NO_COPY_CLASS(IPCOutput)
+    wxDECLARE_NO_COPY_CLASS(IPCOutput);
 };
 
 } // anonymous namespace
@@ -370,7 +404,8 @@ wxConnectionBase *wxTCPClient::MakeConnection(const wxString& host,
                     connection->m_topic = topic;
                     connection->m_sock  = client;
                     connection->m_streams = streams;
-                    client->SetEventHandler(*gs_handler, _CLIENT_ONREQUEST_ID);
+                    client->SetEventHandler(wxTCPEventHandlerModule::GetHandler(),
+                                            _CLIENT_ONREQUEST_ID);
                     client->SetClientData(connection);
                     client->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG);
                     client->Notify(true);
@@ -471,7 +506,8 @@ bool wxTCPServer::Create(const wxString& serverName)
         return false;
     }
 
-    m_server->SetEventHandler(*gs_handler, _SERVER_ONREQUEST_ID);
+    m_server->SetEventHandler(wxTCPEventHandlerModule::GetHandler(),
+                              _SERVER_ONREQUEST_ID);
     m_server->SetClientData(this);
     m_server->SetNotify(wxSOCKET_CONNECTION_FLAG);
     m_server->Notify(true);
@@ -582,7 +618,11 @@ const void *wxTCPConnection::Request(const wxString& item,
     if ( ret != IPC_REQUEST_REPLY )
         return NULL;
 
-    return m_streams->ReadData(this, size);
+    // ReadData() needs a non-NULL size pointer but the client code can call us
+    // with NULL pointer (this makes sense if it knows that it always works
+    // with NUL-terminated strings)
+    size_t sizeFallback;
+    return m_streams->ReadData(this, size ? size : &sizeFallback);
 }
 
 bool wxTCPConnection::DoPoke(const wxString& item,
@@ -649,25 +689,33 @@ BEGIN_EVENT_TABLE(wxTCPEventHandler, wxEvtHandler)
     EVT_SOCKET(_SERVER_ONREQUEST_ID, wxTCPEventHandler::Server_OnRequest)
 END_EVENT_TABLE()
 
+void wxTCPEventHandler::HandleDisconnect(wxTCPConnection *connection)
+{
+    // connection was closed (either gracefully or not): destroy everything
+    connection->m_sock->Notify(false);
+    connection->m_sock->Close();
+
+    connection->SetConnected(false);
+    connection->OnDisconnect();
+}
+
 void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
 {
     wxSocketBase *sock = event.GetSocket();
     if (!sock)
-        return ;
+        return;
 
     wxSocketNotify evt = event.GetSocketEvent();
-    wxTCPConnection *connection = (wxTCPConnection *)(sock->GetClientData());
+    wxTCPConnection * const
+        connection = static_cast<wxTCPConnection *>(sock->GetClientData());
 
     // This socket is being deleted; skip this event
     if (!connection)
         return;
 
-    // We lost the connection: destroy everything
-    if (evt == wxSOCKET_LOST)
+    if ( evt == wxSOCKET_LOST )
     {
-        sock->Notify(false);
-        sock->Close();
-        connection->OnDisconnect();
+        HandleDisconnect(connection);
         return;
     }
 
@@ -788,10 +836,7 @@ void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
             break;
 
         case IPC_DISCONNECT:
-            sock->Notify(false);
-            sock->Close();
-            connection->SetConnected(false);
-            connection->OnDisconnect();
+            HandleDisconnect(connection);
             break;
 
         case IPC_FAIL:
@@ -813,7 +858,7 @@ void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event)
 {
     wxSocketServer *server = (wxSocketServer *) event.GetSocket();
     if (!server)
-        return ;
+        return;
     wxTCPServer *ipcserv = (wxTCPServer *) server->GetClientData();
 
     // This socket is being deleted; skip this event
@@ -826,7 +871,7 @@ void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event)
     // Accept the connection, getting a new socket
     wxSocketBase *sock = server->Accept();
     if (!sock)
-        return ;
+        return;
     if (!sock->Ok())
     {
         sock->Destroy();
@@ -856,7 +901,8 @@ void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event)
                     new_connection->m_sock = sock;
                     new_connection->m_streams = streams;
                     new_connection->m_topic = topic;
-                    sock->SetEventHandler(*gs_handler, _CLIENT_ONREQUEST_ID);
+                    sock->SetEventHandler(wxTCPEventHandlerModule::GetHandler(),
+                                          _CLIENT_ONREQUEST_ID);
                     sock->SetClientData(new_connection);
                     sock->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG);
                     sock->Notify(true);
@@ -878,19 +924,4 @@ void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event)
     sock->Destroy();
 }
 
-// --------------------------------------------------------------------------
-// wxTCPEventHandlerModule (private class)
-// --------------------------------------------------------------------------
-
-class wxTCPEventHandlerModule: public wxModule
-{
-public:
-    virtual bool OnInit() { gs_handler = new wxTCPEventHandler; return true; }
-    virtual void OnExit() { wxDELETE(gs_handler); }
-
-    DECLARE_DYNAMIC_CLASS(wxTCPEventHandlerModule)
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxTCPEventHandlerModule, wxModule)
-
 #endif // wxUSE_SOCKETS && wxUSE_IPC && wxUSE_STREAMS