namespace
{
-// Message codes
+// Message codes (don't change them to avoid breaking the existing code using
+// wxIPC protocol!)
enum IPCCode
{
- IPC_EXECUTE = 1,
- IPC_REQUEST,
- IPC_POKE,
- IPC_ADVISE_START,
- IPC_ADVISE_REQUEST,
- IPC_ADVISE,
- IPC_ADVISE_STOP,
- IPC_REQUEST_REPLY,
- IPC_FAIL,
- IPC_CONNECT,
- IPC_DISCONNECT
+ IPC_EXECUTE = 1,
+ IPC_REQUEST = 2,
+ IPC_POKE = 3,
+ IPC_ADVISE_START = 4,
+ IPC_ADVISE_REQUEST = 5,
+ IPC_ADVISE = 6,
+ IPC_ADVISE_STOP = 7,
+ IPC_REQUEST_REPLY = 8,
+ IPC_FAIL = 9,
+ IPC_CONNECT = 10,
+ IPC_DISCONNECT = 11,
+ IPC_MAX
};
} // anonymous namespace
class wxTCPEventHandler : public wxEvtHandler
{
public:
- wxTCPEventHandler() : wxEvtHandler() {}
+ wxTCPEventHandler() : wxEvtHandler() { }
void Client_OnRequest(wxSocketEvent& event);
void Server_OnRequest(wxSocketEvent& event);
+private:
DECLARE_EVENT_TABLE()
DECLARE_NO_COPY_CLASS(wxTCPEventHandler)
};
_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)
+ DECLARE_NO_COPY_CLASS(wxTCPEventHandlerModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxTCPEventHandlerModule, wxModule)
+
+wxTCPEventHandler *wxTCPEventHandlerModule::ms_handler = NULL;
// --------------------------------------------------------------------------
// wxIPCSocketStreams
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);
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);
IPCOutput(m_streams).Write(IPC_REQUEST, item, format);
- int ret = m_streams->Read8();
- if ( ret == IPC_FAIL )
+ const int ret = m_streams->Read8();
+ 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,
IPCOutput(m_streams).Write(IPC_ADVISE_START, item);
- int ret = m_streams->Read8();
- if (ret != IPC_FAIL)
- return true;
- else
- return false;
+ const int ret = m_streams->Read8();
+
+ return ret == IPC_ADVISE_START;
}
bool wxTCPConnection::StopAdvise (const wxString& item)
IPCOutput(m_streams).Write(IPC_ADVISE_STOP, item);
- int ret = m_streams->Read8();
+ const int ret = m_streams->Read8();
- if (ret != IPC_FAIL)
- return true;
- else
- return false;
+ return ret == IPC_ADVISE_STOP;
}
// Calls that SERVER can make
const wxString topic = connection->m_topic;
wxString item;
- switch ( const int msg = streams->Read8() )
+ bool error = false;
+
+ const int msg = streams->Read8();
+ switch ( msg )
{
case IPC_EXECUTE:
{
wxIPCFormat format;
- size_t size;
+ size_t size wxDUMMY_INITIALIZE(0);
void * const
data = streams->ReadFormatData(connection, &format, &size);
-
- connection->OnExecute(topic, data, size, format);
+ if ( data )
+ connection->OnExecute(topic, data, size, format);
+ else
+ error = true;
}
break;
item = streams->ReadString();
wxIPCFormat format;
- size_t size;
+ size_t size wxDUMMY_INITIALIZE(0);
void * const
data = streams->ReadFormatData(connection, &format, &size);
- connection->OnAdvise(topic, item, data, size, format);
+ if ( data )
+ connection->OnAdvise(topic, item, data, size, format);
+ else
+ error = true;
}
break;
item = streams->ReadString();
wxIPCFormat format = (wxIPCFormat)streams->Read8();
- size_t size;
+ size_t size wxDUMMY_INITIALIZE(0);
void * const data = streams->ReadData(connection, &size);
- connection->OnPoke(topic, item, data, size, format);
+ if ( data )
+ connection->OnPoke(topic, item, data, size, format);
+ else
+ error = true;
}
break;
connection->OnDisconnect();
break;
+ case IPC_FAIL:
+ wxLogDebug("Unexpected IPC_FAIL received");
+ error = true;
+ break;
+
default:
wxLogDebug("Unknown message code %d received.", msg);
- IPCOutput(streams).Write8(IPC_FAIL);
+ error = true;
break;
}
+
+ if ( error )
+ IPCOutput(streams).Write8(IPC_FAIL);
}
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);
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
projects / wxWidgets.git / blobdiff