Callback in thread issue

Mbed OS
1

Hi,

From a class I’m trying to send a callback but I’m facing problem on the data which are empty.
Let’s explain. Here is my class:

Header:

class ProtocolManager
{
private:
    Thread * _callbackThread;

public:
    ProtocolManager();
    ~ProtocolManager();

    Callback<void(int,int,char*,int)> CommandCallback;
    Message * _pMessage;

    // Function to process the received buffer from serial source
    void ProcessBuffer(char * receivedBuffer, int * receivedBufferSize);
    void RegisterCommandCallback(Callback<void(int,int,char*,int)> commandCallback);

private:
    static void SendCallback(ProtocolManager * pManager);
};

Implementation:

void ProtocolManager::RegisterCommandCallback(Callback<void(int,int,char*,int)> commandCallback)
{
    CommandCallback = commandCallback;
}

void ProtocolManager::ProcessBuffer(char * receivedBuffer, int * receivedBufferSize)
{
    if(_pMessage != NULL)
        delete _pMessage;

    // Check the dataRaw buffer and extract frame if detected
    _pMessage = new Message();
    _pMessage->Build(receivedBuffer, receivedBufferSize);

    _callbackThread = new Thread();
    _callbackThread->start(callback(ProtocolManager::SendCallback, this));                
}

void ProtocolManager::SendCallback(ProtocolManager * pManager)
{
    // Send command info to client
    pManager->CommandCallback.call(pManager->_pMessage->_commandId, pManager->_pMessage->_frameId, pManager->_pMessage->_data, pManager->_pMessage->_dataLength);
}

In the main.cpp:

void (*CommandCallback)(int commandId, int frameId, char * data, int dataLength) = &OnCommand;
ProtocolManager _manager;
_manager.RegisterCommandCallback(callback(CommandCallback));

...

void OnCommand(int commandId, int frameId, char * data, int dataLength)
{
    // Here all arguments are empty, i.e commandId == 0
    printf("Command received = %d, %d, %d [%p]\r\n", commandId, frameId, dataLength, ThisThread::get_id());
}

My problem is that in the OnCommand function (inside the main) the commandId parameter becomes 0 instead of 7 (for example). So it seems that inside the CommandCallback its arguments were reset.

Can you help me achieving this callback ?

Thanks
Frédéric