C++ SBEvent类代码示例

bool
SBListener::WaitForEventForBroadcasterWithType
(
    uint32_t num_seconds,
    const SBBroadcaster &broadcaster,
    uint32_t event_type_mask,
    SBEvent &event
)
{
    if (m_opaque_sp && broadcaster.IsValid())
    {
        TimeValue time_value;
        if (num_seconds != UINT32_MAX)
        {
            time_value = TimeValue::Now();
            time_value.OffsetWithSeconds (num_seconds);
        }
        EventSP event_sp;
        if (m_opaque_sp->WaitForEventForBroadcasterWithType (time_value.IsValid() ? &time_value : NULL,
                                                              broadcaster.get(),
                                                              event_type_mask,
                                                              event_sp))
        {
            event.reset (event_sp);
            return true;
        }
    }
    event.reset (NULL);
    return false;
}

void listener_func() {
  while (!g_done) {
    SBEvent event;
    bool got_event = g_listener.WaitForEvent(1, event);
    if (got_event) {
      if (!event.IsValid())
        throw Exception("event is not valid in listener thread");

      // send process description
      SBProcess process = SBProcess::GetProcessFromEvent(event);
      SBStream description;

      for (int i = 0; i < process.GetNumThreads(); ++i) {
        // send each thread description
        description.Clear();
        SBThread thread = process.GetThreadAtIndex(i);
        thread.GetDescription(description);
        g_thread_descriptions.push(description.GetData());

        // send each frame function name
        uint32_t num_frames = thread.GetNumFrames();
        for(int j = 0; j < num_frames; ++j) {
          const char* function_name = thread.GetFrameAtIndex(j).GetSymbol().GetName();
          if (function_name)
            g_frame_functions.push(function_name);
        }
      }
    }
  }
}

void
Driver::MainLoop ()
{
    SBEvent event;
    while (!GetIsDone())
    {
        m_listener->WaitForEvent (UINT32_MAX, event);
        if (event.IsValid())
		{
            ProcessEvent(event);
        }
    }
	
	
    DestroyPseudoTerminal();
    CloseIOChannelFile ();
 
    if (!iochannel_thread_exited)
    {
	        event.Clear();
        m_listener->GetNextEventForBroadcasterWithType (*m_io_channel_ap,
                                                        IOChannel::eBroadcastBitThreadDidExit,
                                                        event);
        if (!event.IsValid())
        {
            // Send end EOF to the driver file descriptor
            m_io_channel_ap->Stop();
        }
    }
	SBDebugger::Destroy (m_debugger);
}

WatchpointEventType
SBWatchpoint::GetWatchpointEventTypeFromEvent(const SBEvent &event) {
  if (event.IsValid())
    return Watchpoint::WatchpointEventData::GetWatchpointEventTypeFromEvent(
        event.GetSP());
  return eWatchpointEventTypeInvalidType;
}

void listener_func() {
  while (!g_done) {
    SBEvent event;
    bool got_event = g_listener.WaitForEvent(1, event);
    if (got_event) {
      if (!event.IsValid())
        throw Exception("event is not valid in listener thread");
        // send process description
        SBProcess process = SBProcess::GetProcessFromEvent(event);
        if (!process.IsValid())
            throw Exception("process is not valid");
        if (SBProcess::GetStateFromEvent(event) != lldb::eStateStopped || SBProcess::GetRestartedFromEvent(event))
            continue; // Only interested in "stopped" events.

        SBStream description;

        for (int i = 0; i < process.GetNumThreads(); ++i) {
            // send each thread description
            SBThread thread = process.GetThreadAtIndex(i);
            // send each frame function name
            uint32_t num_frames = thread.GetNumFrames();
            for(int j = 0; j < num_frames; ++j) {
                const char* function_name = thread.GetFrameAtIndex(j).GetSymbol().GetName();
                if (function_name)
                    g_frame_functions.push(string(function_name));
            }
        }
    }
  }
}

BreakpointEventType
SBBreakpoint::GetBreakpointEventTypeFromEvent (const SBEvent& event)
{
    if (event.IsValid())
        return Breakpoint::BreakpointEventData::GetBreakpointEventTypeFromEvent (event.GetSP());
    return eBreakpointEventTypeInvalidType;
}

bool
SBProcess::GetRestartedFromEvent (const SBEvent &event)
{
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    bool ret_val = Process::ProcessEventData::GetRestartedFromEvent (event.get());

    if (log)
        log->Printf ("SBProcess::%s (event.sp=%p) => %d", __FUNCTION__, event.get(), ret_val);

    return ret_val;
}

StateType
SBProcess::GetStateFromEvent (const SBEvent &event)
{
    LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    StateType ret_val = Process::ProcessEventData::GetStateFromEvent (event.get());
    
    if (log)
        log->Printf ("SBProcess::GetStateFromEvent (event.sp=%p) => %s", event.get(),
                     lldb_private::StateAsCString (ret_val));

    return ret_val;
}

void
Driver::ProcessEvent(SBEvent& event)
{
    if (!event.GetBroadcaster().IsValid())
        return;

    uint32_t event_type = event.GetType();
    if (event.BroadcasterMatchesRef (*m_io_channel_ap))
    {
        if ((event_type & IOChannel::eBroadcastBitThreadShouldExit) ||
            (event_type & IOChannel::eBroadcastBitThreadDidExit))
        {
            SetIsDone();
            if (event_type & IOChannel::eBroadcastBitThreadDidExit)
                iochannel_thread_exited = true;
        }
        else
        {
            if (HandleIOEvent (event))
                SetIsDone();
        }
    }
    else if (SBProcess::EventIsProcessEvent (event))
    {
        HandleProcessEvent (event);
    }
    else if (SBBreakpoint::EventIsBreakpointEvent (event))
    {
        HandleBreakpointEvent (event);
    }
    else if (event.BroadcasterMatchesRef (m_interpreter->GetBroadcaster()))
    {
        // TODO: deprecate the eBroadcastBitQuitCommandReceived event
        // now that we have SBCommandInterpreter::SetCommandOverrideCallback()
        // that can take over a command
        if (event_type & SBCommandInterpreter::eBroadcastBitQuitCommandReceived)
        {
            SetIsDone();
        }
        else if (event_type & SBCommandInterpreter::eBroadcastBitAsynchronousErrorData)
        {
            const char *data = SBEvent::GetCStringFromEvent (event);
            m_io_channel_ap->ErrWrite (data, strlen(data), ASYNC);
        }
        else if (event_type & SBCommandInterpreter::eBroadcastBitAsynchronousOutputData)
        {
            const char *data = SBEvent::GetCStringFromEvent (event);
            m_io_channel_ap->OutWrite (data, strlen(data), ASYNC);
        }
    }
}

void listener_func() {
    while (!g_done) {
        SBEvent event;
        bool got_event = g_listener.WaitForEvent(1, event);
        if (got_event) {
            if (!event.IsValid())
                throw Exception("event is not valid in listener thread");

            SBStream description;
            event.GetDescription(description);
            string str(description.GetData());
            g_event_descriptions.push(str);
        }
    }
}

bool
Driver::HandleIOEvent (const SBEvent &event)
{
    bool quit = false;

    const uint32_t event_type = event.GetType();

    if (event_type & IOChannel::eBroadcastBitHasUserInput)
    {
        // We got some input (i.e. a command string) from the user; pass it off to the command interpreter for
        // handling.

        const char *command_string = SBEvent::GetCStringFromEvent(event);
        if (command_string == NULL)
            command_string = "";
        SBCommandReturnObject result;
        
        // We don't want the result to bypass the OutWrite function in IOChannel, as this can result in odd
        // output orderings and problems with the prompt.
        m_debugger.GetCommandInterpreter().HandleCommand (command_string, result, true);

        if (result.GetOutputSize() > 0)
            m_io_channel_ap->OutWrite (result.GetOutput(), result.GetOutputSize(), NO_ASYNC);
            
        if (result.GetErrorSize() > 0)
            m_io_channel_ap->OutWrite (result.GetError(), result.GetErrorSize(), NO_ASYNC);

        // We are done getting and running our command, we can now clear the
        // m_waiting_for_command so we can get another one.
        m_waiting_for_command = false;

        // If our editline input reader is active, it means another input reader
        // got pushed onto the input reader and caused us to become deactivated.
        // When the input reader above us gets popped, we will get re-activated
        // and our prompt will refresh in our callback
        if (m_editline_reader.IsActive())
        {
            ReadyForCommand ();
        }
    }
    else if (event_type & IOChannel::eBroadcastBitUserInterrupt)
    {
        // This is here to handle control-c interrupts from the user.  It has not yet really been implemented.
        // TO BE DONE:  PROPERLY HANDLE CONTROL-C FROM USER
        //m_io_channel_ap->CancelInput();
        // Anything else?  Send Interrupt to process?
    }
    else if ((event_type & IOChannel::eBroadcastBitThreadShouldExit) ||
             (event_type & IOChannel::eBroadcastBitThreadDidExit))
    {
        // If the IOChannel thread is trying to go away, then it is definitely
        // time to end the debugging session.
        quit = true;
    }

    return quit;
}

void listener_func() {
  while (!g_done) {
    SBEvent event;
    bool got_event = g_listener.WaitForEvent(1, event);
    if (got_event) {
      if (!event.IsValid())
        throw Exception("event is not valid in listener thread");

      SBProcess process = SBProcess::GetProcessFromEvent(event);
      if (process.GetState() == eStateStopped) {
        SBError error = process.Continue();
        if (!error.Success())
          throw Exception(string("Cannot continue process from listener thread: ")
                          + error.GetCString());
        g_process_started.push(true);
      }
    }
  }
}

void
SBBroadcaster::BroadcastEvent (const SBEvent &event, bool unique)
{
    if (m_opaque == NULL)
        return;

    EventSP event_sp = event.GetSP ();
    if (unique)
        m_opaque->BroadcastEventIfUnique (event_sp);
    else
        m_opaque->BroadcastEvent (event_sp);
}

bool
SBListener::WaitForEvent (uint32_t num_seconds, SBEvent &event)
{
    if (m_opaque_ptr)
    {
        TimeValue time_value;
        if (num_seconds != UINT32_MAX)
        {
            assert (num_seconds != 0); // Take this out after all calls with timeout set to zero have been removed....
            time_value = TimeValue::Now();
            time_value.OffsetWithSeconds (num_seconds);
        }
        EventSP event_sp;
        if (m_opaque_ptr->WaitForEvent (time_value.IsValid() ? &time_value : NULL, event_sp))
        {
            event.reset (event_sp);
            return true;
        }
    }
    event.reset (NULL);
    return false;
}

bool
SBListener::GetNextEventForBroadcasterWithType
(
    const SBBroadcaster &broadcaster,
    uint32_t event_type_mask,
    SBEvent &event
)
{
    if (m_opaque_ptr && broadcaster.IsValid())
    {
        EventSP event_sp;
        if (m_opaque_ptr->GetNextEventForBroadcasterWithType (broadcaster.get(),
                                                              event_type_mask,
                                                              event_sp))
        {
            event.reset (event_sp);
            return true;
        }
    }
    event.reset (NULL);
    return false;
}