X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e48a3055145e5d3f77b17383ed7521585ea7391d..bcf324bebe65cd7ee49c139533ceea52dceb4b91:/src/dfb/evtloop.cpp?ds=sidebyside

diff --git a/src/dfb/evtloop.cpp b/src/dfb/evtloop.cpp
index 52b940c9f4..d18b73a251 100644
--- a/src/dfb/evtloop.cpp
+++ b/src/dfb/evtloop.cpp
@@ -25,125 +25,101 @@
     #include "wx/app.h"
 #endif
 
-#include "wx/timer.h"
+#include "wx/thread.h"
+#include "wx/private/fdiodispatcher.h"
 #include "wx/dfb/private.h"
+#include "wx/nonownedwnd.h"
+#include "wx/buffer.h"
 
-#define TRACE_EVENTS _T("events")
+#include <errno.h>
+
+#define TRACE_EVENTS "events"
 
 // ===========================================================================
 // implementation
 // ===========================================================================
 
 //-----------------------------------------------------------------------------
-// wxEventLoop initialization
+// wxDFBEventsHandler
 //-----------------------------------------------------------------------------
 
-wxIDirectFBEventBufferPtr wxEventLoop::ms_buffer;
-
-wxEventLoop::wxEventLoop()
+// This handler is installed to process input on DirectFB's events socket (
+// obtained using CreateFileDescriptor()). When IDirectFBEventBuffer is used
+// in this mode, events are written to the file descriptor and we read them
+// in OnReadWaiting() below.
+class wxDFBEventsHandler : public wxFDIOHandler
 {
-    if ( !ms_buffer )
-        InitBuffer();
-}
+public:
+    wxDFBEventsHandler()
+        : m_fd(-1), m_offset(0)
+    {}
 
-/* static */
-void wxEventLoop::InitBuffer()
-{
-    ms_buffer = wxIDirectFB::Get()->CreateEventBuffer();
-}
+    void SetFD(int fd) { m_fd = fd; }
 
-/* static */
-void wxEventLoop::CleanUp()
-{
-    ms_buffer.Reset();
-}
+    void Reset()
+    {
+        m_fd = -1;
+        m_offset = 0;
+    }
 
-/* static */
-wxIDirectFBEventBufferPtr wxEventLoop::GetDirectFBEventBuffer()
-{
-    if ( !ms_buffer )
-        InitBuffer();
+    // implement wxFDIOHandler pure virtual methods
+    virtual void OnReadWaiting();
+    virtual void OnWriteWaiting()
+        { wxFAIL_MSG("OnWriteWaiting shouldn't be called"); }
+    virtual void OnExceptionWaiting()
+        { wxFAIL_MSG("OnExceptionWaiting shouldn't be called"); }
 
-    return ms_buffer;
-}
+private:
+    // DirectFB -> wxWidgets events translation
+    void HandleDFBEvent(const wxDFBEvent& event);
 
-//-----------------------------------------------------------------------------
-// events dispatch and loop handling
-//-----------------------------------------------------------------------------
-
-bool wxEventLoop::Pending() const
-{
-    wxCHECK_MSG( ms_buffer, false, _T("invalid event buffer") );
+    int m_fd;
+    size_t m_offset;
+    DFBEvent m_event;
+};
 
-    return ms_buffer->HasEvent();
-}
-
-bool wxEventLoop::Dispatch()
+void wxDFBEventsHandler::OnReadWaiting()
 {
-    wxCHECK_MSG( ms_buffer, false, _T("invalid event buffer") );
-
-    // NB: we don't block indefinitely waiting for an event, but instead
-    //     time out after a brief period in order to make sure that
-    //     OnNextIteration() will be called frequently enough
-    //
-    //     FIXME: call NotifyTimers() from here (and loop) instead?
-    const int TIMEOUT = 100;
-
-    if ( ms_buffer->WaitForEventWithTimeout(0, TIMEOUT) )
+    for ( ;; )
     {
-        switch ( ms_buffer->GetLastResult() )
+        int size = read(m_fd,
+                        ((char*)&m_event) + m_offset,
+                        sizeof(m_event) - m_offset);
+
+        if ( size == 0 || (size == -1 && (errno == EAGAIN || errno == EINTR)) )
         {
-            case DFB_OK:
-            {
-                wxDFBEvent e;
-                ms_buffer->GetEvent(e);
-                HandleDFBEvent(e);
-                break;
-            }
-
-            case DFB_TIMEOUT:
-                // timed out, pretend we processed an event so that
-                // OnNextIteration is called
-                break;
-
-            default:
-                // don't terminate the loop due to errors (they were reported
-                // already by ms_buffer)
-                break;
+            // nothing left in the pipe (EAGAIN is expected for an FD with
+            // O_NONBLOCK)
+            break;
         }
-    }
 
-    return true;
-}
+        if ( size == -1 )
+        {
+            wxLogSysError(_("Failed to read event from DirectFB pipe"));
+            break;
+        }
 
-void wxEventLoop::WakeUp()
-{
-    wxCHECK_RET( ms_buffer, _T("invalid event buffer") );
+        size += m_offset;
+        m_offset = 0;
 
-    ms_buffer->WakeUp();
-}
+        if ( size != sizeof(m_event) )
+        {
+            m_offset = size;
+            break;
+        }
 
-void wxEventLoop::OnNextIteration()
-{
-#if wxUSE_TIMER
-    // see the comment in Dispatch
-    wxTimer::NotifyTimers();
-#endif
+        HandleDFBEvent(m_event);
+    }
 }
 
-
-//-----------------------------------------------------------------------------
-// DirectFB -> wxWidgets events translation
-//-----------------------------------------------------------------------------
-
-void wxEventLoop::HandleDFBEvent(const wxDFBEvent& event)
+void wxDFBEventsHandler::HandleDFBEvent(const wxDFBEvent& event)
 {
     switch ( event.GetClass() )
     {
         case DFEC_WINDOW:
         {
             wxDFBWindowEvent winevent(((const DFBEvent&)event).window);
-            wxTopLevelWindowDFB::HandleDFBWindowEvent(winevent);
+            wxNonOwnedWindow::HandleDFBWindowEvent(winevent);
             break;
         }
 
@@ -155,8 +131,85 @@ void wxEventLoop::HandleDFBEvent(const wxDFBEvent& event)
 #endif
         {
             wxLogTrace(TRACE_EVENTS,
-                       _T("ignoring event of unsupported class %i"),
+                       "ignoring event of unsupported class %i",
                        (int)event.GetClass());
         }
     }
 }
+
+//-----------------------------------------------------------------------------
+// wxEventLoop initialization
+//-----------------------------------------------------------------------------
+
+wxIDirectFBEventBufferPtr wxGUIEventLoop::ms_buffer;
+int wxGUIEventLoop::ms_bufferFd;
+static wxDFBEventsHandler gs_DFBEventsHandler;
+
+wxGUIEventLoop::wxGUIEventLoop()
+{
+    // Note that this has to be done here so that the buffer is ready when
+    // an event loop runs; GetDirectFBEventBuffer(), which also calls
+    // InitBuffer(), may be called before or after the first wxGUIEventLoop
+    // instance is created.
+    if ( !ms_buffer )
+        InitBuffer();
+}
+
+/* static */
+void wxGUIEventLoop::InitBuffer()
+{
+    // create DirectFB events buffer:
+    ms_buffer = wxIDirectFB::Get()->CreateEventBuffer();
+
+    // and setup a file descriptor that we can watch for new events:
+
+    ms_buffer->CreateFileDescriptor(&ms_bufferFd);
+    int flags = fcntl(ms_bufferFd, F_GETFL, 0);
+    if ( flags == -1 || fcntl(ms_bufferFd, F_SETFL, flags | O_NONBLOCK) == -1 )
+    {
+        wxLogSysError(_("Failed to switch DirectFB pipe to non-blocking mode"));
+        return;
+    }
+
+    wxFDIODispatcher *dispatcher = wxFDIODispatcher::Get();
+    wxCHECK_RET( dispatcher, "wxDFB requires wxFDIODispatcher" );
+
+    gs_DFBEventsHandler.SetFD(ms_bufferFd);
+    dispatcher->RegisterFD(ms_bufferFd, &gs_DFBEventsHandler, wxFDIO_INPUT);
+}
+
+/* static */
+void wxGUIEventLoop::CleanUp()
+{
+    wxFDIODispatcher *dispatcher = wxFDIODispatcher::Get();
+    wxCHECK_RET( dispatcher, "wxDFB requires wxFDIODispatcher" );
+    dispatcher->UnregisterFD(ms_bufferFd);
+
+    ms_buffer.Reset();
+    gs_DFBEventsHandler.Reset();
+}
+
+/* static */
+wxIDirectFBEventBufferPtr wxGUIEventLoop::GetDirectFBEventBuffer()
+{
+    if ( !ms_buffer )
+        InitBuffer();
+
+    return ms_buffer;
+}
+
+//-----------------------------------------------------------------------------
+// events dispatch and loop handling
+//-----------------------------------------------------------------------------
+
+void wxGUIEventLoop::Yield()
+{
+    // TODO: implement event filtering using the eventsToProcess mask
+
+    // process all pending events:
+    while ( Pending() )
+        Dispatch();
+
+    // handle timers, sockets etc.
+    OnNextIteration();
+}