// Purpose: wxEventLoop implementation
// Author: Lukasz Michalski (lm@zork.pl)
// Created: 2007-05-07
-// RCS-ID: $Id$
// Copyright: (c) 2006 Zork Lukasz Michalski
+// (c) 2009, 2013 Vadim Zeitlin <vadim@wxwidgets.org>
+// (c) 2013 Rob Bresalier
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/log.h"
#endif
-#include <errno.h>
#include "wx/apptrait.h"
+#include "wx/scopedptr.h"
#include "wx/thread.h"
#include "wx/module.h"
-#include "wx/unix/pipe.h"
#include "wx/unix/private/timer.h"
#include "wx/unix/private/epolldispatcher.h"
+#include "wx/unix/private/wakeuppipe.h"
#include "wx/private/selectdispatcher.h"
+#include "wx/private/eventloopsourcesmanager.h"
+#include "wx/private/fdioeventloopsourcehandler.h"
+#include "wx/private/eventloopsourcesmanager.h"
-#define TRACE_EVENTS _T("events")
+#if wxUSE_EVENTLOOP_SOURCE
+ #include "wx/evtloopsrc.h"
+#endif // wxUSE_EVENTLOOP_SOURCE
// ===========================================================================
-// wxEventLoop::PipeIOHandler implementation
+// wxEventLoop implementation
// ===========================================================================
-namespace wxPrivate
-{
+//-----------------------------------------------------------------------------
+// initialization
+//-----------------------------------------------------------------------------
-// pipe used for wake up messages: when a child thread wants to wake up
-// the event loop in the main thread it writes to this pipe
-class PipeIOHandler : public wxFDIOHandler
+wxConsoleEventLoop::wxConsoleEventLoop()
{
-public:
- // default ctor does nothing, call Create() to really initialize the
- // object
- PipeIOHandler() { }
-
- bool Create();
-
- // this method can be, and normally is, called from another thread
- void WakeUp();
+ // Be pessimistic initially and assume that we failed to initialize.
+ m_dispatcher = NULL;
+ m_wakeupPipe = NULL;
+ m_wakeupSource = NULL;
+
+ // Create the pipe.
+ wxScopedPtr<wxWakeUpPipeMT> wakeupPipe(new wxWakeUpPipeMT);
+ const int pipeFD = wakeupPipe->GetReadFd();
+ if ( pipeFD == wxPipe::INVALID_FD )
+ return;
- int GetReadFd() { return m_pipe[wxPipe::Read]; }
+ // And start monitoring it in our event loop.
+ m_wakeupSource = wxEventLoopBase::AddSourceForFD
+ (
+ pipeFD,
+ wakeupPipe.get(),
+ wxFDIO_INPUT
+ );
- // implement wxFDIOHandler pure virtual methods
- virtual void OnReadWaiting();
- virtual void OnWriteWaiting() { }
- virtual void OnExceptionWaiting() { }
+ if ( !m_wakeupSource )
+ return;
-private:
- wxPipe m_pipe;
-};
+ // This is a bit ugly but we know that AddSourceForFD() used the currently
+ // active dispatcher to register this source, so use the same one for our
+ // other operations. Of course, currently the dispatcher returned by
+ // wxFDIODispatcher::Get() is always the same one anyhow so it doesn't
+ // really matter, but if we started returning different things later, it
+ // would.
+ m_dispatcher = wxFDIODispatcher::Get();
-// ----------------------------------------------------------------------------
-// initialization
-// ----------------------------------------------------------------------------
+ m_wakeupPipe = wakeupPipe.release();
+}
-bool PipeIOHandler::Create()
+wxConsoleEventLoop::~wxConsoleEventLoop()
{
- if ( !m_pipe.Create() )
+ if ( m_wakeupPipe )
{
- wxLogError(_("Failed to create wake up pipe used by event loop."));
- return false;
- }
+ delete m_wakeupSource;
- const int fdRead = GetReadFd();
-
- int flags = fcntl(fdRead, F_GETFL, 0);
- if ( flags == -1 || fcntl(fdRead, F_SETFL, flags | O_NONBLOCK) == -1 )
- {
- wxLogSysError(_("Failed to switch wake up pipe to non-blocking mode"));
- return false;
+ delete m_wakeupPipe;
}
-
- wxLogTrace(TRACE_EVENTS, wxT("Wake up pipe (%d, %d) created"),
- fdRead, m_pipe[wxPipe::Write]);
-
- return true;
}
-// ----------------------------------------------------------------------------
-// wakeup handling
-// ----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+// adding & removing sources
+//-----------------------------------------------------------------------------
-void PipeIOHandler::WakeUp()
-{
- if ( write(m_pipe[wxPipe::Write], "s", 1) != 1 )
- {
- // don't use wxLog here, we can be in another thread and this could
- // result in dead locks
- perror("write(wake up pipe)");
- }
-}
+#if wxUSE_EVENTLOOP_SOURCE
-void PipeIOHandler::OnReadWaiting()
+class wxConsoleEventLoopSourcesManager : public wxEventLoopSourcesManagerBase
{
- // got wakeup from child thread: read all data available in pipe just to
- // make it empty (even though we write one byte at a time from WakeUp(),
- // it could have been called several times)
- char buf[4];
- for ( ;; )
+public:
+ wxEventLoopSource* AddSourceForFD( int fd,
+ wxEventLoopSourceHandler *handler,
+ int flags)
{
- const int size = read(GetReadFd(), buf, WXSIZEOF(buf));
+ wxCHECK_MSG( fd != -1, NULL, "can't monitor invalid fd" );
- if ( size == 0 || (size == -1 && (errno == EAGAIN || errno == EINTR)) )
- {
- // nothing left in the pipe (EAGAIN is expected for an FD with
- // O_NONBLOCK)
- break;
- }
+ wxLogTrace(wxTRACE_EVT_SOURCE,
+ "Adding event loop source for fd=%d", fd);
- if ( size == -1 )
- {
- wxLogSysError(_("Failed to read from wake-up pipe"));
+ // we need a bridge to wxFDIODispatcher
+ //
+ // TODO: refactor the code so that only wxEventLoopSourceHandler is used
+ wxScopedPtr<wxFDIOHandler>
+ fdioHandler(new wxFDIOEventLoopSourceHandler(handler));
- break;
- }
- }
+ if ( !wxFDIODispatcher::Get()->RegisterFD(fd, fdioHandler.get(), flags) )
+ return NULL;
- // writing to the wake up pipe will make wxConsoleEventLoop return from
- // wxFDIODispatcher::Dispatch() it might be currently blocking in, nothing
- // else needs to be done
-}
-
-} // namespace wxPrivate
+ return new wxUnixEventLoopSource(wxFDIODispatcher::Get(), fdioHandler.release(),
+ fd, handler, flags);
+ }
+};
-// ===========================================================================
-// wxEventLoop implementation
-// ===========================================================================
+wxEventLoopSourcesManagerBase* wxAppTraits::GetEventLoopSourcesManager()
+{
+ static wxConsoleEventLoopSourcesManager s_eventLoopSourcesManager;
-//-----------------------------------------------------------------------------
-// initialization
-//-----------------------------------------------------------------------------
+ return &s_eventLoopSourcesManager;
+}
-wxConsoleEventLoop::wxConsoleEventLoop()
+wxUnixEventLoopSource::~wxUnixEventLoopSource()
{
- m_wakeupPipe = new wxPrivate::PipeIOHandler();
- if ( !m_wakeupPipe->Create() )
- {
- wxDELETE(m_wakeupPipe);
- m_dispatcher = NULL;
- return;
- }
+ wxLogTrace(wxTRACE_EVT_SOURCE,
+ "Removing event loop source for fd=%d", m_fd);
- m_dispatcher = wxFDIODispatcher::Get();
- if ( !m_dispatcher )
- return;
+ m_dispatcher->UnregisterFD(m_fd);
- m_dispatcher->RegisterFD
- (
- m_wakeupPipe->GetReadFd(),
- m_wakeupPipe,
- wxFDIO_INPUT
- );
+ delete m_fdioHandler;
}
-wxConsoleEventLoop::~wxConsoleEventLoop()
-{
- delete m_wakeupPipe;
-}
+#endif // wxUSE_EVENTLOOP_SOURCE
//-----------------------------------------------------------------------------
// events dispatch and loop handling
projects / wxWidgets.git / blobdiff