// 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
/////////////////////////////////////////////////////////////////////////////
#if wxUSE_CONSOLE_EVENTLOOP
+#include "wx/evtloop.h"
+
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/log.h"
#endif
-#include <errno.h>
-#include "wx/evtloop.h"
+#include "wx/apptrait.h"
+#include "wx/scopedptr.h"
#include "wx/thread.h"
#include "wx/module.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
// ===========================================================================
-// ----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
// initialization
-// ----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
-bool wxConsoleEventLoop::PipeIOHandler::Create()
+wxConsoleEventLoop::wxConsoleEventLoop()
{
- if ( !m_pipe.Create() )
- {
- wxLogError(_("Failed to create wake up pipe used by event loop."));
- return false;
- }
+ // 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;
- const int fdRead = GetReadFd();
+ // And start monitoring it in our event loop.
+ m_wakeupSource = wxEventLoopBase::AddSourceForFD
+ (
+ pipeFD,
+ wakeupPipe.get(),
+ wxFDIO_INPUT
+ );
- 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;
- }
+ if ( !m_wakeupSource )
+ return;
- wxLogTrace(TRACE_EVENTS, wxT("Wake up pipe (%d, %d) created"),
- fdRead, m_pipe[wxPipe::Write]);
+ // 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();
- return true;
+ m_wakeupPipe = wakeupPipe.release();
}
-// ----------------------------------------------------------------------------
-// wakeup handling
-// ----------------------------------------------------------------------------
-
-void wxConsoleEventLoop::PipeIOHandler::WakeUp()
+wxConsoleEventLoop::~wxConsoleEventLoop()
{
- if ( write(m_pipe[wxPipe::Write], "s", 1) != 1 )
+ if ( m_wakeupPipe )
{
- // don't use wxLog here, we can be in another thread and this could
- // result in dead locks
- perror("write(wake up pipe)");
+ delete m_wakeupSource;
+
+ delete m_wakeupPipe;
}
}
-void wxConsoleEventLoop::PipeIOHandler::OnReadWaiting()
+//-----------------------------------------------------------------------------
+// adding & removing sources
+//-----------------------------------------------------------------------------
+
+#if wxUSE_EVENTLOOP_SOURCE
+
+class wxConsoleEventLoopSourcesManager : public wxEventLoopSourcesManagerBase
{
- // got wakeup from child thread: read all data available in pipe just to
- // make it empty (evevn 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) )
- {
- // 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;
- wxTheApp->ProcessPendingEvents();
-}
+ 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()
{
- if ( !m_wakeupPipe.Create() )
- {
- 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;
}
+#endif // wxUSE_EVENTLOOP_SOURCE
+
//-----------------------------------------------------------------------------
// events dispatch and loop handling
//-----------------------------------------------------------------------------
bool wxConsoleEventLoop::Pending() const
{
- return wxTheApp->HasPendingEvents();
+ if ( m_dispatcher->HasPending() )
+ return true;
+
+#if wxUSE_TIMER
+ wxUsecClock_t nextTimer;
+ if ( wxTimerScheduler::Get().GetNext(&nextTimer) &&
+ !wxMilliClockToLong(nextTimer) )
+ return true;
+#endif // wxUSE_TIMER
+
+ return false;
}
bool wxConsoleEventLoop::Dispatch()
{
- wxTheApp->ProcessPendingEvents();
- return true;
-}
+ DispatchTimeout(static_cast<unsigned long>(
+ wxFDIODispatcher::TIMEOUT_INFINITE));
-void wxConsoleEventLoop::WakeUp()
-{
- m_wakeupPipe.WakeUp();
+ return true;
}
-void wxConsoleEventLoop::OnNextIteration()
+int wxConsoleEventLoop::DispatchTimeout(unsigned long timeout)
{
- // calculate the timeout until the next timer expiration
- int timeout;
-
#if wxUSE_TIMER
+ // check if we need to decrease the timeout to account for a timer
wxUsecClock_t nextTimer;
if ( wxTimerScheduler::Get().GetNext(&nextTimer) )
{
- // timeout is in ms
- timeout = (nextTimer / 1000).ToLong();
+ unsigned long timeUntilNextTimer = wxMilliClockToLong(nextTimer / 1000);
+ if ( timeUntilNextTimer < timeout )
+ timeout = timeUntilNextTimer;
}
- else // no timers, we can block forever
#endif // wxUSE_TIMER
- {
- timeout = wxFDIODispatcher::TIMEOUT_INFINITE;
- }
- m_dispatcher->RunLoop(timeout);
+ bool hadEvent = m_dispatcher->Dispatch(timeout) > 0;
#if wxUSE_TIMER
- wxTimerScheduler::Get().NotifyExpired();
-#endif
+ if ( wxTimerScheduler::Get().NotifyExpired() )
+ hadEvent = true;
+#endif // wxUSE_TIMER
+
+ return hadEvent ? 1 : -1;
+}
+
+void wxConsoleEventLoop::WakeUp()
+{
+ m_wakeupPipe->WakeUp();
+}
+void wxConsoleEventLoop::OnNextIteration()
+{
// call the signal handlers for any signals we caught recently
wxTheApp->CheckSignal();
}
+
+wxEventLoopBase *wxConsoleAppTraits::CreateEventLoop()
+{
+ return new wxEventLoop();
+}
+
#endif // wxUSE_CONSOLE_EVENTLOOP
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