X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b5ef33b2aed3f6aea3b7b71189a93985bfda3b3a..89e5d5bbc49408a3bceb9b8be7241c54ea428e74:/src/common/selectdispatcher.cpp diff --git a/src/common/selectdispatcher.cpp b/src/common/selectdispatcher.cpp index adfc2eba62..fd0a26938c 100644 --- a/src/common/selectdispatcher.cpp +++ b/src/common/selectdispatcher.cpp @@ -5,7 +5,7 @@ // Created: December 2006 // RCS-ID: $Id$ // Copyright: (c) 2006 Lukasz Michalski -// License: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -19,9 +19,13 @@ // for compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" +#ifdef __BORLANDC__ + #pragma hdrstop +#endif + +#if wxUSE_SELECT_DISPATCHER + #include "wx/private/selectdispatcher.h" -#include "wx/module.h" -#include "wx/timer.h" #include "wx/unix/private.h" #ifndef WX_PRECOMP @@ -30,10 +34,6 @@ #include "wx/intl.h" #endif -#ifdef HAVE_SYS_SELECT_H - #include -#endif - #include #define wxSelectDispatcher_Trace wxT("selectdispatcher") @@ -79,7 +79,7 @@ bool wxSelectSets::HasFD(int fd) const { for ( int n = 0; n < Max; n++ ) { - if ( wxFD_ISSET(fd, &m_fds[n]) ) + if ( wxFD_ISSET(fd, (fd_set*) &m_fds[n]) ) return true; } @@ -88,21 +88,17 @@ bool wxSelectSets::HasFD(int fd) const bool wxSelectSets::SetFD(int fd, int flags) { - wxCHECK_MSG( fd >= 0, false, _T("invalid descriptor") ); + wxCHECK_MSG( fd >= 0, false, wxT("invalid descriptor") ); for ( int n = 0; n < Max; n++ ) { if ( flags & ms_flags[n] ) { wxFD_SET(fd, &m_fds[n]); - wxLogTrace(wxSelectDispatcher_Trace, - _T("Registered fd %d for %s events"), fd, ms_names[n]); } - else if ( wxFD_ISSET(fd, &m_fds[n]) ) + else if ( wxFD_ISSET(fd, (fd_set*) &m_fds[n]) ) { wxFD_CLR(fd, &m_fds[n]); - wxLogTrace(wxSelectDispatcher_Trace, - _T("Unregistered fd %d from %s events"), fd, ms_names[n]); } } @@ -114,53 +110,31 @@ int wxSelectSets::Select(int nfds, struct timeval *tv) return select(nfds, &m_fds[Read], &m_fds[Write], &m_fds[Except], tv); } -void wxSelectSets::Handle(int fd, wxFDIOHandler& handler) const +bool wxSelectSets::Handle(int fd, wxFDIOHandler& handler) const { for ( int n = 0; n < Max; n++ ) { - if ( wxFD_ISSET(fd, &m_fds[n]) ) + if ( wxFD_ISSET(fd, (fd_set*) &m_fds[n]) ) { wxLogTrace(wxSelectDispatcher_Trace, - _T("Got %s event on fd %d"), ms_names[n], fd); + wxT("Got %s event on fd %d"), ms_names[n], fd); (handler.*ms_handlers[n])(); + // callback can modify sets and destroy handler + // this forces that one event can be processed at one time + return true; } } + + return false; } // ---------------------------------------------------------------------------- // wxSelectDispatcher // ---------------------------------------------------------------------------- -static wxSelectDispatcher *gs_selectDispatcher = NULL; - -/* static */ -wxSelectDispatcher *wxSelectDispatcher::Get() -{ - if ( !gs_selectDispatcher ) - { - // the dispatcher should be only created from one thread so it should - // be ok to use a global without any protection here - gs_selectDispatcher = new wxSelectDispatcher; - } - - return gs_selectDispatcher; -} - -/* static */ -void wxSelectDispatcher::DispatchPending() -{ - if ( gs_selectDispatcher ) - gs_selectDispatcher->RunLoop(0); -} - -wxSelectDispatcher::wxSelectDispatcher() -{ - m_maxFD = -1; -} - bool wxSelectDispatcher::RegisterFD(int fd, wxFDIOHandler *handler, int flags) { - if ( !wxFDIODispatcher::RegisterFD(fd, handler, flags) ) + if ( !wxMappedFDIODispatcher::RegisterFD(fd, handler, flags) ) return false; if ( !m_sets.SetFD(fd, flags) ) @@ -169,24 +143,29 @@ bool wxSelectDispatcher::RegisterFD(int fd, wxFDIOHandler *handler, int flags) if ( fd > m_maxFD ) m_maxFD = fd; + wxLogTrace(wxSelectDispatcher_Trace, + wxT("Registered fd %d: input:%d, output:%d, exceptional:%d"), fd, (flags & wxFDIO_INPUT) == wxFDIO_INPUT, (flags & wxFDIO_OUTPUT), (flags & wxFDIO_EXCEPTION) == wxFDIO_EXCEPTION); return true; } bool wxSelectDispatcher::ModifyFD(int fd, wxFDIOHandler *handler, int flags) { - if ( !wxFDIODispatcher::ModifyFD(fd, handler, flags) ) + if ( !wxMappedFDIODispatcher::ModifyFD(fd, handler, flags) ) return false; - wxASSERT_MSG( fd <= m_maxFD, _T("logic error: registered fd > m_maxFD?") ); + wxASSERT_MSG( fd <= m_maxFD, wxT("logic error: registered fd > m_maxFD?") ); + wxLogTrace(wxSelectDispatcher_Trace, + wxT("Modified fd %d: input:%d, output:%d, exceptional:%d"), fd, (flags & wxFDIO_INPUT) == wxFDIO_INPUT, (flags & wxFDIO_OUTPUT) == wxFDIO_OUTPUT, (flags & wxFDIO_EXCEPTION) == wxFDIO_EXCEPTION); return m_sets.SetFD(fd, flags); } -wxFDIOHandler *wxSelectDispatcher::UnregisterFD(int fd, int flags) +bool wxSelectDispatcher::UnregisterFD(int fd) { - wxFDIOHandler * const handler = wxFDIODispatcher::UnregisterFD(fd, flags); + m_sets.ClearFD(fd); - m_sets.ClearFD(fd, flags); + if ( !wxMappedFDIODispatcher::UnregisterFD(fd) ) + return false; // remove the handler if we don't need it any more if ( !m_sets.HasFD(fd) ) @@ -200,16 +179,21 @@ wxFDIOHandler *wxSelectDispatcher::UnregisterFD(int fd, int flags) ++it ) { if ( it->first > m_maxFD ) + { m_maxFD = it->first; + } } } } - return handler; + wxLogTrace(wxSelectDispatcher_Trace, + wxT("Removed fd %d, current max: %d"), fd, m_maxFD); + return true; } -void wxSelectDispatcher::ProcessSets(const wxSelectSets& sets) +int wxSelectDispatcher::ProcessSets(const wxSelectSets& sets) { + int numEvents = 0; for ( int fd = 0; fd <= m_maxFD; fd++ ) { if ( !sets.HasFD(fd) ) @@ -218,77 +202,64 @@ void wxSelectDispatcher::ProcessSets(const wxSelectSets& sets) wxFDIOHandler * const handler = FindHandler(fd); if ( !handler ) { - wxFAIL_MSG( _T("NULL handler in wxSelectDispatcher?") ); + wxFAIL_MSG( wxT("NULL handler in wxSelectDispatcher?") ); continue; } - sets.Handle(fd, *handler); + if ( sets.Handle(fd, *handler) ) + numEvents++; } + + return numEvents; } -void wxSelectDispatcher::RunLoop(int timeout) +int wxSelectDispatcher::DoSelect(wxSelectSets& sets, int timeout) const { struct timeval tv, - *ptv = NULL; + *ptv; if ( timeout != TIMEOUT_INFINITE ) { ptv = &tv; - tv.tv_sec = 0; - tv.tv_usec = timeout*1000; + tv.tv_sec = timeout / 1000; + tv.tv_usec = (timeout % 1000)*1000; } - - for ( ;; ) + else // no timeout { - wxSelectSets sets = m_sets; - - wxStopWatch sw; - if ( ptv && timeout ) - sw.Start(ptv->tv_usec/10); - - const int ret = sets.Select(m_maxFD + 1, ptv); - switch ( ret ) - { - case -1: - // continue if we were interrupted by a signal, else bail out - if ( errno != EINTR ) - { - wxLogSysError(_("Failed to monitor I/O channels")); - return; - } - break; - - case 0: - // timeout expired without anything happening - return; + ptv = NULL; + } - default: - ProcessSets(sets); - } + int ret = sets.Select(m_maxFD + 1, ptv); - if ( ptv ) - { - timeout -= sw.Time(); - if ( timeout <= 0 ) - break; + // TODO: we need to restart select() in this case but for now just return + // as if timeout expired + if ( ret == -1 && errno == EINTR ) + ret = 0; - ptv->tv_usec = timeout*1000; - } - } + return ret; } -// ---------------------------------------------------------------------------- -// wxSelectDispatcherModule -// ---------------------------------------------------------------------------- +bool wxSelectDispatcher::HasPending() const +{ + wxSelectSets sets(m_sets); + return DoSelect(sets, 0) > 0; +} -class wxSelectDispatcherModule : public wxModule +int wxSelectDispatcher::Dispatch(int timeout) { -public: - virtual bool OnInit() { return true; } - virtual void OnExit() { wxDELETE(gs_selectDispatcher); } + wxSelectSets sets(m_sets); + switch ( DoSelect(sets, timeout) ) + { + case -1: + wxLogSysError(_("Failed to monitor I/O channels")); + return -1; -private: - DECLARE_DYNAMIC_CLASS(wxSelectDispatcherModule) -}; + case 0: + // timeout expired without anything happening + return 0; -IMPLEMENT_DYNAMIC_CLASS(wxSelectDispatcherModule, wxModule) + default: + return ProcessSets(sets); + } +} +#endif // wxUSE_SELECT_DISPATCHER