X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/af57c51ab758ad9810ea5bbb3703341cd5f367b1..88ff049184c77fd73b60c01f4f831860d2ec5cef:/src/common/selectdispatcher.cpp diff --git a/src/common/selectdispatcher.cpp b/src/common/selectdispatcher.cpp index 02c95710b7..db763eca32 100644 --- a/src/common/selectdispatcher.cpp +++ b/src/common/selectdispatcher.cpp @@ -3,9 +3,8 @@ // Purpose: implements dispatcher for select() call // Author: Lukasz Michalski and Vadim Zeitlin // Created: December 2006 -// RCS-ID: $Id$ // Copyright: (c) 2006 Lukasz Michalski -// License: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -19,11 +18,13 @@ // 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 @@ -32,10 +33,6 @@ #include "wx/intl.h" #endif -#ifdef HAVE_SYS_SELECT_H - #include -#endif - #include #define wxSelectDispatcher_Trace wxT("selectdispatcher") @@ -90,21 +87,17 @@ 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, (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]); } } @@ -116,50 +109,28 @@ 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, (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 ( !wxMappedFDIODispatcher::RegisterFD(fd, handler, flags) ) @@ -171,6 +142,8 @@ 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; } @@ -179,8 +152,10 @@ bool wxSelectDispatcher::ModifyFD(int fd, wxFDIOHandler *handler, int 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); } @@ -203,16 +178,21 @@ bool wxSelectDispatcher::UnregisterFD(int fd) ++it ) { if ( it->first > m_maxFD ) + { m_maxFD = it->first; + } } } } + 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) ) @@ -221,78 +201,64 @@ 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