src/unix/appunix.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/unix/appunix.cpp
   3 // Purpose:     wxAppConsole with wxMainLoop implementation
   4 // Author:      Lukasz Michalski
   5 // Created:     28/01/2005
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) Lukasz Michalski
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/app.h"
  12 #include "wx/log.h"
  13 #include "wx/evtloop.h"
  14
  15 #include <signal.h>
  16 #include <unistd.h>
  17
  18 bool wxAppConsole::Initialize(int& argc, wxChar** argv)
  19 {
  20     if ( !wxAppConsoleBase::Initialize(argc,argv) )
  21         return false;
  22
  23     sigemptyset(&m_signalsCaught);
  24
  25     return true;
  26 }
  27
  28 void wxAppConsole::HandleSignal(int signal)
  29 {
  30     wxAppConsole * const app = wxTheApp;
  31     if ( !app )
  32         return;
  33
  34     sigaddset(&(app->m_signalsCaught), signal);
  35     app->WakeUpIdle();
  36 }
  37
  38 void wxAppConsole::CheckSignal()
  39 {
  40     for ( SignalHandlerHash::iterator it = m_signalHandlerHash.begin();
  41           it != m_signalHandlerHash.end();
  42           ++it )
  43     {
  44         int sig = it->first;
  45         if ( sigismember(&m_signalsCaught, sig) )
  46         {
  47             sigdelset(&m_signalsCaught, sig);
  48             (it->second)(sig);
  49         }
  50     }
  51 }
  52
  53 bool wxAppConsole::SetSignalHandler(int signal, SignalHandler handler)
  54 {
  55     const bool install = handler != SIG_DFL && handler != SIG_IGN;
  56
  57     struct sigaction sa;
  58     memset(&sa, 0, sizeof(sa));
  59     sa.sa_handler = &wxAppConsole::HandleSignal;
  60     sa.sa_flags = SA_RESTART;
  61     int res = sigaction(signal, &sa, 0);
  62     if ( res != 0 )
  63     {
  64         wxLogSysError(_("Failed to install signal handler"));
  65         return false;
  66     }
  67
  68     if ( install )
  69         m_signalHandlerHash[signal] = handler;
  70     else
  71         m_signalHandlerHash.erase(signal);
  72
  73     return true;
  74 }
  75