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 wxAppConsoleUnix::Initialize(int& argc, wxChar** argv)
  19 {
  20     if ( !wxAppConsole::Initialize(argc,argv) )
  21         return false;
  22
  23     if ( !m_mainLoop->IsOk() )
  24         return false;
  25
  26     sigemptyset(&m_signalsCaught);
  27
  28     return true;
  29 }
  30
  31 void wxAppConsoleUnix::HandleSignal(int signal)
  32 {
  33     wxAppConsoleUnix * const app = wxTheApp;
  34     if ( !app )
  35         return;
  36
  37     sigaddset(&(app->m_signalsCaught), signal);
  38     app->WakeUpIdle();
  39 }
  40
  41 void wxAppConsoleUnix::CheckSignal()
  42 {
  43     for ( SignalHandlerHash::iterator it = m_signalHandlerHash.begin();
  44           it != m_signalHandlerHash.end();
  45           ++it )
  46     {
  47         int sig = it->first;
  48         if ( sigismember(&m_signalsCaught, sig) )
  49         {
  50             sigdelset(&m_signalsCaught, sig);
  51             (it->second)(sig);
  52         }
  53     }
  54 }
  55
  56 bool wxAppConsoleUnix::SetSignalHandler(int signal, SignalHandler handler)
  57 {
  58     const bool install = handler != SIG_DFL && handler != SIG_IGN;
  59
  60     struct sigaction sa;
  61     memset(&sa, 0, sizeof(sa));
  62     sa.sa_handler = &wxAppConsoleUnix::HandleSignal;
  63     sa.sa_flags = SA_RESTART;
  64     int res = sigaction(signal, &sa, 0);
  65     if ( res != 0 )
  66     {
  67         wxLogSysError(_("Failed to install signal handler"));
  68         return false;
  69     }
  70
  71     if ( install )
  72         m_signalHandlerHash[signal] = handler;
  73     else
  74         m_signalHandlerHash.erase(signal);
  75
  76     return true;
  77 }