ACE/examples/APG/Signals/SigAction.cpp

   1 #include "ace/OS_NS_unistd.h"
   2 #include "ace/OS_NS_stdlib.h"
   3 #include "ace/Log_Msg.h"
   4 // Listing 1 code/ch11
   5 #include "ace/Signal.h"
   6
   7 // Forward declaration.
   8 static void register_actions ();
   9
  10 int ACE_TMAIN (int, ACE_TCHAR *[])
  11 {
  12   ACE_TRACE ("::main");
  13
  14   ::register_actions ();    // Register actions to happen.
  15
  16   // This will be raised immediately.
  17   ACE_OS::kill (ACE_OS::getpid(), SIGUSR2);
  18
  19   // This will pend until the first signal is completely
  20   // handled and returns, because we masked it out
  21   // in the registerAction call.
  22   ACE_OS::kill (ACE_OS::getpid (), SIGUSR1);
  23
  24   while (ACE_OS::sleep (100) == -1)
  25     {
  26       if (errno == EINTR)
  27         continue;
  28       else
  29         ACE_OS::exit (1);
  30     }
  31   return 0;
  32 }
  33 // Listing 1
  34 #if defined (ACE_HAS_SIG_C_FUNC)
  35 extern "C" {
  36 #endif
  37 // Listing 3 code/ch11
  38 static void my_sighandler (int signo)
  39 {
  40   ACE_TRACE ("::my_sighandler");
  41
  42   ACE_OS::kill (ACE_OS::getpid (), SIGUSR1);
  43
  44   if (signo == SIGUSR1)
  45     ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Signal SIGUSR1\n")));
  46   else
  47     ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Signal SIGUSR2\n")));
  48
  49   ACE_OS::sleep (10);
  50 }
  51 #if defined (ACE_HAS_SIG_C_FUNC)
  52 }
  53 #endif
  54 // Listing 3
  55 // Listing 2 code/ch11
  56 static void register_actions ()
  57 {
  58   ACE_TRACE ("::register_actions");
  59
  60   ACE_Sig_Action sa (reinterpret_cast <ACE_SignalHandler> (my_sighandler));
  61
  62   // Make sure we specify that SIGUSR1 will be masked out
  63   // during the signal handler's execution.
  64   ACE_Sig_Set ss;
  65   ss.sig_add (SIGUSR1);
  66   sa.mask (ss);
  67
  68   // Register the same handler function for these
  69   // two signals.
  70   sa.register_action (SIGUSR1);
  71   sa.register_action (SIGUSR2);
  72 }
  73 // Listing 2