ACE/examples/APG/Processes/Process_Manager_Spawn.cpp

   1 #include "ace/OS_NS_unistd.h"
   2 #include "ace/Log_Msg.h"
   3 // Listing 0 code/ch10
   4 #include "ace/Process_Manager.h"
   5
   6 static const int NCHILDREN = 2;
   7
   8 int ACE_TMAIN (int argc, ACE_TCHAR *argv[])
   9 {
  10   if (argc > 1)     // Running as a child.
  11     {
  12       ACE_OS::sleep (10);
  13     }
  14   else             // Running as a parent.
  15     {
  16       // Get the processwide process manager.
  17       ACE_Process_Manager* pm = ACE_Process_Manager::instance ();
  18
  19       // Specify the options for the new processes
  20       // to be spawned.
  21       ACE_Process_Options options;
  22       options.command_line (ACE_TEXT ("%s a"), argv[0]);
  23
  24       // Spawn two child processes.
  25       pid_t pids[NCHILDREN];
  26       pm->spawn_n (NCHILDREN, options, pids);
  27
  28       // Destroy the first child.
  29       pm->terminate (pids[0]);
  30
  31       // Wait for the child we just terminated.
  32       ACE_exitcode status;
  33       pm->wait (pids[0], &status);
  34
  35       // Get the results of the termination.
  36
  37 #if !defined(ACE_WIN32)
  38       if (WIFSIGNALED (status) != 0)
  39         ACE_DEBUG ((LM_DEBUG,
  40                     ACE_TEXT ("%d died because of a signal ")
  41                     ACE_TEXT ("of type %d\n"),
  42                     pids[0], WTERMSIG (status)));
  43 #else
  44       ACE_DEBUG
  45         ((LM_DEBUG,
  46           ACE_TEXT ("The process terminated with exit code %d\n"),
  47           status));
  48 #endif /*ACE_WIN32*/
  49
  50       // Wait for all (only one left) of the
  51       // children to exit.
  52       pm->wait (0);
  53     }
  54
  55   return 0;
  56 }
  57 // Listing 0