int ACE_TMAIN (int, ACE_TCHAR *[])
{
// Create locked
ACE_Process_Semaphore s (0, ACE_TEXT ("AceTest"));
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Worker is going to acquire semaphore\n")));
s.acquire ();
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Worker has acquired semaphore\n")));
// Do some init stuff. Simulated by a sleep...
ACE_OS::sleep(10);
s.release();
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Worker released semaphore\n")));
// Do the work...
ACE_OS::sleep(5);
return 0;
}
int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
const ACE_TCHAR *name = argc == 1 ? ACE_TEXT("hello") : argv[1];
int iterations = argc > 2 ? ACE_OS::atoi (argv[2]) : 100;
ACE_Process_Semaphore pm (1, name);
ACE_Sig_Action sa ((ACE_SignalHandler) handler, SIGINT);
ACE_UNUSED_ARG (sa);
for (int i = 0; i < iterations && !done; i++)
{
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = acquiring\n"));
if (pm.acquire () == -1)
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = %p\n", "acquire failed"));
else
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = acquired\n"));
ACE_OS::sleep (3);
if (pm.release () == -1)
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = %p\n", "release failed"));
else
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = released\n"));
if (pm.tryacquire () == -1)
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = %p\n", "tryacquire failed"));
else
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = tryacquire\n"));
if (pm.release () == -1)
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = %p\n", "release failed"));
else
ACE_DEBUG ((LM_DEBUG, "(%P|%t) = released\n"));
}
if (argc > 2)
pm.remove ();
return 0;
}
// Spawns the process, and waits for it to finish booting.
// Then uses bind_to_naming_service, get_stream_endpoint, and get_vdev
// to get the object references to the various objects created in the
// child
int
TAO_AV_Endpoint_Process_Strategy::activate (void)
{
ACE_Process process;
// Create a new process to contain this endpoint
this->pid_ = process.spawn (*this->process_options_);
// Process creation failed
if (this->pid_ == -1)
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"(%P|%t) ACE_Process:: spawn failed: %p\n",
"spawn"),
-1);
// Create a unique semaphore name, using my hostname, and pid.
ACE_TCHAR sem_str [BUFSIZ];
// create a unique semaphore name
ACE_OS::sprintf (sem_str,
ACE_TEXT("%s:%s:%ld"),
"TAO_AV_Process_Semaphore",
this->host_,
static_cast<long int> (this->pid_));
ORBSVCS_DEBUG ((LM_DEBUG,
"(%P|%t) semaphore is %s\n",
sem_str));
// Create the semaphore
ACE_Process_Semaphore semaphore (0, // 0 means that the
// semaphore is locked initially
sem_str);
// wait until the child finishes booting
while (1)
{
if (semaphore.acquire () == -1)
{
// See if my child process is still alive -- if not, return an error
if (ACE_OS::kill (this->pid_,
0) == -1)
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"(%P|%t) Process_Strategy: Process being waited on died unexpectedly.\n"),
-1);
// if we were not interrupted due to a EINTR, break
if (errno != EINTR)
break;
}
else
break;
}
// The job of the semaphore is done, remove it.
if (semaphore.remove () == -1)
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"(%P|%t) semaphore remove failed: %p\n",
"remove"),
-1);
try
{
// Get ourselves a Naming service
this->bind_to_naming_service ();
// Get the stream endpoint created by the child from the naming service
this->get_stream_endpoint ();
// Get the Vdev created by the child from the naming service
this->get_vdev ();
}
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception (
"TAO_AV_Endpoint_Process_Strategy::activate");
return -1;
}
return 0;
}