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// Test out the group management mechanisms provided by the
// ACE_Thread_Manager, including the group signal handling, group
// suspension and resumption, and cooperative thread cancellation
// mechanisms.
#include "ace/OS_NS_unistd.h"
#include "ace/OS_main.h"
#include "ace/Service_Config.h"
#include "ace/Thread_Manager.h"
#include "ace/Signal.h"
#if defined (ACE_HAS_THREADS)
extern "C" void
handler (int signum)
{
ACE_DEBUG ((LM_DEBUG, "(%t) received signal %d\n", signum));
}
static void *
worker (intptr_t iterations)
{
for (intptr_t i = 0; i < iterations; i++)
{
if ((i % 1000) == 0)
{
ACE_DEBUG ((LM_DEBUG,
"(%t) checking cancellation before iteration %d!\n",
i));
if (ACE_Thread_Manager::instance ()->testcancel (ACE_Thread::self ()) != 0)
{
ACE_DEBUG ((LM_DEBUG,
"(%t) has been cancelled before iteration %d!\n",
i));
break;
}
}
}
// Destructor removes thread from Thread_Manager.
return 0;
}
static const int DEFAULT_THREADS = ACE_DEFAULT_THREADS;
static const intptr_t DEFAULT_ITERATIONS = 100000;
int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
ACE_Service_Config daemon;
daemon.open (argv[0]);
// Register a signal handler.
ACE_Sig_Action sa ((ACE_SignalHandler) handler, SIGINT);
ACE_UNUSED_ARG (sa);
int n_threads = argc > 1 ? ACE_OS::atoi (argv[1]) : DEFAULT_THREADS;
intptr_t n_iterations =
argc > 2 ? ACE_OS::atoi (argv[2]) : DEFAULT_ITERATIONS;
ACE_Thread_Manager *thr_mgr = ACE_Thread_Manager::instance ();
int grp_id = thr_mgr->spawn_n (n_threads,
ACE_THR_FUNC (worker),
reinterpret_cast<void *> (n_iterations),
THR_NEW_LWP | THR_DETACHED);
// Wait for 1 second and then suspend every thread in the group.
ACE_OS::sleep (1);
ACE_DEBUG ((LM_DEBUG, "(%t) suspending group\n"));
if (thr_mgr->suspend_grp (grp_id) == -1)
ACE_ERROR ((LM_DEBUG, "(%t) %p\n", "suspend_grp"));
// Wait for 1 more second and then resume every thread in the
// group.
ACE_OS::sleep (ACE_Time_Value (1));
ACE_DEBUG ((LM_DEBUG, "(%t) resuming group\n"));
if (thr_mgr->resume_grp (grp_id) == -1)
ACE_ERROR ((LM_DEBUG, "(%t) %p\n", "resume_grp"));
// Wait for 1 more second and then send a SIGINT to every thread in
// the group.
ACE_OS::sleep (ACE_Time_Value (1));
ACE_DEBUG ((LM_DEBUG, "(%t) signaling group\n"));
if (thr_mgr->kill_grp (grp_id, SIGINT) == -1)
ACE_ERROR ((LM_DEBUG, "(%t) %p\n", "kill_grp"));
// Wait for 1 more second and then cancel all the threads.
ACE_OS::sleep (ACE_Time_Value (1));
ACE_DEBUG ((LM_DEBUG, "(%t) cancelling group\n"));
if (thr_mgr->cancel_grp (grp_id) == -1)
ACE_ERROR ((LM_DEBUG, "(%t) %p\n", "cancel_grp"));
// Perform a barrier wait until all the threads have shut down.
thr_mgr->wait ();
return 0;
}
#else
int
ACE_TMAIN (int, ACE_TCHAR *[])
{
ACE_ERROR_RETURN ((LM_ERROR, "threads not supported on this platform\n"), -1);
}
#endif /* ACE_HAS_THREADS */
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