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// $Id$
// ============================================================================
//
// = LIBRARY
// tests
//
// = FILENAME
// Thread_Manager_Test.cpp
//
// = DESCRIPTION
// This program tests the group management mechanisms provided by
// the <ACE_Thread_Manager>, including the group signal handling,
// group suspension and resumption, and cooperative thread
// cancellation mechanisms.
//
// = AUTHOR
// Prashant Jain and Doug C. Schmidt
//
// ============================================================================
#include "ace/Thread_Manager.h"
#include "ace/Signal.h"
#include "test_config.h"
#if defined (ACE_HAS_THREADS)
class Signal_Catcher
// = TITLE
// Keeps track of whether a thread has been signaled.
{
public:
Signal_Catcher (void): signaled_ (0) {}
sig_atomic_t signaled (void)
{
return this->signaled_;
}
void signaled (sig_atomic_t s)
{
this->signaled_ = s;
}
private:
sig_atomic_t signaled_;
};
// Each thread keeps track of whether it has been signaled within a
// separate TSS entry.
// See comment below about why it's dynamically allocated.
static ACE_TSS<Signal_Catcher> *signal_catcher;
extern "C" void
handler (int signum)
{
ACE_DEBUG ((LM_DEBUG, "(%t) received signal %d, signaled = %d\n",
signum, (*signal_catcher)->signaled ()));
(*signal_catcher)->signaled (1);
}
static void *
worker (int iterations)
{
ACE_Thread_Manager *thr_mgr = ACE_Thread_Manager::instance ();
for (int i = 0; i < iterations; i++)
{
if ((i % 1000) == 0)
{
#if !defined (ACE_LACKS_UNIX_SIGNALS)
if ((*signal_catcher)->signaled () > 0
// Only test for cancellation after we've been signaled, to
// avoid race conditions for suspend() and resume().
&& thr_mgr->testcancel (ACE_Thread::self ()) != 0)
{
ACE_DEBUG ((LM_DEBUG,
"(%t) has been cancelled before iteration %d!\n",
i));
break;
}
#else
ACE_UNUSED_ARG (thr_mgr);
#endif /* ACE_LACKS_UNIX_SIGNALS */
ACE_OS::sleep (1);
}
}
// Destructor removes thread from Thread_Manager.
return 0;
}
static const int DEFAULT_THREADS = ACE_MAX_THREADS;
static const int DEFAULT_ITERATIONS = 100000;
#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class ACE_TSS<Signal_Catcher>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate ACE_TSS<Signal_Catcher>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
#endif /* ACE_HAS_THREADS */
int
main (int, char *[])
{
ACE_START_TEST ("Thread_Manager_Test");
#if defined (ACE_HAS_THREADS)
// Dynamically allocate signal_catcher so that we can control when
// it gets deleted. Specifically, we need to delete it before
// the main thread's TSS is cleaned up.
ACE_NEW_RETURN (signal_catcher, ACE_TSS<Signal_Catcher>, 1);
// Register a signal handler.
ACE_Sig_Action sa ((ACE_SignalHandler) handler, SIGINT);
ACE_UNUSED_ARG (sa);
int n_threads = DEFAULT_THREADS;
int n_iterations = DEFAULT_ITERATIONS;
ACE_Thread_Manager *thr_mgr = ACE_Thread_Manager::instance ();
int grp_id = thr_mgr->spawn_n (n_threads,
ACE_THR_FUNC (worker),
(void *) n_iterations,
THR_BOUND | 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 ();
delete signal_catcher;
#else
ACE_ERROR ((LM_ERROR, "threads not supported on this platform\n"));
#endif /* ACE_HAS_THREADS */
ACE_END_TEST;
return 0;
}
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