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// $Id$
// ============================================================================
//
// = LIBRARY
// tests
//
// = FILENAME
// Task_Test.cpp
//
// = DESCRIPTION
// This test program illustrates how the ACE barrier
// synchronization mechanisms work in conjunction with the
// <ACE_Task> and the <ACE_Thread_Manager>. This also illustrates
// how the <ACE_Thread_Hook> mechanism works.
//
// = AUTHOR
// Prashant Jain <pjain@cs.wustl.edu> and
// Douglas C. Schmidt <schmidt@cs.wustl.edu>
//
// ============================================================================
#include "test_config.h"
#include "ace/Task.h"
ACE_RCSID(tests, Task_Test, "$Id$")
#if defined (ACE_HAS_THREADS)
class My_Thread_Hook : public ACE_Thread_Hook
{
public:
virtual void *start (ACE_THR_FUNC func,
void *arg);
};
class Barrier_Task : public ACE_Task<ACE_MT_SYNCH>
{
public:
Barrier_Task (ACE_Thread_Manager *thr_mgr,
int n_threads,
int n_iterations);
virtual int svc (void);
// Iterate <n_iterations> time printing off a message and "waiting"
// for all other threads to complete this iteration.
private:
ACE_Barrier barrier_;
// Reference to the tester barrier. This controls each iteration of
// the tester function running in every thread.
int n_iterations_;
// Number of iterations to run.
};
Barrier_Task::Barrier_Task (ACE_Thread_Manager *thr_mgr,
int n_threads,
int n_iterations)
: ACE_Task<ACE_MT_SYNCH> (thr_mgr),
barrier_ (n_threads),
n_iterations_ (n_iterations)
{
// Create worker threads.
if (this->activate (THR_NEW_LWP, n_threads) == -1)
ACE_ERROR ((LM_ERROR, ASYS_TEXT ("%p\n"), ASYS_TEXT ("activate failed")));
}
void *
My_Thread_Hook::start (ACE_THR_FUNC func,
void *arg)
{
ACE_DEBUG ((LM_DEBUG,
"(%t) starting the thread!\n"));
return (func) (arg);
}
// Iterate <n_iterations> time printing off a message and "waiting"
// for all other threads to complete this iteration.
int
Barrier_Task::svc (void)
{
for (int iterations = 1;
iterations <= this->n_iterations_;
iterations++)
{
ACE_DEBUG ((LM_DEBUG,
ASYS_TEXT ("(%t) in iteration %d\n"),
iterations));
// Block until all other threads have waited, then continue.
this->barrier_.wait ();
}
// Note that the <ACE_Task::svc_run> method automatically removes us
// from the Thread_Manager when the thread exits.
return 0;
}
#endif /* ACE_HAS_THREADS */
int
main (int, ASYS_TCHAR *[])
{
ACE_START_TEST (ASYS_TEXT ("Task_Test"));
#if defined (ACE_HAS_THREADS)
// Set the thread hook!
ACE_Thread_Hook::thread_hook (new My_Thread_Hook);
int n_threads = ACE_MAX_THREADS;
int n_iterations = ACE_MAX_ITERATIONS;
Barrier_Task barrier_task (ACE_Thread_Manager::instance (),
n_threads,
n_iterations);
ACE_Thread_Manager::instance ()->wait ();
// Cleanup the thread hook so it doesn't leak.
delete ACE_Thread_Hook::thread_hook ();
#else
ACE_ERROR ((LM_INFO,
ASYS_TEXT ("threads not supported on this platform\n")));
#endif /* ACE_HAS_THREADS */
ACE_END_TEST;
return 0;
}
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