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// $Id$
// ============================================================================
//
// = LIBRARY
// tests
//
// = FILENAME
// Barrier_Test.cpp
//
// = DESCRIPTION
// This program illustrates how the ACE barrier synchronization
// mechanisms work.
//
// = AUTHOR
// Prashant Jain and Doug Schmidt
//
// ============================================================================
#include "test_config.h"
#include "ace/Synch.h"
#include "ace/Thread_Manager.h"
#if defined (ACE_HAS_THREADS)
struct Tester_Args
// = TITLE
// These arguments are passed into each test thread.
{
Tester_Args (ACE_Barrier &tb, int i)
: tester_barrier_ (tb),
n_iterations_ (i) {}
ACE_Barrier &tester_barrier_;
// Reference to the tester barrier. This controls each miteration
// of the tester function running in every thread.
int n_iterations_;
// Number of iterations to run.
};
// Iterate <n_iterations> time printing off a message and "waiting"
// for all other threads to complete this iteration.
static void *
tester (Tester_Args *args)
{
#if defined (VXWORKS)
ACE_DEBUG ((LM_DEBUG, ASYS_TEXT ("(%P|%t) %s stack size is %u\n"),
ACE_OS::thr_self (), ACE_OS::thr_min_stack ()));
#endif /* VXWORKS */
for (int iterations = 1;
iterations <= args->n_iterations_;
iterations++)
{
ACE_DEBUG ((LM_DEBUG, ASYS_TEXT ("(%t) in iteration %d\n"),
iterations));
// Block until all other threads have waited, then continue.
args->tester_barrier_.wait ();
}
return 0;
}
#endif /* ACE_HAS_THREADS */
int
main (int, ASYS_TCHAR *[])
{
ACE_START_TEST (ASYS_TEXT ("Barrier_Test"));
#if defined (ACE_HAS_THREADS)
int n_threads = ACE_MAX_THREADS;
int n_iterations = ACE_MAX_ITERATIONS;
ACE_Barrier tester_barrier (n_threads);
Tester_Args args (tester_barrier, n_iterations);
#if defined (VXWORKS)
// Assign thread (VxWorks task) names to test that feature.
ACE_thread_t *thread_name;
ACE_NEW_RETURN (thread_name, ACE_thread_t[n_threads], -1);
// And test the ability to specify stack size.
size_t *stack_size;
ACE_NEW_RETURN (stack_size, size_t[n_threads], -1);
int i;
for (i = 0; i < n_threads; ++i)
{
ACE_NEW_RETURN (thread_name[i], char[32], -1);
ACE_OS::sprintf (thread_name[i], ASYS_TEXT ("thread%u"), i);
stack_size[i] = 40000;
}
#endif /* VXWORKS */
for (size_t iteration_count = 0;
iteration_count < ACE_MAX_ITERATIONS;
iteration_count++)
{
ACE_DEBUG ((LM_DEBUG, ASYS_TEXT ("starting iteration %d\n"),
iteration_count));
if (ACE_Thread_Manager::instance ()->spawn_n
(
#if defined (VXWORKS)
thread_name,
#endif /* VXWORKS */
n_threads,
(ACE_THR_FUNC) tester,
(void *) &args,
THR_NEW_LWP | THR_JOINABLE
#if defined (VXWORKS)
, ACE_DEFAULT_THREAD_PRIORITY
, -1
, 0
, stack_size
#endif /* VXWORKS */
) == -1)
ACE_ERROR_RETURN ((LM_ERROR, ASYS_TEXT ("%p\n"),
ASYS_TEXT ("spawn_n")), 1);
ACE_Thread_Manager::instance ()->wait ();
}
#if defined (VXWORKS)
for (i = 0; i < n_threads; ++i)
{
delete [] thread_name[i];
}
delete [] thread_name;
delete [] stack_size;
#endif /* VXWORKS */
ACE_DEBUG ((LM_DEBUG, ASYS_TEXT ("test done\n")));
#else
ACE_ERROR ((LM_ERROR,
ASYS_TEXT ("threads not supported on this platform\n")));
#endif /* ACE_HAS_THREADS */
ACE_END_TEST;
return 0;
}
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