void
thread_exit (int n)
{
if (_current_fiber->thr_attached)
return;
_fiber_status (_current_fiber, DEAD);
_thread_free_attributes (_current_fiber);
if (_current_fiber == _main_thread)
exit (n);
_fiber_schedule_next ();
/* could come here using win fibers */
longjmp (_current_fiber->thr_init_context, 1);
}
void
thread_exit (int n)
{
thread_t *thr = current_thread;
volatile int is_attached = thr->thr_attached;
if (thr == _main_thread)
{
call_exit (n);
}
thr->thr_retcode = n;
thr->thr_status = DEAD;
if (is_attached)
{
thr->thr_status = TERMINATE;
goto terminate;
}
Q_LOCK ();
thread_queue_to (&_deadq, thr);
_thread_num_dead++;
do
{
int rc = pthread_cond_wait ((pthread_cond_t *) thr->thr_cv, (pthread_mutex_t*) &_q_lock->mtx_mtx);
CKRET (rc);
} while (thr->thr_status == DEAD);
Q_UNLOCK ();
if (thr->thr_status == TERMINATE)
goto terminate;
/* Jumps back into _thread_boot */
longjmp (thr->thr_init_context, 1);
failed:
thread_queue_remove (&_deadq, thr);
_thread_num_dead--;
Q_UNLOCK ();
terminate:
if (thr->thr_status == TERMINATE)
{
#ifndef OLD_PTHREADS
pthread_detach (* (pthread_t *)thr->thr_handle);
#else
pthread_detach ( (pthread_t *)thr->thr_handle);
#endif
_thread_free_attributes (thr);
dk_free ((void *) thr->thr_cv, sizeof (pthread_cond_t));
semaphore_free (thr->thr_sem);
semaphore_free (thr->thr_schedule_sem);
dk_free (thr->thr_handle, sizeof (pthread_t));
thr_free_alloc_cache (thr);
dk_free (thr, sizeof (thread_t));
}
if (!is_attached)
{
_thread_num_total--;
pthread_exit ((void *) 1L);
}
}
thread_t *
thread_create (
thread_init_func initial_function,
unsigned long stack_size,
void *initial_argument)
{
thread_t *thr;
int rc;
assert (_main_thread != NULL);
if (stack_size == 0)
stack_size = THREAD_STACK_SIZE;
#if (SIZEOF_VOID_P == 8)
stack_size *= 2;
#endif
#if defined (__x86_64 ) && defined (SOLARIS)
/*GK: the LDAP on that platform requires that */
stack_size *= 2;
#endif
#ifdef HPUX_ITANIUM64
stack_size += 8 * 8192;
#endif
stack_size = ((stack_size / 8192) + 1) * 8192;
#if defined (PTHREAD_STACK_MIN)
if (stack_size < PTHREAD_STACK_MIN)
{
stack_size = PTHREAD_STACK_MIN;
}
#endif
/* Any free threads with the right stack size? */
Q_LOCK ();
for (thr = (thread_t *) _deadq.thq_head.thr_next;
thr != (thread_t *) &_deadq.thq_head;
thr = (thread_t *) thr->thr_hdr.thr_next)
{
/* if (thr->thr_stack_size >= stack_size) */
break;
}
Q_UNLOCK ();
/* No free threads, create a new one */
if (thr == (thread_t *) &_deadq.thq_head)
{
#ifndef OLD_PTHREADS
size_t os_stack_size = stack_size;
#endif
thr = thread_alloc ();
thr->thr_initial_function = initial_function;
thr->thr_initial_argument = initial_argument;
thr->thr_stack_size = stack_size;
if (thr->thr_cv == NULL)
goto failed;
#ifdef HPUX_ITANIUM64
if (stack_size > PTHREAD_STACK_MIN)
{
size_t s, rses;
pthread_attr_getstacksize (&_thread_attr, &s);
pthread_attr_getrsestacksize_np (&_thread_attr, &rses);
log_error ("default rses=%d stack=%d : %m", rses,s);
}
#endif
#ifndef OLD_PTHREADS
# if defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
rc = pthread_attr_setstacksize (&_thread_attr, stack_size);
if (rc)
{
log_error ("Failed setting the OS thread stack size to %d : %m", stack_size);
}
# endif
#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE)
if (0 == pthread_attr_getstacksize (&_thread_attr, &os_stack_size))
{
if (os_stack_size > 4 * 8192)
stack_size = thr->thr_stack_size = ((unsigned long) os_stack_size) - 4 * 8192;
}
#endif
#ifdef HPUX_ITANIUM64
if (stack_size > PTHREAD_STACK_MIN)
{
size_t rsestack_size = stack_size / 2;
rc = pthread_attr_setrsestacksize_np (&_thread_attr, rsestack_size);
if (rc)
{
log_error ("Failed setting the OS thread 'rse' stack size to %d (plain stack size set to %d) : %m", rsestack_size, stack_size);
}
thr->thr_stack_size /= 2;
}
#endif
rc = pthread_create ((pthread_t *) thr->thr_handle, &_thread_attr,
_thread_boot, thr);
CKRET (rc);
/* rc = pthread_detach (*(pthread_t *) thr->thr_handle); */
/* CKRET (rc); */
#else /* OLD_PTHREAD */
rc = pthread_attr_setstacksize (&_thread_attr, stack_size);
CKRET (rc);
rc = pthread_create ((pthread_t *) thr->thr_handle, _thread_attr,
_thread_boot, thr);
CKRET (rc);
/* rc = pthread_detach ((pthread_t *) thr->thr_handle); */
/* CKRET (rc); */
#endif
_thread_num_total++;
#if 0
if (DO_LOG(LOG_THR))
log_info ("THRD_0 OS threads create (%i)", _thread_num_total);
#endif
thread_set_priority (thr, NORMAL_PRIORITY);
}
else
{
Q_LOCK ();
thread_queue_remove (&_deadq, thr);
_thread_num_dead--;
Q_UNLOCK ();
assert (thr->thr_status == DEAD);
/* Set new context for the thread and resume it */
thr->thr_initial_function = initial_function;
thr->thr_initial_argument = initial_argument;
thr->thr_status = RUNNABLE;
rc = pthread_cond_signal ((pthread_cond_t *) thr->thr_cv);
CKRET (rc);
/* if (DO_LOG(LOG_THR))
log_info ("THRD_3 OS threads reuse. Info threads - total (%ld) wait (%ld) dead (%ld)",
_thread_num_total, _thread_num_wait, _thread_num_dead);*/
}
return thr;
failed:
if (thr->thr_status == RUNNABLE)
{
_thread_free_attributes (thr);
dk_free (thr, sizeof (thread_t));
}
return NULL;
}
/*
* The main thread must call this function to convert itself into a thread.
*/
thread_t *
thread_initial (unsigned long stack_size)
{
int rc;
thread_t *thr = NULL;
if (_main_thread)
return _main_thread;
/*
* Initialize pthread key
*/
#ifndef OLD_PTHREADS
rc = pthread_key_create (&_key_current, NULL);
#else
rc = pthread_keycreate (&_key_current, NULL);
#endif
CKRET (rc);
/*
* Start off with a value of NULL
*/
rc = pthread_setspecific (_key_current, NULL);
CKRET (rc);
/*
* Initialize default thread/mutex attributes
*/
#ifndef OLD_PTHREADS
/* attribute for thread creation */
rc = pthread_attr_init (&_thread_attr);
CKRET (rc);
/* attribute for mutex creation */
rc = pthread_mutexattr_init (&_mutex_attr);
CKRET (rc);
#else
rc = pthread_attr_create (&_thread_attr);
CKRET (rc);
rc = pthread_mutexattr_create (&_mutex_attr);
CKRET (rc);
#endif
#if defined (PTHREAD_PROCESS_PRIVATE) && !defined(oldlinux) && !defined(__FreeBSD__)
rc = pthread_mutexattr_setpshared (&_mutex_attr, PTHREAD_PROCESS_PRIVATE);
CKRET (rc);
#endif
#if defined (MUTEX_FAST_NP) && !defined (_AIX)
rc = pthread_mutexattr_setkind_np (&_mutex_attr, MUTEX_FAST_NP);
CKRET (rc);
#endif
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
rc = pthread_mutexattr_settype (&_mutex_attr, PTHREAD_MUTEX_ADAPTIVE_NP);
CKRET (rc);
#endif
/*
* Allocate a thread structure
*/
thr = (thread_t *) dk_alloc (sizeof (thread_t));
memset (thr, 0, sizeof (thread_t));
assert (_main_thread == NULL);
_main_thread = thr;
_sched_init ();
if (stack_size == 0)
stack_size = MAIN_STACK_SIZE;
#if (SIZEOF_VOID_P == 8)
stack_size *= 2;
#endif
#if defined (__x86_64 ) && defined (SOLARIS)
/*GK: the LDAP on that platform requires that */
stack_size *= 2;
#endif
stack_size = ((stack_size / 8192) + 1) * 8192;
thr->thr_stack_size = stack_size;
thr->thr_status = RUNNING;
thr->thr_cv = _alloc_cv ();
thr->thr_sem = semaphore_allocate (0);
thr->thr_schedule_sem = semaphore_allocate (0);
if (thr->thr_cv == NULL)
goto failed;
_thread_init_attributes (thr);
thread_set_priority (thr, NORMAL_PRIORITY);
rc = pthread_setspecific (_key_current, thr);
CKRET (rc);
return thr;
failed:
if (thr)
{
_thread_free_attributes (thr);
dk_free (thr, sizeof (thread_t));
}
return NULL;
}
