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// $Id$
#define ACE_BUILD_DLL
#include "ace/Timer_Queue_Adapters.h"
#if !defined (ACE_TIMER_QUEUE_ADAPTERS_C)
#define ACE_TIMER_QUEUE_ADAPTERS_C
#if !defined (__ACE_INLINE__)
#include "ace/Timer_Queue_Adapters.i"
#endif /* __ACE_INLINE__ */
template <class TQ> TQ &
ACE_Async_Timer_Queue_Adapter<TQ>::timer_queue (void)
{
return this->timer_queue_;
}
template <class TQ> int
ACE_Async_Timer_Queue_Adapter<TQ>::cancel (long timer_id,
const void **act)
{
// Block designated signals.
ACE_Sig_Guard sg (&this->mask_);
ACE_UNUSED_ARG (sg);
return this->timer_queue_.cancel (timer_id, act);
}
template <class TQ> int
ACE_Async_Timer_Queue_Adapter<TQ>::expire (void)
{
// Block designated signals.
ACE_Sig_Guard sg (&this->mask_);
ACE_UNUSED_ARG (sg);
return this->timer_queue_.expire ();
}
template <class TQ> int
ACE_Async_Timer_Queue_Adapter<TQ>::schedule_ualarm (void)
{
ACE_Time_Value tv = this->timer_queue_.earliest_time ()
- ACE_OS::gettimeofday ();
// Beware of negative times and zero times (which cause problems for
// ualarm()).
if (tv < ACE_Time_Value::zero)
tv = ACE_Time_Value (0, 1);
// @@ This code should be clever enough to avoid updating the
// ualarm() if we haven't actually changed the earliest time.
// Schedule a new timer.
ACE_OS::ualarm (tv);
return 0;
}
template <class TQ> long
ACE_Async_Timer_Queue_Adapter<TQ>::schedule (ACE_Event_Handler *eh,
const void *act,
const ACE_Time_Value &delay,
const ACE_Time_Value &interval)
{
ACE_UNUSED_ARG (act);
ACE_UNUSED_ARG (interval);
// Block designated signals.
ACE_Sig_Guard sg (&this->mask_);
ACE_UNUSED_ARG (sg);
// @@ We still need to implement interval timers...
long tid = this->timer_queue_.schedule (eh, 0, delay);
if (tid == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "schedule_timer"), -1);
return this->schedule_ualarm ();
}
template <class TQ>
ACE_Async_Timer_Queue_Adapter<TQ>::ACE_Async_Timer_Queue_Adapter (ACE_Sig_Set *mask)
// If <mask> == 0, block *all* signals when the SIGARLM handler is
// running, else just block those in the mask.
: mask_ (mask)
{
// The following code is necessary to selectively "block" certain
// signals when SIGALRM is running. Also, we always restart system
// calls that are interrupted by the signals.
ACE_Sig_Action sa ((ACE_SignalHandler) 0,
this->mask_,
SA_RESTART);
if (this->sig_handler_.register_handler (SIGALRM, this, &sa) == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "register_handler"));
}
// This is the signal handler function for the asynchronous timer
// list. It gets invoked asynchronously when the SIGALRM signal
// occurs.
template <class TQ> int
ACE_Async_Timer_Queue_Adapter<TQ>::handle_signal (int signum,
siginfo_t *,
ucontext_t *)
{
ACE_DEBUG ((LM_DEBUG, "handling signal %S\n", signum));
switch (signum)
{
case SIGALRM:
{
int expired_timers;
// Expire the pending timers.
// @@ We need to figure out how to implement interval timers...
expired_timers = this->timer_queue_.expire ();
if (expired_timers > 0)
ACE_DEBUG ((LM_DEBUG,
"time = %d, timers expired = %d\n",
ACE_OS::time (),
expired_timers));
// Only schedule a new timer if there is one in the list.
// @@ This code should also become smarter to avoid
// unnecessary calls to ualarm().
if (this->timer_queue_.is_empty () == 0)
return this->schedule_ualarm ();
else
return 0;
/* NOTREACHED */
}
default:
ACE_ERROR_RETURN ((LM_ERROR, "unexpected signal %S\n", signum), -1);
/* NOTREACHED */
}
}
template<class TQ>
ACE_Thread_Timer_Queue_Adapter<TQ>::ACE_Thread_Timer_Queue_Adapter (ACE_Thread_Manager *tm)
: ACE_Task_Base (tm),
condition_ (mutex_),
active_ (1), // Assume that we start in active mode.
thr_id_ (ACE_OS::NULL_thread)
{
}
template<class TQ> ACE_SYNCH_MUTEX &
ACE_Thread_Timer_Queue_Adapter<TQ>::mutex (void)
{
return this->mutex_;
}
template<class TQ> long
ACE_Thread_Timer_Queue_Adapter<TQ>::schedule
(ACE_Event_Handler* handler,
const void *act,
const ACE_Time_Value &delay,
const ACE_Time_Value &interval)
{
ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, ace_mon, this->mutex_, -1);
long result = this->timer_queue_.schedule (handler, act, delay, interval);
this->condition_.signal ();
return result;
}
template<class TQ> int
ACE_Thread_Timer_Queue_Adapter<TQ>::cancel (long timer_id,
const void **act)
{
ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, ace_mon, this->mutex_, -1);
int result = this->timer_queue_.cancel (timer_id, act);
condition_.signal ();
return result;
}
template<class TQ> void
ACE_Thread_Timer_Queue_Adapter<TQ>::deactivate (void)
{
ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, this->mutex_);
this->active_ = 0;
this->condition_.signal ();
}
template<class TQ> int
ACE_Thread_Timer_Queue_Adapter<TQ>::svc (void)
{
ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, ace_mon, this->mutex_, -1);
this->thr_id_ = ACE_Thread::self ();
// Thread cancellation point, if ACE supports it.
#if !defined (ACE_LACKS_PTHREAD_CANCEL)
ACE_PTHREAD_CLEANUP_PUSH (&this->condition_.mutex ());
#endif /* ACE_LACKS_PTHREAD_CANCEL */
while (this->active_)
{
// If the queue is empty, sleep until there is a change on it.
if (this->timer_queue_.is_empty ())
this->condition_.wait ();
else
{
// Compute the remaining time, being careful not to sleep
// for "negative" amounts of time.
ACE_Time_Value tv = this->timer_queue_.earliest_time ();
// ACE_DEBUG ((LM_DEBUG, "waiting until %u.%3.3u secs\n",
// tv.sec(), tv.msec()));
this->condition_.wait (&tv);
}
// Expire timers anyway, at worst this is a no-op.
this->timer_queue_.expire ();
}
// Thread cancellation point, if ACE supports it.
#if !defined (ACE_LACKS_PTHREAD_CANCEL)
ACE_PTHREAD_CLEANUP_POP (1);
#endif /* ACE_LACKS_PTHREAD_CANCEL */
ACE_DEBUG ((LM_DEBUG, "terminating dispatching thread\n"));
return 0;
}
#endif /* ACE_TIMER_QUEUE_ADAPTERS_C*/
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