version 1.66, 2004/07/26 23:45:11
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version 1.67, 2004/07/28 16:22:10
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catch(...) | catch(...) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, | Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
"ThreadPool::_loop: Failure getting sleep_sem or deadlock_timer"); |
"ThreadPool::_loop: Failure getting sleep_sem or deadlock_timer."); |
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_graveyard(myself); |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return((PEGASUS_THREAD_RETURN)0); | return((PEGASUS_THREAD_RETURN)0); |
} | } |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, | Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
"ThreadPool::_loop: sleep_sem or deadlock_timer are null."); | "ThreadPool::_loop: sleep_sem or deadlock_timer are null."); |
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_graveyard(myself); |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return((PEGASUS_THREAD_RETURN)0); | return((PEGASUS_THREAD_RETURN)0); |
} | } |
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{ | { |
sleep_sem->wait(); | sleep_sem->wait(); |
} | } |
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catch (WaitInterrupted &e) |
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{ |
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/* From the sem_wait manpage: |
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The sem_trywait() and sem_wait() functions may fail if: |
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EINTR A signal interrupted this function. |
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*/ |
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PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"Sleep semaphore wait failed. Doing a continue"); |
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continue; |
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} |
catch(IPCException& ) | catch(IPCException& ) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, | Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
"ThreadPool::_loop: failure on sleep_sem->wait()."); | "ThreadPool::_loop: failure on sleep_sem->wait()."); |
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_graveyard(myself); |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return((PEGASUS_THREAD_RETURN)0); | return((PEGASUS_THREAD_RETURN)0); |
} | } |
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// when we awaken we reside on the running queue, not the pool queue | // when we awaken we reside on the running queue, not the pool queue |
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/* Hence no need to move the thread to the _dead queue, as the _running |
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* queue is only dused by kill_dead_threads which makes sure that the |
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* the threads are cleaned up (unlocking any locked lists in the TSD, etc) |
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* before killing it. |
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*/ |
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PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *_work)(void *) = 0; | PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *_work)(void *) = 0; |
void *parm = 0; | void *parm = 0; |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, | Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
"ThreadPool::_loop: Failure accessing work func, work parm, or blocking sem."); | "ThreadPool::_loop: Failure accessing work func, work parm, or blocking sem."); |
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/* |
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* We cannot move ourselves to the dead queue b/c the TSD might be still |
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* locked and _graveyard is not equipped to de-lock (dereference_tsd) the TSD. |
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* Only the kill_dead_threads has enough logic to handle such situations. |
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_graveyard( myself); |
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*/ |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return((PEGASUS_THREAD_RETURN)0); | return((PEGASUS_THREAD_RETURN)0); |
} | } |
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if(_work == | if(_work == |
(PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) &_undertaker) | (PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) &_undertaker) |
{ | { |
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/* |
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* The undertaker is set by ThreadPool::kill_dead_threads which awakens this thread, |
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* joins it and then removes it from the queue. Hence no reason to go to the |
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_graveyard( myself); |
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*/ |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
_work(parm); | _work(parm); |
} | } |
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{ | { |
try | try |
{ | { |
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PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, |
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"Worker started"); |
_work(parm); | _work(parm); |
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PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, |
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"Worker finished"); |
} | } |
catch(Exception & e) | catch(Exception & e) |
{ | { |
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// manipulate the threads on the ThreadPool queues, they should never | // manipulate the threads on the ThreadPool queues, they should never |
// be allowed to run at the same time. | // be allowed to run at the same time. |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::kill_dead_threads"); |
// << Thu Oct 23 14:41:02 2003 mdd >> | // << Thu Oct 23 14:41:02 2003 mdd >> |
// not true, the queues are thread safe. they are syncrhonized. | // not true, the queues are thread safe. they are syncrhonized. |
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struct timeval now; | struct timeval now; |
gettimeofday(&now, NULL); | gettimeofday(&now, NULL); |
Uint32 bodies = 0; | Uint32 bodies = 0; |
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AtomicInt needed(0); |
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// first go thread the dead q and clean it up as much as possible | // first go thread the dead q and clean it up as much as possible |
try | try |
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} | } |
catch(...) | catch(...) |
{ | { |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "Exception when deleting dead"); |
} | } |
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if (_dying.value()) | if (_dying.value()) |
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DQueue<Thread> *q = 0; | DQueue<Thread> *q = 0; |
int i = 0; | int i = 0; |
AtomicInt needed(0); |
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Thread *th = 0; | Thread *th = 0; |
internal_dq idq; | internal_dq idq; |
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} | } |
} | } |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
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"We need %u new threads", needed.value()); |
while (needed.value() > 0) { | while (needed.value() > 0) { |
_link_pool(_init_thread()); | _link_pool(_init_thread()); |
needed--; | needed--; |
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catch (...) | catch (...) |
{ | { |
} | } |
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PEG_METHOD_EXIT(); |
return 0; | return 0; |
} | } |
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PEGASUS_THREAD_RETURN ThreadPool::_undertaker( void *parm ) | PEGASUS_THREAD_RETURN ThreadPool::_undertaker( void *parm ) |
{ | { |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_undertaker"); |
exit_thread((PEGASUS_THREAD_RETURN)1); | exit_thread((PEGASUS_THREAD_RETURN)1); |
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PEG_METHOD_EXIT(); |
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return (PEGASUS_THREAD_RETURN)1; |
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} |
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PEGASUS_THREAD_RETURN ThreadPool::_graveyard(Thread *t) |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_graveyard"); |
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ThreadPool *pool = (ThreadPool *)t->get_parm(); |
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if(pool == 0 ) { |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
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"Could not obtain the pool information from the Thread.", t); |
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return (PEGASUS_THREAD_RETURN)1; |
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} |
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if (pool->_pool.exists(t)) |
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{ |
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if (pool->_pool.remove( (void *) t) != 0) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Moving thread %p", t); |
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/* We are moving the thread to the _running queue b/c |
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_only_ kill_dead_threads has enough logic to take care |
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of cleaning up the threads.*/ |
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pool->_running.insert_first( t ); |
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} |
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else |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Could not move Thread %p from _pool to _runing queue.", t); |
return (PEGASUS_THREAD_RETURN)1; | return (PEGASUS_THREAD_RETURN)1; |
} | } |
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} |
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else if (pool->_running.exists(t)) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread %p is on _running queue. Letting kill_dead_threads take care of the problem.", t); |
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return (PEGASUS_THREAD_RETURN)1; |
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} |
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if (!pool->_dead.exists(t)) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
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"Thread is not on any queue! Moving it to the running queue."); |
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pool->_running.insert_first( t ); |
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} |
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PEG_METHOD_EXIT(); |
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return (PEGASUS_THREAD_RETURN)0; |
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} |
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void ThreadPool::_sleep_sem_del(void *p) | void ThreadPool::_sleep_sem_del(void *p) |
{ | { |
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Thread *ThreadPool::_init_thread(void) throw(IPCException) | Thread *ThreadPool::_init_thread(void) throw(IPCException) |
{ | { |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_init_thread"); |
Thread *th = (Thread *) new Thread(_loop, this, false); | Thread *th = (Thread *) new Thread(_loop, this, false); |
// allocate a sleep semaphore and pass it in the thread context | // allocate a sleep semaphore and pass it in the thread context |
// initial count is zero, loop function will sleep until | // initial count is zero, loop function will sleep until |
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} | } |
_current_threads++; | _current_threads++; |
pegasus_yield(); | pegasus_yield(); |
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PEG_METHOD_EXIT(); |
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return th; | return th; |
} | } |