version 1.29, 2002/09/20 02:06:18
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version 1.41, 2003/08/04 20:18:51
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} | } |
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Boolean Thread::_signals_blocked = false; | Boolean Thread::_signals_blocked = false; |
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// l10n |
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PEGASUS_THREAD_KEY_TYPE Thread::_platform_thread_key; |
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Boolean Thread::_key_initialized = false; |
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Boolean Thread::_key_error = false; |
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// for non-native implementations | // for non-native implementations |
#ifndef PEGASUS_THREAD_CLEANUP_NATIVE | #ifndef PEGASUS_THREAD_CLEANUP_NATIVE |
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#endif | #endif |
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// l10n start |
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Sint8 Thread::initializeKey() |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey"); |
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if (!Thread::_key_initialized) |
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{ |
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if (Thread::_key_error) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: ERROR - thread key error"); |
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return -1; |
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} |
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if (pegasus_key_create(&Thread::_platform_thread_key) == 0) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: able to create a thread key"); |
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Thread::_key_initialized = true; |
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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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"Thread: ERROR - unable to create a thread key"); |
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Thread::_key_error = true; |
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return -1; |
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} |
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} |
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PEG_METHOD_EXIT(); |
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return 0; |
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} |
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Thread * Thread::getCurrent() |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
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if (Thread::initializeKey() != 0) |
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{ |
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return NULL; |
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} |
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PEG_METHOD_EXIT(); |
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return (Thread *)pegasus_get_thread_specific(_platform_thread_key); |
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} |
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void Thread::setCurrent(Thread * thrd) |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
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if (Thread::initializeKey() == 0) |
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{ |
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if (pegasus_set_thread_specific(Thread::_platform_thread_key, |
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(void *) thrd) == 0) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Successful set Thread * into thread specific storage"); |
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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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"ERROR: got error setting Thread * into thread specific storage"); |
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} |
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} |
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PEG_METHOD_EXIT(); |
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} |
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AcceptLanguages * Thread::getLanguages() |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
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Thread * curThrd = Thread::getCurrent(); |
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if (curThrd == NULL) |
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return NULL; |
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AcceptLanguages * acceptLangs = |
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(AcceptLanguages *)curThrd->reference_tsd("acceptLanguages"); |
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curThrd->dereference_tsd(); |
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PEG_METHOD_EXIT(); |
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return acceptLangs; |
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} |
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void Thread::setLanguages(AcceptLanguages *langs) //l10n |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
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Thread * currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ |
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// deletes the old tsd and creates a new one |
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currentThrd->put_tsd("acceptLanguages", |
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thread_data::default_delete, |
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sizeof(AcceptLanguages *), |
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langs); |
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} |
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PEG_METHOD_EXIT(); |
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} |
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void Thread::clearLanguages() //l10n |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
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Thread * currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ |
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// deletes the old tsd |
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currentThrd->delete_tsd("acceptLanguages"); |
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} |
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PEG_METHOD_EXIT(); |
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} |
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// l10n end |
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DQueue<ThreadPool> ThreadPool::_pools(true); | DQueue<ThreadPool> ThreadPool::_pools(true); |
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_link_pool(_init_thread()); | _link_pool(_init_thread()); |
} | } |
_pools.insert_last(this); | _pools.insert_last(this); |
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} | } |
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ThreadPool::~ThreadPool(void) | ThreadPool::~ThreadPool(void) |
{ | { |
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try |
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{ |
_pools.remove(this); | _pools.remove(this); |
_dying++; | _dying++; |
Thread *th = 0; | Thread *th = 0; |
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delete th; | delete th; |
th = _dead.remove_first(); | th = _dead.remove_first(); |
} | } |
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} |
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catch(...) |
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{ |
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} |
} | } |
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// make this static to the class | // make this static to the class |
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PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
throw NullPointer(); | throw NullPointer(); |
} | } |
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// l10n |
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// Set myself into thread specific storage |
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// This will allow code to get its own Thread |
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Thread::setCurrent(myself); |
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ThreadPool *pool = (ThreadPool *)myself->get_parm(); | ThreadPool *pool = (ThreadPool *)myself->get_parm(); |
if(pool == 0 ) | if(pool == 0 ) |
{ | { |
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PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
myself->exit_self(0); | myself->exit_self(0); |
} | } |
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catch(...) |
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{ |
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PEG_METHOD_EXIT(); |
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myself->exit_self(0); |
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} |
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if(sleep_sem == 0 || deadlock_timer == 0) | if(sleep_sem == 0 || deadlock_timer == 0) |
{ | { |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
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{ | { |
gettimeofday(deadlock_timer, NULL); | gettimeofday(deadlock_timer, NULL); |
} | } |
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gettimeofday(deadlock_timer, NULL); | gettimeofday(deadlock_timer, NULL); |
if( blocking_sem != 0 ) | if( blocking_sem != 0 ) |
blocking_sem->signal(); | blocking_sem->signal(); |
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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 |
while(_dead.count() > 0) | while(_dead.count() > 0) |
{ | { |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "ThreadPool:: removing and joining dead thread"); |
Thread *dead = _dead.remove_first(); | Thread *dead = _dead.remove_first(); |
if(dead == 0) | if(dead == 0) |
throw NullPointer(); | throw NullPointer(); |
if(dead->_handle.thid != 0) |
dead->join(); |
{ |
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dead->detach(); |
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destroy_thread(dead->_handle.thid, 0); |
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dead->_handle.thid = 0; |
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while(dead->_cleanup.count() ) |
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{ |
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// this may throw a permission exception, |
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// which I will remove from the code prior to stabilizing |
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dead->cleanup_pop(true); |
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} |
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} |
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delete dead; | delete dead; |
pegasus_sleep(1); |
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} | } |
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DQueue<Thread> * map[2] = | DQueue<Thread> * map[2] = |
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int i = 0; | int i = 0; |
AtomicInt needed(0); | AtomicInt needed(0); |
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// for( ; i < 2; i++) << Fri Sep 13 12:49:46 2002 mdd >> |
#ifdef PEGASUS_DISABLE_KILLING_HUNG_THREADS |
// This change prevents the thread pool from killing hung threads. |
// This change prevents the thread pool from killing "hung" threads. |
// The definition of a hung thread is one that has been on the run queue for too long. |
// The definition of a "hung" thread is one that has been on the run queue |
// "too long" is defined as a time interval that is set when the thread pool is created. |
// for longer than the time interval set when the thread pool was created. |
// Cancelling "hung" threads has proved to be problematic. |
// Cancelling "hung" threads has proven to be problematic. |
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// With this change the thread pool will not cancel hung threads. This may prevent a |
// With this change the thread pool will not cancel "hung" threads. This |
// crash depending upon the state of the hung thread. It will cause the thread to hang |
// may prevent a crash depending upon the state of the "hung" thread. In |
// around and not do anything besides waste space. |
// the case that the thread is actually hung, this change causes the |
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// thread resources not to be reclaimed. |
// Idle threads, those that have not executed a routine for a time interval, continue to be |
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// destroyed. This is normal and should not cause any problems. |
// Idle threads, those that have not executed a routine for a time |
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// interval, continue to be destroyed. This is normal and should not |
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// cause any problems. |
for( ; i < 1; i++) | for( ; i < 1; i++) |
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#else |
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for( ; i < 2; i++) |
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#endif |
{ | { |
q = map[i]; | q = map[i]; |
if(q->count() > 0 ) | if(q->count() > 0 ) |
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th = q->remove_no_lock((void *)th); | th = q->remove_no_lock((void *)th); |
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// ATTN-DME-P3-20020919 This code assumes that the thread being |
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// killed is 'alive' and available to respond to a terminate |
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// request quickly. Since this code is only processing threads |
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// on the _pool (i.e., idle) queue this assumption is currently |
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// valid. However, this code should not be called if the |
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// thread is truly 'hung' or executing a long running request |
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// because it will cause this thread to wait. |
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if(th != 0) | if(th != 0) |
{ | { |
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if( i == 0 ) |
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{ |
th->delete_tsd("work func"); | th->delete_tsd("work func"); |
th->put_tsd("work func", NULL, | th->put_tsd("work func", NULL, |
sizeof( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)), | sizeof( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)), |
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throw NullPointer(); | throw NullPointer(); |
} | } |
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#ifdef DO_NOT_IMPLEMENT_THREAD_POOL_FIX |
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// The above code activates an idle thread to run the |
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// _undertaker method. This will cause the thread to |
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// terminate. The issue with placing this |
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// thread on the _dead queue is that it creates a timing |
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// problem. If the kill_dead_threads procedure is called |
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// before this thread has a chance to execute, or while |
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// this thread is executing, the thread object may be |
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// deleted prematurely. This can cause the CIM Server |
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// or the ThreadPool test to core dump or hang. |
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// |
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// put the thread on the dead list |
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_dead.insert_first(th); |
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bodies++; | bodies++; |
sleep_sem->signal(); |
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th->dereference_tsd(); | th->dereference_tsd(); |
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_dead.insert_first(th); |
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sleep_sem->signal(); |
th = 0; | th = 0; |
#else |
} |
// Wait until the thread exits before deleting the |
else |
// thread object and related data structures. |
{ |
// |
// deadlocked threads |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "Killing a deadlocked thread"); |
th->cancel(); | th->cancel(); |
th->dereference_tsd(); |
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sleep_sem->signal(); |
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th->join(); |
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th->empty_tsd(); |
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delete th; | delete th; |
th=0; |
} |
bodies++; |
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#endif |
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} | } |
} | } |
th = q->next(th); | th = q->next(th); |
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struct timeval now, finish, remaining; | struct timeval now, finish, remaining; |
Uint32 usec; | Uint32 usec; |
gettimeofday(&now, NULL); |
pegasus_gettimeofday(&now); |
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/* remove valgrind error */ |
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pegasus_gettimeofday(&remaining); |
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finish.tv_sec = start->tv_sec + interval->tv_sec; | finish.tv_sec = start->tv_sec + interval->tv_sec; |
usec = start->tv_usec + interval->tv_usec; | usec = start->tv_usec + interval->tv_usec; |
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return false; | return false; |
} | } |
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PEGASUS_THREAD_RETURN ThreadPool::_undertaker( void *parm ) | PEGASUS_THREAD_RETURN ThreadPool::_undertaker( void *parm ) |
{ | { |
Thread *myself = reinterpret_cast<Thread *>(parm); |
exit_thread((PEGASUS_THREAD_RETURN)1); |
if(myself != 0) |
return (PEGASUS_THREAD_RETURN)1; |
{ |
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myself->detach(); |
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#ifdef DO_NOT_IMPLEMENT_THREAD_POOL_FIX |
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// Implementations of the join operation rely on the |
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// value of the handle.thid to implement the join operation. |
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// Setting this value to 0 can cause the thread |
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// issuing the join call to hang. |
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myself->_handle.thid = 0; |
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#endif |
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myself->cancel(); |
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myself->test_cancel(); |
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myself->exit_self(0); |
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} |
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return((PEGASUS_THREAD_RETURN)0); |
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} | } |
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th->put_tsd("sleep sem", &_sleep_sem_del, sizeof(Semaphore), (void *)sleep_sem); | th->put_tsd("sleep sem", &_sleep_sem_del, sizeof(Semaphore), (void *)sleep_sem); |
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struct timeval *dldt = (struct timeval *) ::operator new(sizeof(struct timeval)); | struct timeval *dldt = (struct timeval *) ::operator new(sizeof(struct timeval)); |
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pegasus_gettimeofday(dldt); |
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th->put_tsd("deadlock timer", thread_data::default_delete, sizeof(struct timeval), (void *)dldt); | th->put_tsd("deadlock timer", thread_data::default_delete, sizeof(struct timeval), (void *)dldt); |
// thread will enter _loop(void *) and sleep on sleep_sem until we signal it | // thread will enter _loop(void *) and sleep on sleep_sem until we signal it |
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th->run(); | th->run(); |
_current_threads++; | _current_threads++; |
pegasus_yield(); | pegasus_yield(); |
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} | } |
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PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |
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