int ThreadPoolRemove(ThreadPool *tp, int jobId, ThreadPoolJob *out)
{
int ret = INVALID_JOB_ID;
ThreadPoolJob *temp = NULL;
ListNode *tempNode = NULL;
ThreadPoolJob dummy;
if (!tp)
return EINVAL;
if (!out)
out = &dummy;
dummy.jobId = jobId;
ithread_mutex_lock(&tp->mutex);
tempNode = ListFind(&tp->highJobQ, NULL, &dummy);
if (tempNode) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode(&tp->highJobQ, tempNode, 0);
FreeThreadPoolJob(tp, temp);
ret = 0;
goto exit_function;
}
tempNode = ListFind(&tp->medJobQ, NULL, &dummy);
if (tempNode) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode(&tp->medJobQ, tempNode, 0);
FreeThreadPoolJob(tp, temp);
ret = 0;
goto exit_function;
}
tempNode = ListFind(&tp->lowJobQ, NULL, &dummy);
if (tempNode) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode(&tp->lowJobQ, tempNode, 0);
FreeThreadPoolJob(tp, temp);
ret = 0;
goto exit_function;
}
if (tp->persistentJob && tp->persistentJob->jobId == jobId) {
*out = *tp->persistentJob;
FreeThreadPoolJob(tp, tp->persistentJob);
tp->persistentJob = NULL;
ret = 0;
goto exit_function;
}
exit_function:
ithread_mutex_unlock(&tp->mutex);
return ret;
}
/*
* This gets called before queuing a new event.
* - The list size can never go over MAX_SUBSCRIPTION_QUEUED_EVENTS so we
* discard the oldest non-active event if it is already at the max
* - We also discard any non-active event older than MAX_SUBSCRIPTION_EVENT_AGE.
* non-active: any but the head of queue, which is already copied to
* the thread pool
*/
static void maybeDiscardEvents(LinkedList *listp)
{
time_t now = time(0L);
while (ListSize(listp) > 1) {
ListNode *node = ListHead(listp);
/* The first candidate is the second event: first non-active */
if (node == 0 || (node = node->next) == 0) {
/* Major inconsistency, really, should abort here. */
fprintf(stderr, "gena_device: maybeDiscardEvents: "
"list is inconsistent\n");
break;
}
notify_thread_struct *ntsp =
(notify_thread_struct *)(((ThreadPoolJob *)node->item)->arg);
if (ListSize(listp) > g_UpnpSdkEQMaxLen ||
now - ntsp->ctime > g_UpnpSdkEQMaxAge) {
free_notify_struct(ntsp);
free(node->item);
ListDelNode(listp, node, 0);
} else {
/* If the list is smaller than the max and the oldest
* task is young enough, stop pruning */
break;
}
}
}
/************************************************************************
* Function: TimerThreadShutdown
*
* Description:
* Shutdown the timer thread
* Events scheduled in the future will NOT be run.
* Timer thread should be shutdown BEFORE it's associated
* thread pool.
* Returns:
* returns 0 if succesfull,
* nonzero otherwise.
* Always returns 0.
***********************************************************************/
int
TimerThreadShutdown( TimerThread * timer )
{
ListNode *tempNode2 = NULL;
ListNode *tempNode = NULL;
assert( timer != NULL );
if( timer == NULL ) {
return EINVAL;
}
ithread_mutex_lock( &timer->mutex );
timer->shutdown = 1;
tempNode = ListHead( &timer->eventQ );
//Delete nodes in Q
//call registered free function
//on argument
while( tempNode != NULL ) {
TimerEvent *temp = ( TimerEvent * ) tempNode->item;
tempNode2 = ListNext( &timer->eventQ, tempNode );
ListDelNode( &timer->eventQ, tempNode, 0 );
if( temp->job.free_func ) {
temp->job.free_func( temp->job.arg );
}
FreeTimerEvent( timer, temp );
tempNode = tempNode2;
}
ListDestroy( &timer->eventQ, 0 );
FreeListDestroy( &timer->freeEvents );
ithread_cond_broadcast( &timer->condition );
while( timer->shutdown ) //wait for timer thread to shutdown
{
ithread_cond_wait( &timer->condition, &timer->mutex );
}
ithread_mutex_unlock( &timer->mutex );
//destroy condition
while( ithread_cond_destroy( &timer->condition ) != 0 ) {
}
//destroy mutex
while( ithread_mutex_destroy( &timer->mutex ) != 0 ) {
}
return 0;
}
/****************************************************************************
* Function: BumpPriority
*
* Description:
* Determines whether any jobs
* need to be bumped to a higher priority Q and bumps them.
*
* tp->mutex must be locked.
* Internal Only.
* Parameters:
* ThreadPool *tp
*****************************************************************************/
static void BumpPriority( ThreadPool *tp )
{
int done = 0;
struct timeval now;
unsigned long diffTime = 0;
ThreadPoolJob *tempJob = NULL;
assert( tp != NULL );
gettimeofday(&now, NULL);
while( !done ) {
if( tp->medJobQ.size ) {
tempJob = ( ThreadPoolJob *) tp->medJobQ.head.next->item;
diffTime = DiffMillis( &now, &tempJob->requestTime );
if( diffTime >= ( tp->attr.starvationTime ) ) {
// If job has waited longer than the starvation time
// bump priority (add to higher priority Q)
StatsAccountMQ( tp, diffTime );
ListDelNode( &tp->medJobQ, tp->medJobQ.head.next, 0 );
ListAddTail( &tp->highJobQ, tempJob );
continue;
}
}
if( tp->lowJobQ.size ) {
tempJob = ( ThreadPoolJob *) tp->lowJobQ.head.next->item;
diffTime = DiffMillis( &now, &tempJob->requestTime );
if( diffTime >= ( tp->attr.maxIdleTime ) ) {
// If job has waited longer than the starvation time
// bump priority (add to higher priority Q)
StatsAccountLQ( tp, diffTime );
ListDelNode( &tp->lowJobQ, tp->lowJobQ.head.next, 0 );
ListAddTail( &tp->medJobQ, tempJob );
continue;
}
}
done = 1;
}
}
/************************************************************************
* Function : searchExpired
*
* Parameters:
* IN void * arg:
*
* Description:
* This function
*
* Returns: void
*
***************************************************************************/
void
searchExpired( void *arg )
{
int *id = ( int * )arg;
int handle = -1;
struct Handle_Info *ctrlpt_info = NULL;
//remove search Target from list and call client back
ListNode *node = NULL;
SsdpSearchArg *item;
Upnp_FunPtr ctrlpt_callback;
void *cookie = NULL;
int found = 0;
HandleLock( );
//remove search target from search list
if( GetClientHandleInfo( &handle, &ctrlpt_info ) != HND_CLIENT ) {
free( id );
HandleUnlock( );
return;
}
ctrlpt_callback = ctrlpt_info->Callback;
node = ListHead( &ctrlpt_info->SsdpSearchList );
while( node != NULL ) {
item = ( SsdpSearchArg * ) node->item;
if( item->timeoutEventId == ( *id ) ) {
free( item->searchTarget );
cookie = item->cookie;
found = 1;
item->searchTarget = NULL;
free( item );
ListDelNode( &ctrlpt_info->SsdpSearchList, node, 0 );
break;
}
node = ListNext( &ctrlpt_info->SsdpSearchList, node );
}
HandleUnlock( );
if( found ) {
ctrlpt_callback( UPNP_DISCOVERY_SEARCH_TIMEOUT, NULL, cookie );
}
free( id );
}
static void s_Delete_Object(t_FAKE_OBJ *fake_hnd)
{
ListNode *node = ListHead(&s_object_list);
while( node )
{
if( node->item == (void*)fake_hnd )
{
free(fake_hnd);
ListDelNode(&s_object_list, node, 0);
break;
}
node = ListNext(&s_object_list, node);
}
}
/****************************************************************************
* Function: ListDestroy
*
* Description:
* Removes all memory associated with list nodes.
* Does not free LinkedList *list.
* Items stored in the list are not freed, only nodes are.
* Parameters:
* LinkedList *list - must be valid, non null, pointer to a linked list.
* Returns:
* 0 on success. Nonzero on failure.
* Always returns 0.
* Precondition:
* The list has been initialized.
*****************************************************************************/
int
ListDestroy( LinkedList * list,
int freeItem )
{
ListNode *dnode = NULL;
ListNode *temp = NULL;
if( list == NULL )
return EINVAL;
for( dnode = list->head.next; dnode != &list->tail; ) {
temp = dnode->next;
ListDelNode( list, dnode, freeItem );
dnode = temp;
}
list->size = 0;
FreeListDestroy( &list->freeNodeList );
return 0;
}
void freeSubscriptionQueuedEvents(subscription *sub)
{
if (ListSize(&sub->outgoing) > 0) {
/* The first event is discarded without dealing
notify_thread_struct: there is a mirror ThreadPool entry for
this one, and it will take care of the refcount etc. Other
entries must be fully cleaned-up here */
int first = 1;
ListNode *node = ListHead(&sub->outgoing);
while (node) {
ThreadPoolJob *job = (ThreadPoolJob *)node->item;
if (first) {
first = 0;
} else {
free_notify_struct((notify_thread_struct *)job->arg);
}
free(node->item);
ListDelNode(&sub->outgoing, node, 0);
node = ListHead(&sub->outgoing);
}
}
}
/************************************************************************
* Function: TimerThreadRemove
*
* Description:
* Removes an event from the timer Q.
* Events can only be removed
* before they have been placed in the
* thread pool.
*
* Parameters:
* timer - valid timer thread pointer.
* id - id of event to remove.
* out - space for returned job (Can be NULL)
* Return:
* 0 on success.
* INVALID_EVENT_ID on error.
*
************************************************************************/
int
TimerThreadRemove( TimerThread * timer,
int id,
ThreadPoolJob * out )
{
int rc = INVALID_EVENT_ID;
ListNode *tempNode = NULL;
TimerEvent *temp = NULL;
assert( timer != NULL );
if( timer == NULL ) {
return EINVAL;
}
ithread_mutex_lock( &timer->mutex );
tempNode = ListHead( &timer->eventQ );
while( tempNode != NULL ) {
temp = ( TimerEvent * ) tempNode->item;
if( temp->id == id )
{
ListDelNode( &timer->eventQ, tempNode, 0 );
if( out != NULL )
( *out ) = temp->job;
FreeTimerEvent( timer, temp );
rc = 0;
break;
}
tempNode = ListNext( &timer->eventQ, tempNode );
}
ithread_mutex_unlock( &timer->mutex );
return rc;
}
static void s_Dmscp_UnRegister_ServiceCalback(int hnd)
{
int *p;
ListNode *node;
HT_DBG_FUNC_START(HT_MOD_DMC, HT_BIT_MANY,(int)hnd, NULL);
sem_wait(&(s_dmscp_service_updated_lock));
node = ListHead(&s_dmscp_service_updated_list);
while( node )
{
p = (int *)(node->item);
if( p[1] == hnd )
{
ListDelNode(&s_dmscp_service_updated_list, node, 0);
free(p);
break;
}
node = ListNext(&s_dmscp_service_updated_list, node);
}
sem_post(&(s_dmscp_service_updated_lock));
HT_DBG_FUNC_END(hnd, NULL);
}
/*!
* \brief Thread job to Notify a control point.
*
* It validates the subscription and copies the subscription. Also make sure
* that events are sent in order.
*
* \note calls the genaNotify to do the actual work.
*/
static void genaNotifyThread(
/*! [in] notify thread structure containing all the headers and property set info. */
void *input)
{
subscription *sub;
service_info *service;
subscription sub_copy;
notify_thread_struct *in = (notify_thread_struct *) input;
int return_code;
struct Handle_Info *handle_info;
/* This should be a HandleLock and not a HandleReadLock otherwise if there
* is a lot of notifications, then multiple threads will acquire a read
* lock and the thread which sends the notification will be blocked forever
* on the HandleLock at the end of this function. */
/*HandleReadLock(); */
HandleLock();
/* validate context */
if (GetHandleInfo(in->device_handle, &handle_info) != HND_DEVICE) {
free_notify_struct(in);
HandleUnlock();
return;
}
if (!(service = FindServiceId(&handle_info->ServiceTable, in->servId, in->UDN)) ||
!service->active ||
!(sub = GetSubscriptionSID(in->sid, service)) ||
copy_subscription(sub, &sub_copy) != HTTP_SUCCESS) {
free_notify_struct(in);
HandleUnlock();
return;
}
HandleUnlock();
/* send the notify */
return_code = genaNotify(in->headers, in->propertySet, &sub_copy);
freeSubscription(&sub_copy);
HandleLock();
if (GetHandleInfo(in->device_handle, &handle_info) != HND_DEVICE) {
free_notify_struct(in);
HandleUnlock();
return;
}
/* validate context */
if (!(service = FindServiceId(&handle_info->ServiceTable, in->servId, in->UDN)) ||
!service->active ||
!(sub = GetSubscriptionSID(in->sid, service))) {
free_notify_struct(in);
HandleUnlock();
return;
}
sub->ToSendEventKey++;
if (sub->ToSendEventKey < 0)
/* wrap to 1 for overflow */
sub->ToSendEventKey = 1;
/* Remove head of event queue. Possibly activate next */
{
ListNode *node = ListHead(&sub->outgoing);
if (node)
ListDelNode(&sub->outgoing, node, 1);
if (ListSize(&sub->outgoing) > 0) {
ThreadPoolJob *job;
ListNode *node = ListHead(&sub->outgoing);
job = (ThreadPoolJob*)node->item;
/* The new head of queue should not have already been
added to the pool, else something is very wrong */
assert(job->jobId != STALE_JOBID);
ThreadPoolAdd(&gSendThreadPool, job, NULL);
job->jobId = STALE_JOBID;
}
}
if (return_code == GENA_E_NOTIFY_UNACCEPTED_REMOVE_SUB)
RemoveSubscriptionSID(in->sid, service);
free_notify_struct(in);
HandleUnlock();
}
/****************************************************************************
* Function: TimerThreadWorker
*
* Description:
* Implements timer thread.
* Waits for next event to occur and schedules
* associated job into threadpool.
* Internal Only.
* Parameters:
* void * arg -> is cast to TimerThread *
*****************************************************************************/
static void *
TimerThreadWorker( void *arg )
{
TimerThread *timer = ( TimerThread * ) arg;
ListNode *head = NULL;
TimerEvent *nextEvent = NULL;
time_t currentTime = 0;
time_t nextEventTime = 0;
struct timespec timeToWait;
int tempId;
assert( timer != NULL );
ithread_mutex_lock( &timer->mutex );
while( 1 )
{
//mutex should always be locked at top of loop
//Check for shutdown
if( timer->shutdown )
{
timer->shutdown = 0;
ithread_cond_signal( &timer->condition );
ithread_mutex_unlock( &timer->mutex );
return NULL;
}
nextEvent = NULL;
//Get the next event if possible
if( timer->eventQ.size > 0 )
{
head = ListHead( &timer->eventQ );
nextEvent = ( TimerEvent * ) head->item;
nextEventTime = nextEvent->eventTime;
}
currentTime = time( NULL );
//If time has elapsed, schedule job
if( ( nextEvent != NULL ) && ( currentTime >= nextEventTime ) )
{
if( nextEvent->persistent ) {
ThreadPoolAddPersistent( timer->tp, &nextEvent->job,
&tempId );
} else {
ThreadPoolAdd( timer->tp, &nextEvent->job, &tempId );
}
ListDelNode( &timer->eventQ, head, 0 );
FreeTimerEvent( timer, nextEvent );
continue;
}
if( nextEvent != NULL ) {
timeToWait.tv_nsec = 0;
timeToWait.tv_sec = nextEvent->eventTime;
ithread_cond_timedwait( &timer->condition, &timer->mutex,
&timeToWait );
} else {
ithread_cond_wait( &timer->condition, &timer->mutex );
}
}
}
int ThreadPoolShutdown(ThreadPool *tp)
{
ListNode *head = NULL;
ThreadPoolJob *temp = NULL;
if (!tp)
return EINVAL;
ithread_mutex_lock(&tp->mutex);
/* clean up high priority jobs */
while (tp->highJobQ.size) {
head = ListHead(&tp->highJobQ);
if (head == NULL) {
ithread_mutex_unlock(&tp->mutex);
return EINVAL;
}
temp = (ThreadPoolJob *)head->item;
if (temp->free_func)
temp->free_func(temp->arg);
FreeThreadPoolJob(tp, temp);
ListDelNode(&tp->highJobQ, head, 0);
}
ListDestroy(&tp->highJobQ, 0);
/* clean up med priority jobs */
while (tp->medJobQ.size) {
head = ListHead(&tp->medJobQ);
if (head == NULL) {
ithread_mutex_unlock(&tp->mutex);
return EINVAL;
}
temp = (ThreadPoolJob *)head->item;
if (temp->free_func)
temp->free_func(temp->arg);
FreeThreadPoolJob(tp, temp);
ListDelNode(&tp->medJobQ, head, 0);
}
ListDestroy(&tp->medJobQ, 0);
/* clean up low priority jobs */
while (tp->lowJobQ.size) {
head = ListHead(&tp->lowJobQ);
if (head == NULL) {
ithread_mutex_unlock(&tp->mutex);
return EINVAL;
}
temp = (ThreadPoolJob *)head->item;
if (temp->free_func)
temp->free_func(temp->arg);
FreeThreadPoolJob(tp, temp);
ListDelNode(&tp->lowJobQ, head, 0);
}
ListDestroy(&tp->lowJobQ, 0);
/* clean up long term job */
if (tp->persistentJob) {
temp = tp->persistentJob;
if (temp->free_func)
temp->free_func(temp->arg);
FreeThreadPoolJob(tp, temp);
tp->persistentJob = NULL;
}
/* signal shutdown */
tp->shutdown = 1;
ithread_cond_broadcast(&tp->condition);
/* wait for all threads to finish */
while (tp->totalThreads > 0)
ithread_cond_wait(&tp->start_and_shutdown, &tp->mutex);
/* destroy condition */
while (ithread_cond_destroy(&tp->condition) != 0) {}
while (ithread_cond_destroy(&tp->start_and_shutdown) != 0) {}
FreeListDestroy(&tp->jobFreeList);
ithread_mutex_unlock(&tp->mutex);
/* destroy mutex */
while (ithread_mutex_destroy(&tp->mutex) != 0) {}
return 0;
}
/*!
* \brief Implements a thread pool worker. Worker waits for a job to become
* available. Worker picks up persistent jobs first, high priority,
* med priority, then low priority.
*
* If worker remains idle for more than specified max, the worker is released.
*
* \internal
*/
static void *WorkerThread(
/*! arg -> is cast to (ThreadPool *). */
void *arg)
{
time_t start = 0;
ThreadPoolJob *job = NULL;
ListNode *head = NULL;
struct timespec timeout;
int retCode = 0;
int persistent = -1;
ThreadPool *tp = (ThreadPool *) arg;
ithread_initialize_thread();
/* Increment total thread count */
ithread_mutex_lock(&tp->mutex);
tp->totalThreads++;
tp->pendingWorkerThreadStart = 0;
ithread_cond_broadcast(&tp->start_and_shutdown);
ithread_mutex_unlock(&tp->mutex);
SetSeed();
StatsTime(&start);
while (1) {
ithread_mutex_lock(&tp->mutex);
if (job) {
tp->busyThreads--;
FreeThreadPoolJob(tp, job);
job = NULL;
}
retCode = 0;
tp->stats.idleThreads++;
tp->stats.totalWorkTime += (double)StatsTime(NULL) - (double)start;
StatsTime(&start);
if (persistent == 0) {
tp->stats.workerThreads--;
} else if (persistent == 1) {
/* Persistent thread becomes a regular thread */
tp->persistentThreads--;
}
/* Check for a job or shutdown */
while (tp->lowJobQ.size == 0 &&
tp->medJobQ.size == 0 &&
tp->highJobQ.size == 0 &&
!tp->persistentJob && !tp->shutdown) {
/* If wait timed out and we currently have more than the
* min threads, or if we have more than the max threads
* (only possible if the attributes have been reset)
* let this thread die. */
if ((retCode == ETIMEDOUT &&
tp->totalThreads > tp->attr.minThreads) ||
(tp->attr.maxThreads != -1 &&
tp->totalThreads > tp->attr.maxThreads)) {
tp->stats.idleThreads--;
goto exit_function;
}
SetRelTimeout(&timeout, tp->attr.maxIdleTime);
/* wait for a job up to the specified max time */
retCode = ithread_cond_timedwait(
&tp->condition, &tp->mutex, &timeout);
}
tp->stats.idleThreads--;
/* idle time */
tp->stats.totalIdleTime += (double)StatsTime(NULL) - (double)start;
/* work time */
StatsTime(&start);
/* bump priority of starved jobs */
BumpPriority(tp);
/* if shutdown then stop */
if (tp->shutdown) {
goto exit_function;
} else {
/* Pick up persistent job if available */
if (tp->persistentJob) {
job = tp->persistentJob;
tp->persistentJob = NULL;
tp->persistentThreads++;
persistent = 1;
ithread_cond_broadcast(&tp->start_and_shutdown);
} else {
tp->stats.workerThreads++;
persistent = 0;
/* Pick the highest priority job */
if (tp->highJobQ.size > 0) {
head = ListHead(&tp->highJobQ);
if (head == NULL) {
tp->stats.workerThreads--;
goto exit_function;
}
job = (ThreadPoolJob *) head->item;
CalcWaitTime(tp, HIGH_PRIORITY, job);
ListDelNode(&tp->highJobQ, head, 0);
} else if (tp->medJobQ.size > 0) {
head = ListHead(&tp->medJobQ);
if (head == NULL) {
tp->stats.workerThreads--;
goto exit_function;
}
job = (ThreadPoolJob *) head->item;
CalcWaitTime(tp, MED_PRIORITY, job);
ListDelNode(&tp->medJobQ, head, 0);
} else if (tp->lowJobQ.size > 0) {
head = ListHead(&tp->lowJobQ);
if (head == NULL) {
tp->stats.workerThreads--;
goto exit_function;
}
job = (ThreadPoolJob *) head->item;
CalcWaitTime(tp, LOW_PRIORITY, job);
ListDelNode(&tp->lowJobQ, head, 0);
} else {
/* Should never get here */
tp->stats.workerThreads--;
goto exit_function;
}
}
}
tp->busyThreads++;
ithread_mutex_unlock(&tp->mutex);
/* In the future can log info */
if (SetPriority(job->priority) != 0) {
} else {
}
/* run the job */
job->func(job->arg);
/* return to Normal */
SetPriority(DEFAULT_PRIORITY);
}
exit_function:
tp->totalThreads--;
ithread_cond_broadcast(&tp->start_and_shutdown);
ithread_mutex_unlock(&tp->mutex);
ithread_cleanup_thread();
return NULL;
}
/****************************************************************************
* Function: WorkerThread
*
* Description:
* Implements a thread pool worker.
* Worker waits for a job to become available.
* Worker picks up persistent jobs first, high priority, med priority,
* then low priority.
* If worker remains idle for more than specified max, the worker
* is released.
* Internal Only.
* Parameters:
* void * arg -> is cast to ThreadPool *
*****************************************************************************/
static void *WorkerThread( void *arg )
{
time_t start = 0;
ThreadPoolJob *job = NULL;
ListNode *head = NULL;
struct timespec timeout;
int retCode = 0;
int persistent = -1;
ThreadPool *tp = ( ThreadPool *) arg;
// allow static linking
#ifdef WIN32
#ifdef PTW32_STATIC_LIB
pthread_win32_thread_attach_np();
#endif
#endif
assert( tp != NULL );
// Increment total thread count
ithread_mutex_lock( &tp->mutex );
tp->totalThreads++;
ithread_cond_broadcast( &tp->start_and_shutdown );
ithread_mutex_unlock( &tp->mutex );
SetSeed();
StatsTime( &start );
while( 1 ) {
ithread_mutex_lock( &tp->mutex );
if( job ) {
FreeThreadPoolJob( tp, job );
job = NULL;
}
retCode = 0;
tp->stats.idleThreads++;
tp->stats.totalWorkTime += ( StatsTime( NULL ) - start ); // work time
StatsTime( &start ); // idle time
if( persistent == 1 ) {
// Persistent thread
// becomes a regular thread
tp->persistentThreads--;
}
if( persistent == 0 ) {
tp->stats.workerThreads--;
}
// Check for a job or shutdown
while( tp->lowJobQ.size == 0 &&
tp->medJobQ.size == 0 &&
tp->highJobQ.size == 0 &&
!tp->persistentJob &&
!tp->shutdown ) {
// If wait timed out
// and we currently have more than the
// min threads, or if we have more than the max threads
// (only possible if the attributes have been reset)
// let this thread die.
if( ( retCode == ETIMEDOUT &&
tp->totalThreads > tp->attr.minThreads ) ||
( tp->attr.maxThreads != -1 &&
tp->totalThreads > tp->attr.maxThreads ) ) {
tp->stats.idleThreads--;
tp->totalThreads--;
ithread_cond_broadcast( &tp->start_and_shutdown );
ithread_mutex_unlock( &tp->mutex );
#ifdef WIN32
#ifdef PTW32_STATIC_LIB
// allow static linking
pthread_win32_thread_detach_np ();
#endif
#endif
return NULL;
}
SetRelTimeout( &timeout, tp->attr.maxIdleTime );
// wait for a job up to the specified max time
retCode = ithread_cond_timedwait(
&tp->condition, &tp->mutex, &timeout );
}
tp->stats.idleThreads--;
tp->stats.totalIdleTime += ( StatsTime( NULL ) - start ); // idle time
StatsTime( &start ); // work time
// bump priority of starved jobs
BumpPriority( tp );
// if shutdown then stop
if( tp->shutdown ) {
tp->totalThreads--;
ithread_cond_broadcast( &tp->start_and_shutdown );
ithread_mutex_unlock( &tp->mutex );
#ifdef WIN32
#ifdef PTW32_STATIC_LIB
// allow static linking
pthread_win32_thread_detach_np ();
#endif
#endif
return NULL;
} else {
// Pick up persistent job if available
if( tp->persistentJob ) {
job = tp->persistentJob;
tp->persistentJob = NULL;
tp->persistentThreads++;
persistent = 1;
ithread_cond_broadcast( &tp->start_and_shutdown );
} else {
tp->stats.workerThreads++;
persistent = 0;
// Pick the highest priority job
if( tp->highJobQ.size > 0 ) {
head = ListHead( &tp->highJobQ );
job = ( ThreadPoolJob *) head->item;
CalcWaitTime( tp, HIGH_PRIORITY, job );
ListDelNode( &tp->highJobQ, head, 0 );
} else if( tp->medJobQ.size > 0 ) {
head = ListHead( &tp->medJobQ );
job = ( ThreadPoolJob *) head->item;
CalcWaitTime( tp, MED_PRIORITY, job );
ListDelNode( &tp->medJobQ, head, 0 );
} else if( tp->lowJobQ.size > 0 ) {
head = ListHead( &tp->lowJobQ );
job = ( ThreadPoolJob *) head->item;
CalcWaitTime( tp, LOW_PRIORITY, job );
ListDelNode( &tp->lowJobQ, head, 0 );
} else {
// Should never get here
assert( 0 );
tp->stats.workerThreads--;
tp->totalThreads--;
ithread_cond_broadcast( &tp->start_and_shutdown );
ithread_mutex_unlock( &tp->mutex );
return NULL;
}
}
}
ithread_mutex_unlock( &tp->mutex );
if( SetPriority( job->priority ) != 0 ) {
// In the future can log
// info
} else {
// In the future can log
// info
}
// run the job
job->func( job->arg );
// return to Normal
SetPriority( DEFAULT_PRIORITY );
}
}
/****************************************************************************
* Function: ThreadPoolRemove
*
* Description:
* Removes a job from the thread pool.
* Can only remove jobs which are not
* currently running.
* Parameters:
* tp - valid thread pool pointer
* jobId - id of job
* ThreadPoolJob *out - space for removed job.
* Can be null if not needed.
*
* Returns:
* 0 on success. INVALID_JOB_ID on failure.
*****************************************************************************/
int ThreadPoolRemove( ThreadPool *tp, int jobId, ThreadPoolJob *out )
{
ThreadPoolJob *temp = NULL;
int ret = INVALID_JOB_ID;
ListNode *tempNode = NULL;
ThreadPoolJob dummy;
assert( tp != NULL );
if( tp == NULL ) {
return EINVAL;
}
if( out == NULL ) {
out = &dummy;
}
dummy.jobId = jobId;
ithread_mutex_lock( &tp->mutex );
tempNode = ListFind( &tp->highJobQ, NULL, &dummy );
if( tempNode ) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode( &tp->highJobQ, tempNode, 0 );
FreeThreadPoolJob( tp, temp );
ithread_mutex_unlock( &tp->mutex );
return 0;
}
tempNode = ListFind( &tp->medJobQ, NULL, &dummy );
if( tempNode ) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode( &tp->medJobQ, tempNode, 0 );
FreeThreadPoolJob( tp, temp );
ithread_mutex_unlock( &tp->mutex );
return 0;
}
tempNode = ListFind( &tp->lowJobQ, NULL, &dummy );
if( tempNode ) {
temp = (ThreadPoolJob *)tempNode->item;
*out = *temp;
ListDelNode( &tp->lowJobQ, tempNode, 0 );
FreeThreadPoolJob( tp, temp );
ithread_mutex_unlock( &tp->mutex );
return 0;
}
if( tp->persistentJob && tp->persistentJob->jobId == jobId ) {
*out = *tp->persistentJob;
FreeThreadPoolJob( tp, tp->persistentJob );
tp->persistentJob = NULL;
ithread_mutex_unlock( &tp->mutex );
return 0;
}
ithread_mutex_unlock( &tp->mutex );
return ret;
}