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libupnp and multi-flows scenario patch

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Submited by Carlo Parata from STMicroelectronics.
Hi Roberto and Nektarios,
after an analysis of the problem of libupnp with a multi-flows scenario, I
noticed that the only cause of the freezed system is the ThreadPool
management. There are not mutex problems. In practise, if all threads in the
thread pool are busy executing jobs, a new worker thread should be created if
a job is scheduled (I inspired to tombupnp library). So I solved the problem
with a little patch in threadutil library that you can find attached in this
e-mail. I hope to have helped you.



git-svn-id: https://pupnp.svn.sourceforge.net/svnroot/pupnp/trunk@514 119443c7-1b9e-41f8-b6fc-b9c35fce742c
This commit is contained in:
Marcelo Roberto Jimenez
2010-03-21 19:47:19 +00:00
parent b26fe55772
commit bf169e434c
3 changed files with 34 additions and 18 deletions
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11
threadutil/src/ThreadPool.c
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@@ -472,6 +472,7 @@ static void *WorkerThread( void *arg )
while( 1 ) {
ithread_mutex_lock( &tp->mutex );
if( job ) {
tp->busyThreads--;
FreeThreadPoolJob( tp, job );
job = NULL;
}
@@ -584,6 +585,7 @@ static void *WorkerThread( void *arg )
}
}
tp->busyThreads++;
ithread_mutex_unlock( &tp->mutex );
if( SetPriority( job->priority ) != 0 ) {
@@ -688,7 +690,7 @@ static int CreateWorker( ThreadPool *tp )
* ThreadPool* tp
*
*****************************************************************************/
static void AddWorker( ThreadPool *tp )
static void AddWorker(ThreadPool *tp)
{
int jobs = 0;
int threads = 0;
@@ -697,8 +699,10 @@ static void AddWorker( ThreadPool *tp )
jobs = tp->highJobQ.size + tp->lowJobQ.size + tp->medJobQ.size;
threads = tp->totalThreads - tp->persistentThreads;
while( threads == 0 || (jobs / threads) >= tp->attr.jobsPerThread ) {
if( CreateWorker( tp ) != 0 ) {
while (threads == 0 ||
(jobs / threads) >= tp->attr.jobsPerThread ||
(tp->totalThreads == tp->busyThreads) ) {
if (CreateWorker(tp) != 0) {
return;
}
threads++;
@@ -804,6 +808,7 @@ int ThreadPoolInit( ThreadPool *tp, ThreadPoolAttr *attr )
tp->lastJobId = 0;
tp->shutdown = 0;
tp->totalThreads = 0;
tp->busyThreads = 0;
tp->persistentThreads = 0;
for( i = 0; i < tp->attr.minThreads; ++i ) {
if( ( retCode = CreateWorker( tp ) ) != 0 ) {