SF Tracker [ 1628562 ] Maximum total jobs patch

Submitted By: 
Fredrik Svensson - svefredrik

Incremented the libray versions and included some comments in the file
configure.ac so that we do not bump the library version excessively,
only the necessary numbers on the next release.



git-svn-id: https://pupnp.svn.sourceforge.net/svnroot/pupnp/trunk@115 119443c7-1b9e-41f8-b6fc-b9c35fce742c

threadutil/src/ThreadPool.c

@@ -906,6 +906,7 @@ tp->stats.totalJobsLQ++; tp->stats.totalTimeLQ += diff; break; default:
         int rc = EOUTOFMEM;
 
         int tempId = -1;
+        int totalJobs;
 
         ThreadPoolJob *temp = NULL;
 
@@ -922,6 +923,13 @@ tp->stats.totalJobsLQ++; tp->stats.totalTimeLQ += diff; break; default:
                 || ( job->priority == MED_PRIORITY )
                 || ( job->priority == HIGH_PRIORITY ) );
 
+        totalJobs = tp->highJobQ.size + tp->lowJobQ.size + tp->medJobQ.size;
+        if (totalJobs >= tp->attr.maxJobsTotal) {
+            fprintf(stderr, "total jobs = %d, too many jobs", totalJobs);
+            ithread_mutex_unlock( &tp->mutex );
+            return rc;
+        }
+
         if( jobId == NULL )
             jobId = &tempId;
 
@@ -1267,6 +1275,7 @@ tp->stats.totalJobsLQ++; tp->stats.totalTimeLQ += diff; break; default:
         attr->minThreads = DEFAULT_MIN_THREADS;
         attr->schedPolicy = DEFAULT_POLICY;
         attr->starvationTime = DEFAULT_STARVATION_TIME;
+        attr->maxJobsTotal = DEFAULT_MAX_JOBS_TOTAL;
         return 0;
     }
 
@@ -1518,6 +1527,29 @@ tp->stats.totalJobsLQ++; tp->stats.totalTimeLQ += diff; break; default:
                        stats->totalIdleTime );}
 #endif
 
+ /****************************************************************************
+ * Function: TPAttrSetMaxJobsTotal
+ *
+ *  Description:
+ *      Sets the maximum number jobs that can be qeued totally.
+ *  Parameters:
+ *      attr - must be valid thread pool attributes.
+ *      maxJobsTotal - maximum number of jobs
+ *  Returns:
+ *      Always returns 0.
+ *****************************************************************************/
+    int TPAttrSetMaxJobsTotal( ThreadPoolAttr * attr,
+                               int  maxJobsTotal ) {
+        assert( attr != NULL );
+
+        if( attr == NULL ) {
+            return EINVAL;
+        }
+
+        attr->maxJobsTotal = maxJobsTotal;
+        return 0;
+    }
+
 /****************************************************************************
  * Function: ThreadPoolGetStats
  *