public ParallelRegion(int threadNum, NativeThreadPool<OMPThread> pool) {
long start = System.currentTimeMillis();
if (threadNum < 1) {
throw new IllegalArgumentException("Thread number must be > 0");
}
this.pool = pool;
team = new OMPThread[threadNum];
finalBarrier = new CyclicBarrier(threadNum);
// Check if already inside a parallel region
OMPThread master = OMPEngine.getInstance().tryGetOmpThread();
if (master != null) {
parent = master.getActiveRegion();
levelNumber = parent.getLevelNumber() + 1;
team[0] = master;
team[0].setLevel(new Level(master.getLevel(), 0, this));
} else {
team[0] = new OMPThread(new Level(0, this), pool);
}
for (int i = 1; i < threadNum; i++) {
team[i] = new OMPThread(new Level(i, this), pool);
}
LoggingUtils.debug(log, "Initializing parallel region " + (System.currentTimeMillis() - start));
}
public void runParallel(ParallelTask task) {
long start = System.currentTimeMillis();
if (active) {
throw new IllegalStateException("Unable to run already active parallel region");
}
for (OMPThread t : team) {
t.setRootTask(TaskFactory.newTiedTask(task));
}
active = true;
for (int i = 1; i < team.length; i++) {
pool.executeTask(team[i]);
}
LoggingUtils.debug(log, "Starting tasks " + (System.currentTimeMillis() - start));
team[0].run();
start = System.currentTimeMillis();
if (!tasks.isEmpty()) {
throw new OMPRuntimeException(
"Parallel region finished bu there are some tasks waiting to execute!");
}
active = false;
barriers.clear();
forLoops.clear();
singles.clear();
pool.kill();
LoggingUtils.debug(log, "Killing region " + (System.currentTimeMillis() - start));
if (levelNumber > 1) {
team[0].setLevel(team[0].getLevel().getParent());
OMPEngine.getInstance().putJavaOmpThreadRelation(team[0]);
}
}