protected char create(boolean key) {
long start = System.nanoTime();
char t = calculatable.calculate(owner, key);
long end = System.nanoTime();
miss(end - start);
save(key, t);
return t;
}
@Override
public char getOrCreate(boolean o) {
if (DependencyTracker.isBypassCaches()) {
return calculatable.calculate(owner, o);
} else {
lock(o);
try {
if (isCalculated(o)) {
DependencyTracker.mark(getDependencyNode());
hit();
return load(o);
}
DependencyNode callerNode = DependencyTracker.track(getDependencyNode());
try {
while (true) {
try {
return create(o);
} catch (ResourceOccupied e) {
if (callerNode != null) {
throw e;
} else {
unlock(o);
try {
e.getResource().waitForEndOfModification();
} finally {
lock(o);
}
if (isCalculated(o)) {
hit();
return load(o);
}
}
}
}
} finally {
DependencyTracker.exit(callerNode);
}
} finally {
unlock(o);
}
}
}