private static AffinityLock acquireCore(boolean bind, int cpuId, AffinityStrategy... strategies) {
synchronized (AffinityLock.class) {
for (AffinityStrategy strategy : strategies) {
LOOP:
for (AffinityLock[] als : CORES.descendingMap().values()) {
for (AffinityLock al : als)
if (!al.canReserve() || !strategy.matches(cpuId, al.cpuId)) continue LOOP;
final AffinityLock al = als[0];
al.assignCurrentThread(bind, true);
return al;
}
}
}
if (LOGGER.isLoggable(Level.WARNING))
LOGGER.warning("No reservable Core for " + Thread.currentThread());
return acquireLock(bind, cpuId, strategies);
}
private static AffinityLock acquireLock(boolean bind, int cpuId, AffinityStrategy... strategies) {
synchronized (AffinityLock.class) {
for (AffinityStrategy strategy : strategies) {
// consider all processors except cpu 0 which is usually used by the OS.
// if you have only one core, this library is not appropriate in any case.
for (int i = LOCKS.length - 1; i > 0; i--) {
AffinityLock al = LOCKS[i];
if (al.canReserve() && (cpuId < 0 || strategy.matches(cpuId, al.cpuId))) {
al.assignCurrentThread(bind, false);
return al;
}
}
}
}
if (LOGGER.isLoggable(Level.WARNING))
LOGGER.warning("No reservable CPU for " + Thread.currentThread());
return AffinityLock.NONE;
}
