private WindowCache(final WindowCacheConfig cfg) {
super(tableSize(cfg), lockCount(cfg));
maxFiles = cfg.getPackedGitOpenFiles();
maxBytes = cfg.getPackedGitLimit();
mmap = cfg.isPackedGitMMAP();
windowSizeShift = bits(cfg.getPackedGitWindowSize());
windowSize = 1 << windowSizeShift;
openFiles = new AtomicInteger();
openBytes = new AtomicLong();
if (maxFiles < 1) throw new IllegalArgumentException("Open files must be >= 1");
if (maxBytes < windowSize) throw new IllegalArgumentException("Window size must be < limit");
}
private static int lockCount(final WindowCacheConfig cfg) {
return Math.max(cfg.getPackedGitOpenFiles(), 32);
}