s.writeObject(e.value());
boolean replace(K key, int hash, V oldValue, V newValue) { lock(); try { removeStale(); HashEntry<K,V> e = getFirst(hash); while (e != null && (e.hash != hash || !keyEq(key, e.key()))) e = e.next; boolean replaced = false; if (e != null && oldValue.equals(e.value())) { replaced = true; e.setValue(newValue, valueType, refQueue); } return replaced; } finally { unlock(); } }
newTable[k] = newHashEntry(key, p.hash, n, p.value());
oldValue = e.value(); if (!onlyIfAbsent || oldValue == null) // null = gc AFTER stale removal e.setValue(value, valueType, refQueue);
V replace(K key, int hash, V newValue) { lock(); try { removeStale(); HashEntry<K,V> e = getFirst(hash); while (e != null && (e.hash != hash || !keyEq(key, e.key()))) e = e.next; V oldValue = null; if (e != null) { oldValue = e.value(); e.setValue(newValue, valueType, refQueue); } return oldValue; } finally { unlock(); } }
/** * Reads value field of an entry under lock. Called if value * field ever appears to be null. This is possible only if a * compiler happens to reorder a HashEntry initialization with * its table assignment, which is legal under memory model * but is not known to ever occur. */ V readValueUnderLock(HashEntry<K,V> e) { lock(); try { removeStale(); return e.value(); } finally { unlock(); } }