bool ConcurrentTableSharedStore::get(CStrRef key, Variant &value) { const StoreValue *sval; SharedVariant *svar = NULL; ConditionalReadLock l(m_lock, !RuntimeOption::ApcConcurrentTableLockFree || m_lockingFlag); bool expired = false; bool promoteObj = false; { Map::const_accessor acc; if (!m_vars.find(acc, key.data())) { log_apc(std_apc_miss); return false; } else { sval = &acc->second; if (sval->expired()) { // Because it only has a read lock on the data, deletion from // expiration has to happen after the lock is released expired = true; } else { if (!sval->inMem()) { std::lock_guard<SmallLock> sval_lock(sval->lock); if (!sval->inMem()) { svar = unserialize(key, sval); if (!svar) return false; } else { svar = sval->var; } } else { svar = sval->var; } if (RuntimeOption::ApcAllowObj && svar->is(KindOfObject)) { // Hold ref here for later promoting the object svar->incRef(); promoteObj = true; } value = svar->toLocal(); stats_on_get(key.get(), svar); } } } if (expired) { log_apc(std_apc_miss); eraseImpl(key, true); return false; } log_apc(std_apc_hit); if (promoteObj) { handlePromoteObj(key, svar, value); // release the extra ref svar->decRef(); } return true; }