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;
}
HOT_FUNC
CVarRef SharedMap::getValueRef(ssize_t pos) const {
SharedVariant *sv = getValueImpl(pos);
DataType t = sv->getType();
if (!IS_REFCOUNTED_TYPE(t)) return sv->asCVarRef();
if (LIKELY(m_localCache != nullptr)) {
assert(unsigned(pos) < size());
TypedValue* tv = &m_localCache[pos];
if (tv->m_type != KindOfUninit) return tvAsCVarRef(tv);
} else {
static_assert(KindOfUninit == 0, "must be 0 since we use smart_calloc");
m_localCache = (TypedValue*) smart_calloc(size(), sizeof(TypedValue));
}
TypedValue* tv = &m_localCache[pos];
tvAsVariant(tv) = sv->toLocal();
assert(tv->m_type != KindOfUninit);
return tvAsCVarRef(tv);
}
HOT_FUNC
CVarRef SharedMap::getValueRef(ssize_t pos) const {
SharedVariant *sv = m_arr->getValue(pos);
DataType t = sv->getType();
if (!IS_REFCOUNTED_TYPE(t)) return sv->asCVarRef();
if (LIKELY(m_localCache != NULL)) {
Variant *pv;
ArrayData *escalated DEBUG_ONLY =
m_localCache->ZendArray::lvalPtr((int64)pos, pv, false, false);
assert(!escalated);
if (pv) return *pv;
} else {
m_localCache = NEW(ZendArray)();
m_localCache->incRefCount();
}
Variant v = sv->toLocal();
Variant *r;
ArrayData *escalated DEBUG_ONLY =
m_localCache->ZendArray::addLval((int64)pos, r, false);
assert(!escalated);
*r = v;
return *r;
}
bool ConcurrentTableSharedStore::get(CStrRef key, Variant &value) {
bool stats = RuntimeOption::EnableStats && RuntimeOption::EnableAPCStats;
bool statsFetch = RuntimeOption::EnableAPCSizeStats &&
RuntimeOption::EnableAPCFetchStats;
const StoreValue *val;
SharedVariant *svar = NULL;
ReadLock l(m_lock);
bool expired = false;
{
Map::const_accessor acc;
if (!m_vars.find(acc, key.data())) {
if (stats) ServerStats::Log("apc.miss", 1);
return false;
} else {
val = &acc->second;
if (val->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 {
svar = val->var;
if (RuntimeOption::ApcAllowObj) {
// Hold ref here
svar->incRef();
}
value = svar->toLocal();
if (statsFetch) {
SharedStoreStats::onGet(key.get(), svar);
}
}
}
}
if (expired) {
if (stats) {
ServerStats::Log("apc.miss", 1);
}
eraseImpl(key, true);
return false;
}
if (stats) {
ServerStats::Log("apc.hit", 1);
}
if (RuntimeOption::ApcAllowObj) {
bool statsDetail = RuntimeOption::EnableAPCSizeStats &&
RuntimeOption::EnableAPCSizeGroup;
SharedVariant *converted = svar->convertObj(value);
if (converted) {
Map::accessor acc;
m_vars.find(acc, key.data()); // start a write lock
StoreValue *sval = &acc->second;
SharedVariant *sv = sval->var;
// sv may not be same as svar here because some other thread may have
// updated it already, check before updating
if (!sv->isUnserializedObj()) {
if (statsDetail) {
SharedStoreStats::onDelete(key.get(), sv, true);
}
sval->var = converted;
sv->decRef();
if (RuntimeOption::EnableAPCSizeStats) {
int32 newSize = converted->getSpaceUsage();
SharedStoreStats::updateDirect(sval->size, newSize);
sval->size = newSize;
}
if (statsDetail) {
int64 ttl = sval->expiry ? sval->expiry - time(NULL) : 0;
SharedStoreStats::onStore(key.get(), converted, ttl, false);
}
} else {
converted->decRef();
}
}
// release the extra ref
svar->decRef();
}
return true;
}