ScopedCheckedOutSession SessionCatalog::checkOutSession(OperationContext* opCtx) {
invariant(!opCtx->lockState()->isLocked());
invariant(opCtx->getLogicalSessionId());
const auto& lsid = *opCtx->getLogicalSessionId();
stdx::unique_lock<stdx::mutex> ul(_mutex);
auto sri = _getOrCreateSessionRuntimeInfo(opCtx, lsid, ul);
// Wait until the session is no longer in use
opCtx->waitForConditionOrInterrupt(
sri->availableCondVar, ul, [&sri]() { return sri->state != SessionRuntimeInfo::kInUse; });
invariant(sri->state == SessionRuntimeInfo::kAvailable);
sri->state = SessionRuntimeInfo::kInUse;
return ScopedCheckedOutSession(opCtx, ScopedSession(std::move(sri)));
}
ScopedSession SessionCatalog::checkOutSession(OperationContext* opCtx) {
invariant(!opCtx->lockState()->isLocked());
invariant(opCtx->getLogicalSessionId());
const auto lsid = *opCtx->getLogicalSessionId();
stdx::unique_lock<stdx::mutex> ul(_mutex);
auto it = _txnTable.find(lsid);
if (it == _txnTable.end()) {
it = _txnTable.emplace(lsid, std::make_shared<SessionRuntimeInfo>(lsid)).first;
}
auto sri = it->second;
// Wait until the session is no longer in use
opCtx->waitForConditionOrInterrupt(
sri->availableCondVar, ul, [sri]() { return sri->state != SessionRuntimeInfo::kInUse; });
invariant(sri->state == SessionRuntimeInfo::kAvailable);
sri->state = SessionRuntimeInfo::kInUse;
return ScopedSession(opCtx, std::move(sri));
}
ScopedSession SessionCatalog::getOrCreateSession(OperationContext* opCtx,
const LogicalSessionId& lsid) {
stdx::unique_lock<stdx::mutex> ul(_mutex);
return ScopedSession(_getOrCreateSessionRuntimeInfo(opCtx, lsid, ul));
}
