void LockerImpl::restoreWriteUnitOfWork(OperationContext* opCtx,
const LockSnapshot& stateToRestore) {
if (stateToRestore.globalMode != MODE_NONE) {
restoreLockState(opCtx, stateToRestore);
}
invariant(_numResourcesToUnlockAtEndUnitOfWork == 0);
for (auto it = _requests.begin(); it; it.next()) {
invariant(_shouldDelayUnlock(it.key(), (it->mode)));
invariant(it->unlockPending == 0);
it->unlockPending++;
}
_numResourcesToUnlockAtEndUnitOfWork = static_cast<unsigned>(_requests.size());
beginWriteUnitOfWork();
}
bool LockerImpl<IsForMMAPV1>::unlock(ResourceId resId) {
LockRequestsMap::Iterator it = _requests.find(resId);
if (inAWriteUnitOfWork() && _shouldDelayUnlock(it.key(), (it->mode))) {
if (!it->unlockPending) {
_numResourcesToUnlockAtEndUnitOfWork++;
}
it->unlockPending++;
// unlockPending will only be incremented if a lock is converted and unlock() is called
// multiple times on one ResourceId.
invariant(it->unlockPending < LockModesCount);
return false;
}
// Don't attempt to unlock twice. This can happen when an interrupted global lock is destructed.
if (it.finished())
return false;
return _unlockImpl(&it);
}
