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/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/db/concurrency/locker.h"
namespace mongo {
/**
* Locker, which cannot be used to lock/unlock resources and just returns true for checks for
* whether a particular resource is locked. Do not use it for cases where actual locking
* behaviour is expected or locking is performed.
*/
class LockerNoop : public Locker {
public:
LockerNoop() {}
virtual LockerId getId() const {
invariant(false);
}
virtual LockResult lockGlobal(LockMode mode, unsigned timeoutMs) {
invariant(false);
}
virtual LockResult lockGlobalBegin(LockMode mode) {
invariant(false);
}
virtual LockResult lockGlobalComplete(unsigned timeoutMs) {
invariant(false);
}
virtual void lockMMAPV1Flush() {
invariant(false);
}
virtual bool unlockAll() {
invariant(false);
}
virtual void downgradeGlobalXtoSForMMAPV1() {
invariant(false);
}
virtual void beginWriteUnitOfWork() {}
virtual void endWriteUnitOfWork() {}
virtual bool inAWriteUnitOfWork() const {
invariant(false);
}
virtual LockResult lock(ResourceId resId,
LockMode mode,
unsigned timeoutMs,
bool checkDeadlock) {
invariant(false);
}
virtual void downgrade(ResourceId resId, LockMode newMode) {
invariant(false);
}
virtual bool unlock(ResourceId resId) {
invariant(false);
}
virtual LockMode getLockMode(ResourceId resId) const {
invariant(false);
}
virtual bool isLockHeldForMode(ResourceId resId, LockMode mode) const {
return true;
}
virtual bool isDbLockedForMode(StringData dbName, LockMode mode) const {
return true;
}
virtual bool isCollectionLockedForMode(StringData ns, LockMode mode) const {
return true;
}
virtual ResourceId getWaitingResource() const {
invariant(false);
}
virtual void getLockerInfo(LockerInfo* lockerInfo) const {
invariant(false);
}
virtual bool saveLockStateAndUnlock(LockSnapshot* stateOut) {
invariant(false);
}
virtual void restoreLockState(const LockSnapshot& stateToRestore) {
invariant(false);
}
virtual void dump() const {
invariant(false);
}
virtual bool isW() const {
invariant(false);
}
virtual bool isR() const {
invariant(false);
}
virtual bool isLocked() const {
return false;
}
virtual bool isWriteLocked() const {
return false;
}
virtual bool isReadLocked() const {
invariant(false);
}
virtual void assertEmptyAndReset() {
invariant(false);
}
virtual bool hasLockPending() const {
invariant(false);
}
virtual void setIsBatchWriter(bool newValue) {
invariant(false);
}
virtual bool isBatchWriter() const {
invariant(false);
}
virtual bool hasStrongLocks() const {
return false;
}
};
} // namespace mongo
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