// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#ifndef _ST_HPC_PPL_COMMON_LOCK_UTILS_H_
#define _ST_HPC_PPL_COMMON_LOCK_UTILS_H_

namespace ppl { namespace common {

class DummyLock final {
public:
    void ReadLock() {}
    void WriteLock() {}
    void Unlock() {}
};

template <typename T>
class ReadLockGuard final {
public:
    ReadLockGuard(T* lock) : lock_(lock) {
        lock->ReadLock();
    }
    ~ReadLockGuard() {
        lock_->Unlock();
    }

private:
    T* lock_;
};

template <typename T>
class WriteLockGuard final {
public:
    WriteLockGuard(T* lock) : lock_(lock) {
        lock->WriteLock();
    }
    ~WriteLockGuard() {
        lock_->Unlock();
    }

private:
    T* lock_;
};

}} // namespace ppl::common

#endif
