rocketmq-client4cpp/src/kpr/Mutex.h

/**
 * Copyright (C) 2013 kangliqiang ,kangliq@163.com
 *
 * Licensed 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 __KPR_MUTEX_H__
#define __KPR_MUTEX_H__

#include "KPRTypes.h"
#include <errno.h>

namespace kpr
{
class Mutex
{
public:
    Mutex();
    ~Mutex();

    void Lock()const;
    void Unlock()const;
    bool TryLock()const;
	bool TryLock(int timeout) const;

    ThreadId GetOwner()const;

private:
    Mutex(const Mutex&);
    const Mutex& operator=(const Mutex&);

    mutable pthread_mutex_t m_mutex;
    friend class Condition;
};

class RWMutex
{
public:
    RWMutex();
    ~RWMutex();

    void ReadLock()const;
    void WriteLock()const;
    bool TryReadLock()const;
	bool TryReadLock(int timeout) const;
    bool TryWriteLock()const;
	bool TryWriteLock(int timeout)const;
    void Unlock()const;

    ThreadId GetOwner()const;

private:
    RWMutex(const RWMutex&);
    const RWMutex& operator=(const RWMutex&);

    mutable pthread_rwlock_t m_mutex;
    friend class Condition;
};

class RecursiveMutex
{
public:
    RecursiveMutex();
    ~RecursiveMutex();

    bool Lock()const;
    bool Unlock()const;
    bool TryLock()const;

    ThreadId GetOwner()const;

    unsigned int GetCount()const
    {
        return m_count;
    }

private:
    RecursiveMutex(const RecursiveMutex&);

    const RecursiveMutex& operator=(const RecursiveMutex&);

    bool  lock(int count);
    bool  tryLock();
    bool unlock();

    unsigned int reset4Condvar();

private:
    pthread_mutex_t m_mutex;
    Mutex m_internal;
    mutable unsigned int m_count;
    mutable ThreadId m_owner;

    friend class Condition;
    friend class ConditionHelper;
};
}
#endif