distlock.h

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// distlock.h

/*    Copyright 2009 10gen Inc.
 *
 *    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.
 */

#pragma once

#include "../pch.h"
#include "dbclient.h"
#include "connpool.h"
#include "redef_macros.h"
#include "syncclusterconnection.h"

namespace mongo {

    class DistributedLock {
    public:

        DistributedLock( const ConnectionString& conn , const string& name , unsigned takeoverMinutes = 15 );

        bool lock_try( string why , BSONObj * other = 0 );

        void unlock();

    private:
        ConnectionString _conn;
        string _name;
        unsigned _takeoverMinutes;

        string _ns;
        BSONObj _id;
    };

    class dist_lock_try {
    public:
        dist_lock_try( DistributedLock * lock , string why )
            : _lock(lock) {
            _got = _lock->lock_try( why , &_other );
        }

        ~dist_lock_try() {
            if ( _got ) {
                _lock->unlock();
            }
        }

        bool got() const { return _got; }
        BSONObj other() const { return _other; }

    private:
        DistributedLock * _lock;
        bool _got;
        BSONObj _other;
    };

}

---

mongodb
Author(s): Nate Koenig
autogenerated on Fri Jan 11 12:15:18 2013