VersionRWLock.h

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#ifndef VERSIONRWLOCK_H
#define VERSIONRWLOCK_H 

#include  <iostream>
#include  <pthread.h>
#include  <stdio.h>

#include  "common.h"

using namespace Borealis;


class VersionRWLock
{
  public:
    VersionRWLock();

    int32  readVersion(); 

    bool  verifyVersion( int32  version );

    void  writeLock();

    void  writeUnLock(); 

  private:
    pthread_mutex_t  mutex;
    pthread_cond_t   readOK;

    int32  _version;
    int32  _writers;
};

#endif                          // VERSIONRWLOCK_H

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