pep_ipc.H

/* pep_ipc.H */
/* $Id: pep_ipc.H,v 1.3 2003/03/17 10:03:17 vlad Exp $ */
#ifndef __pep_ipc_H
#define __pep_ipc_H

#include <mix/mutex.h>
#include <csi/keysourcer.h>


class ObjectIPC
{
private:

  key_t     access_k;   
protected:

  void      new_key ()
    {  access_k = KS_GetUniqueKey();  }

public:

  ObjectIPC ()
    {  new_key();  }

  ObjectIPC (key_t id_k)
    {  access_k = id_k;  }

  virtual key_t     key ()
    {  return access_k;  }

  virtual int   attach_cnt ()
    {  return 0;  }

};


class LockBlock : public ObjectIPC
{
private:

  int   sem_id;     
  MutexId   mxid;   
  Logic destroy_flag;   
public:

  LockBlock (int elem_cnt, key_t k_sem);
  LockBlock (int elem_cnt);
  virtual ~LockBlock ();

  void  lock (int id);

  void  unlock (int id);

  int   resources ();

  void  force_destroy ()
    {  destroy_flag = TRUE;  }

  virtual int   attach_cnt ();

};


#endif /* pep_ipc.H */