Source code

/******************************************************************************
 *
 * Copyright (c) 2014 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 *  
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
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 *
 *
 *  KeyedSemaphore.h
 *
 *****************************************************************************/


#pragma once


#include <es++/Object.h>
#include <es++/Exception.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>

#include <es++/Semaphore.h>

namespace Es {

class KeyedSemaphore :public Semaphore {

public:
  KeyedSemaphore()
  :Semaphore()
  {
  }

public:
  KeyedSemaphore(key_t key, int num=1, int semflg=(DEFAULT_PERMISSION|IPC_CREAT) )
  :Semaphore(key, num, semflg)
  {
  }

public:
  /*For example, ftok can be used to generate a key to be passed to the first
   argument of this Contstructor.
    key_t key = ftok(fullpath, id);
   KeyedSemaphore(key);
   */
  int create(key_t key, int num=1, int semflg=(DEFAULT_PERMISSION|IPC_CREAT) )
  {
    return Semaphore::create(key, num, semflg);
  }


public:
  ~KeyedSemaphore()
  {
  }

};

}