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/*
* Project: S.Ha.R.K.
*
* Coordinators:
* Giorgio Buttazzo <giorgio@sssup.it>
* Paolo Gai <pj@gandalf.sssup.it>
*
* Authors :
* Paolo Gai <pj@gandalf.sssup.it>
* Massimiliano Giorgi <massy@gandalf.sssup.it>
* Luca Abeni <luca@gandalf.sssup.it>
* (see the web pages for full authors list)
*
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
*
* http://www.sssup.it
* http://retis.sssup.it
* http://shark.sssup.it
*/
/**
------------
CVS : $Id: nop.h,v 1.2 2003-01-07 17:12:20 pj Exp $
File: $File$
Revision: $Revision: 1.2 $
Last update: $Date: 2003-01-07 17:12:20 $
------------
This file contains the No Protocol (NOP) implementation of mutexes
Title:
NOP (Binary Semaphores)
Resource Models Accepted:
None
Description:
This module implement a mutex interface using extraction and insertion
into scheduling queues.
Exceptions raised:
none
Restrictions & special features:
- This module is NOT Posix compliant
- This module can manage any number of NOP mutexes.
- A NOP mutex can be statically allocated. To do this, the init function
have to define a macro that puts this information in the mutex
descriptor: mutexlevel = <NOP resource level>; opt = NULL;
for example, if the NOP module is registered at level 1, the macro is
like:
#define MUTEX_INITIALIZER {1,(void *)NULL}
**/
/*
* Copyright (C) 2000 Paolo Gai
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __NOP_H__
#define __NOP_H__
#include <kernel/types.h>
RLEVEL NOP_register_module(void);
#endif