| 0,0 → 1,100 |
|---|
| /* |
| * 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: pistar.h,v 1.1 2004-09-01 08:42:15 trimarchi Exp $ |
| |
| File: $File$ |
| Revision: $Revision: 1.1 $ |
| Last update: $Date: 2004-09-01 08:42:15 $ |
| ------------ |
| |
| This file contains the Priority Inheritance (PI) Protocol |
| |
| Title: |
| PI (Priority Inheritance protocol) |
| |
| Resource Models Accepted: |
| None |
| |
| Description: |
| This module implement the Priority Inheritance Protocol. |
| The priority inheritance is made using the shadow field of the |
| task descriptor. No difference is made upon the task model of the |
| tasks that use PISTAR mutexes. |
| |
| A PISTAR mutex is created passing the PISTAR_mutexattr structure to mutex_init. |
| |
| Exceptions raised: |
| XMUTEX_OWNER_KILLED |
| This exception is raised when a task ends and it owns one or more |
| mutexes |
| |
| Restrictions & special features: |
| - This module is NOT Posix compliant |
| - This module can manage any number of PISTAR mutexes. |
| - If a task ends (because it reaches the end of the body or because it |
| is killed by someone) and it owns some mutex, an exception is raised. |
| - if a mutex unlock is called on a mutex not previously |
| locked or previously locked by another task an exception is raised |
| - A PISTAR 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 = <PISTAR resource level>; opt = NULL; |
| for example, if the PISTAR module is registered at level 1, the macro is |
| like: |
| #define MUTEX_INITIALIZER {1,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 __PISTAR_H__ |
| #define __PISTAR_H__ |
| |
| #include <kernel/types.h> |
| #include "ll/sys/cdefs.h" |
| |
| __BEGIN_DECLS |
| |
| RLEVEL PISTAR_register_module(void); |
| |
| __END_DECLS |
| #endif |