| 0,0 → 1,103 |
|---|
| /* |
| * 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 |
| */ |
| |
| /*************************************** |
| |
| Mutexs for the user. |
| |
| ***************************************/ |
| |
| /* |
| * CVS : $Id: mutex.h,v 1.2 2003-03-13 13:41:04 pj Exp $ |
| * |
| * File: $File$ |
| * Revision: $Revision: 1.2 $ |
| * Last update: $Date: 2003-03-13 13:41:04 $ |
| */ |
| |
| /* |
| * Copyright (C) 1999,2000 Massimiliano Giorgi |
| * |
| * 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 _MUTEX_H |
| #define _MUTEX_H |
| |
| /* |
| #include <hartik/const.h> |
| |
| typedef struct { |
| QUEUE queue; |
| int value; |
| } mutex_t; |
| |
| void mutex_init(mutex_t *); |
| void mutex_lock(mutex_t *); |
| int mutex_trylock(mutex_t *); |
| void mutex_unlock(mutex_t *); |
| */ |
| |
| /* |
| * temporary hack |
| */ |
| |
| #include <h/sys/kern.h> |
| #include <h/sys/const.h> |
| #include "ll/sys/cdefs.h" |
| |
| __BEGIN_DECLS |
| |
| /*+ a mutex object +*/ |
| typedef SEM mutex_t; |
| |
| /* |
| The following macros require a pointer to a mutex object and |
| return nothing. |
| */ |
| |
| /* Initialize a mutex object +*/ |
| #define mutex_init(ptr) { *(ptr)=sem_create(1); } |
| |
| /*+ Lock a mutex object +*/ |
| #define mutex_lock(ptr) { sem_wait(*(ptr),BLOCK); } |
| |
| /*+ Try to lock a mutex (return 0 on success locking) +*/ |
| #define mutex_trylock(ptr) { sem_wait(*(ptr),NON_BLOCK); } |
| |
| /*+ Unlock a mutex +*/ |
| #define mutex_unlock(ptr) { sem_signal(*(ptr)); } |
| |
| __END_DECLS |
| #endif |
| |