Rev 2 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* |
| 2 | * Project: HARTIK (HA-rd R-eal TI-me K-ernel) |
||
| 3 | * |
||
| 4 | * Coordinators: Giorgio Buttazzo <giorgio@sssup.it> |
||
| 5 | * Gerardo Lamastra <gerardo@sssup.it> |
||
| 6 | * |
||
| 7 | * Authors : Massimiliano Giorgi <massy@hartik.sssup.it> |
||
| 8 | * (see authors.txt for full list of hartik's authors) |
||
| 9 | * |
||
| 10 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
||
| 11 | * |
||
| 12 | * http://www.sssup.it |
||
| 13 | * http://retis.sssup.it |
||
| 14 | * http://hartik.sssup.it |
||
| 15 | */ |
||
| 16 | |||
| 17 | /* |
||
| 18 | * Copyright (C) 1999 Massimiliano Giorgi |
||
| 19 | * |
||
| 20 | * This program is free software; you can redistribute it and/or modify |
||
| 21 | * it under the terms of the GNU General Public License as published by |
||
| 22 | * the Free Software Foundation; either version 2 of the License, or |
||
| 23 | * (at your option) any later version. |
||
| 24 | * |
||
| 25 | * This program is distributed in the hope that it will be useful, |
||
| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 28 | * GNU General Public License for more details. |
||
| 29 | * |
||
| 30 | * You should have received a copy of the GNU General Public License |
||
| 31 | * along with this program; if not, write to the Free Software |
||
| 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 33 | * |
||
| 34 | */ |
||
| 35 | |||
| 36 | /* |
||
| 37 | * CVS : $Id: rwlock.h,v 1.1.1.1 2002-03-29 14:12:50 pj Exp $ |
||
| 38 | * |
||
| 39 | * File: $File$ |
||
| 40 | * Revision: $Revision: 1.1.1.1 $ |
||
| 41 | * Last update: $Date: 2002-03-29 14:12:50 $ |
||
| 42 | */ |
||
| 43 | |||
| 44 | /**** |
||
| 45 | This file contains the prototypes of an implementation of a reader/writer's protocol. |
||
| 46 | ****/ |
||
| 47 | |||
| 48 | #ifndef __RWLOCK_H |
||
| 49 | #define __RWLOCK_H |
||
| 50 | |||
| 51 | #include <fs/mutex.h> |
||
| 52 | #include <fs/semaph.h> |
||
| 53 | |||
| 54 | typedef struct { |
||
| 55 | __mutex_t mutex; |
||
| 56 | int active_readers; |
||
| 57 | int active_writers; |
||
| 58 | int blocked_readers; |
||
| 59 | int blocked_writers; |
||
| 60 | __sem_t readers_semaph; |
||
| 61 | __sem_t writers_semaph; |
||
| 62 | } __rwlock_t; |
||
| 63 | |||
| 64 | void __rwlock_init(__rwlock_t *ptr); |
||
| 65 | void __rwlock_rdlock(__rwlock_t *ptr); |
||
| 66 | void __rwlock_wrlock(__rwlock_t *ptr); |
||
| 67 | int __rwlock_tryrdlock(__rwlock_t *ptr); |
||
| 68 | int __rwlock_trywrlock(__rwlock_t *ptr); |
||
| 69 | void __rwlock_rdunlock(__rwlock_t *ptr); |
||
| 70 | void __rwlock_wrunlock(__rwlock_t *ptr); |
||
| 71 | |||
| 72 | #endif |