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| 2 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | ------------ |
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| 23 | CVS : $Id: mqueue.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $ |
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| 24 | |||
| 25 | File: $File$ |
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| 26 | Revision: $Revision: 1.1.1.1 $ |
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| 27 | Last update: $Date: 2002-03-29 14:12:51 $ |
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| 28 | ------------ |
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| 29 | |||
| 30 | POSIX message queues: |
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| 31 | |||
| 32 | - mq names have not a correspondence into the File System. |
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| 33 | - a message queue can only be opened with the O_RDWR flag |
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| 34 | (there is only a process!!!) |
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| 35 | |||
| 36 | **/ |
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| 37 | |||
| 38 | /* |
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| 39 | * Copyright (C) 2000 Paolo Gai |
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| 40 | * |
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| 41 | * This program is free software; you can redistribute it and/or modify |
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| 42 | * it under the terms of the GNU General Public License as published by |
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| 43 | * the Free Software Foundation; either version 2 of the License, or |
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| 44 | * (at your option) any later version. |
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| 45 | * |
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| 46 | * This program is distributed in the hope that it will be useful, |
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| 47 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 48 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 49 | * GNU General Public License for more details. |
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| 50 | * |
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| 51 | * You should have received a copy of the GNU General Public License |
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| 52 | * along with this program; if not, write to the Free Software |
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| 53 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 54 | * |
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| 55 | */ |
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| 56 | |||
| 57 | #ifndef __MQUEUE_H__ |
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| 58 | #define __MQUEUE_H__ |
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| 59 | |||
| 60 | #include <sys/types.h> |
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| 61 | #include <fcntl.h> |
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| 62 | #include <time.h> |
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| 63 | #include <signal.h> |
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| 64 | |||
| 65 | typedef int mqd_t; |
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| 66 | |||
| 67 | struct mq_attr { |
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| 68 | long mq_flags; /* Message queue flags */ |
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| 69 | long mq_maxmsg; /* maximum number of messages */ |
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| 70 | long mq_msgsize; /* Maximum message size */ |
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| 71 | long mq_curmsgs; /* Number of messages currently queued */ |
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| 72 | }; |
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| 73 | |||
| 74 | // non-standard defaults limits used into mq_open when no mqstat is defined |
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| 75 | #define MQ_DEFAULT_MAXMSG 10 |
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| 76 | #define MQ_DEFAULT_MSGSIZE 128 |
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| 77 | |||
| 78 | |||
| 79 | // defined into the POSIX Standard, 15.1.1 |
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| 80 | |||
| 81 | mqd_t mq_open(const char *name, int oflag, ...); |
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| 82 | int mq_close(mqd_t mqdes); |
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| 83 | int mq_unlink(const char *name); |
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| 84 | int mq_send(mqd_t mqdes, const char *msg_ptr, size_t msg_len, |
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| 85 | unsigned int msg_prio); |
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| 86 | ssize_t mq_receive(mqd_t mqdes, char *msg_ptr, size_t msg_len, |
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| 87 | unsigned int *msg_prio); |
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| 88 | int mq_notify(mqd_t mqdes, const struct sigevent *notification); |
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| 89 | int mq_setattr(mqd_t mqdes, const struct mq_attr *mqstat, |
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| 90 | struct mq_attr *omqstat); |
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| 91 | int mq_getattr(mqd_t mqdes, struct mq_attr *mqstat); |
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| 92 | |||
| 93 | #endif |