mirror of https://github.com/BOINC/boinc.git
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
// Berkeley Open Infrastructure for Network Computing
|
|
// http://boinc.berkeley.edu
|
|
// Copyright (C) 2005 University of California
|
|
//
|
|
// This is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation;
|
|
// either version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This software 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 Lesser General Public License for more details.
|
|
//
|
|
// To view the GNU Lesser General Public License visit
|
|
// http://www.gnu.org/copyleft/lesser.html
|
|
// or write to the Free Software Foundation, Inc.,
|
|
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
// interfaces for accessing message queues
|
|
|
|
#include "config.h"
|
|
#include <cstdio>
|
|
#include <cstring>
|
|
|
|
#include "msg_queue.h"
|
|
|
|
int create_message_queue(key_t key) {
|
|
int mq_id;
|
|
|
|
mq_id = msgget(key, IPC_CREAT | IPC_EXCL | 0666);
|
|
if (mq_id < 0) {
|
|
perror("create_message_queue: msgget");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int receive_message(key_t key, void *msg, size_t msg_size, bool wait) {
|
|
int mq_id, retval;
|
|
|
|
mq_id = msgget(key, 0666);
|
|
if (mq_id < 0) {
|
|
perror("receive_message: msgget");
|
|
return -1;
|
|
}
|
|
|
|
retval = msgrcv(mq_id, msg, msg_size, 0, (wait?0:IPC_NOWAIT));
|
|
if (retval < 0) {
|
|
perror("receive_message: msgrcv");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int send_message(key_t key, void *msg, size_t msg_size, bool wait) {
|
|
int mq_id, retval;
|
|
|
|
mq_id = msgget(key, 0666);
|
|
if (mq_id < 0) {
|
|
perror("send_message: msgget");
|
|
return -1;
|
|
}
|
|
|
|
retval = msgsnd(mq_id, msg, msg_size, (wait?0:IPC_NOWAIT));
|
|
if (retval < 0) {
|
|
perror("send_message: msgsnd");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int destroy_message_queue(key_t key) {
|
|
int mq_id, retval;
|
|
|
|
mq_id = msgget(key, 0666);
|
|
if (mq_id < 0) {
|
|
perror("delete_message_queue: msgget");
|
|
return -1;
|
|
}
|
|
retval = msgctl(mq_id, IPC_RMID, NULL);
|
|
if (retval) {
|
|
perror("delete_message_queue: msgctl");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
const char *BOINC_RCSID_7b5e8a534b = "$Id$";
|