mirror of https://github.com/BOINC/boinc.git
97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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// interfaces for accessing message queues
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#include "config.h"
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#include <cstdio>
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#include <cstring>
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#include <cstdlib>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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using std::perror;
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#include "msg_queue.h"
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int create_message_queue(key_t key) {
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int mq_id;
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mq_id = msgget(key, IPC_CREAT | IPC_EXCL | 0666);
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if (mq_id < 0) {
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perror("create_message_queue: msgget");
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return -1;
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}
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return 0;
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}
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int receive_message(key_t key, void *msg, size_t msg_size, bool wait) {
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int mq_id, retval;
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mq_id = msgget(key, 0666);
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if (mq_id < 0) {
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perror("receive_message: msgget");
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return -1;
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}
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retval = msgrcv(mq_id, msg, msg_size, 0, (wait?0:IPC_NOWAIT));
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if (retval < 0) {
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perror("receive_message: msgrcv");
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return -1;
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}
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return 0;
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}
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int send_message(key_t key, void *msg, size_t msg_size, bool wait) {
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int mq_id, retval;
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mq_id = msgget(key, 0666);
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if (mq_id < 0) {
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perror("send_message: msgget");
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return -1;
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}
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retval = msgsnd(mq_id, msg, msg_size, (wait?0:IPC_NOWAIT));
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if (retval < 0) {
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perror("send_message: msgsnd");
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return -1;
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}
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return 0;
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}
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int destroy_message_queue(key_t key) {
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int mq_id, retval;
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mq_id = msgget(key, 0666);
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if (mq_id < 0) {
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perror("delete_message_queue: msgget");
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return -1;
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}
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retval = msgctl(mq_id, IPC_RMID, NULL);
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if (retval) {
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perror("delete_message_queue: msgctl");
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return -1;
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}
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return 0;
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}
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const char *BOINC_RCSID_7b5e8a534b = "$Id$";
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