/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
*
- * 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, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file ipc.c interprocess communication and shared memory helpers */
#include <sys/shm.h>
#include <sys/sem.h>
-/** abort if semget() failed that many times */
-#define MAX_SEMOP_RETRIES 500
-
/**
* define a new mutex
*
return ret < 0? -E_SEM_REMOVE : 1;
}
-static void para_semop(int id, struct sembuf *sops, unsigned num)
+static void para_semop(int id, struct sembuf *sops, int num)
{
- int i;
-
- for (i = 0; i < MAX_SEMOP_RETRIES; i++)
+ do {
if (semop(id, sops, num) >= 0)
return;
- PARA_EMERG_LOG("semop failed %d times, aborting\n", MAX_SEMOP_RETRIES);
+ } while (errno == EINTR);
+ if (errno == EIDRM) {
+ PARA_NOTICE_LOG("semaphore set %d was removed\n", id);
+ return;
+ }
+ PARA_EMERG_LOG("fatal semop error %s: pid %d\n", strerror(errno),
+ (int)getpid());
exit(EXIT_FAILURE);
}