From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/mqueue.h | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 include/linux/mqueue.h (limited to 'include/linux/mqueue.h') diff --git a/include/linux/mqueue.h b/include/linux/mqueue.h new file mode 100644 index 000000000000..8db9d75541a6 --- /dev/null +++ b/include/linux/mqueue.h @@ -0,0 +1,55 @@ +/* Copyright (C) 2003 Krzysztof Benedyczak & Michal Wronski + + This program 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. + + It 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. + + You should have received a copy of the GNU Lesser General Public + License along with this software; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _LINUX_MQUEUE_H +#define _LINUX_MQUEUE_H + +#include + +#define MQ_PRIO_MAX 32768 +/* per-uid limit of kernel memory used by mqueue, in bytes */ +#define MQ_BYTES_MAX 819200 + +struct mq_attr { + long mq_flags; /* message queue flags */ + long mq_maxmsg; /* maximum number of messages */ + long mq_msgsize; /* maximum message size */ + long mq_curmsgs; /* number of messages currently queued */ + long __reserved[4]; /* ignored for input, zeroed for output */ +}; + +/* + * SIGEV_THREAD implementation: + * SIGEV_THREAD must be implemented in user space. If SIGEV_THREAD is passed + * to mq_notify, then + * - sigev_signo must be the file descriptor of an AF_NETLINK socket. It's not + * necessary that the socket is bound. + * - sigev_value.sival_ptr must point to a cookie that is NOTIFY_COOKIE_LEN + * bytes long. + * If the notification is triggered, then the cookie is sent to the netlink + * socket. The last byte of the cookie is replaced with the NOTIFY_?? codes: + * NOTIFY_WOKENUP if the notification got triggered, NOTIFY_REMOVED if it was + * removed, either due to a close() on the message queue fd or due to a + * mq_notify() that removed the notification. + */ +#define NOTIFY_NONE 0 +#define NOTIFY_WOKENUP 1 +#define NOTIFY_REMOVED 2 + +#define NOTIFY_COOKIE_LEN 32 + +#endif -- cgit v1.2.3