1 files changed, 55 insertions, 0 deletions

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 <linux/types.h>
+
+#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