diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/mqueue.h |
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!
Diffstat (limited to 'include/linux/mqueue.h')
-rw-r--r-- | include/linux/mqueue.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/linux/mqueue.h b/include/linux/mqueue.h new file mode 100644 index 00000000000..8db9d75541a --- /dev/null +++ b/include/linux/mqueue.h | |||
@@ -0,0 +1,55 @@ | |||
1 | /* Copyright (C) 2003 Krzysztof Benedyczak & Michal Wronski | ||
2 | |||
3 | This program is free software; you can redistribute it and/or | ||
4 | modify it under the terms of the GNU Lesser General Public | ||
5 | License as published by the Free Software Foundation; either | ||
6 | version 2.1 of the License, or (at your option) any later version. | ||
7 | |||
8 | It is distributed in the hope that it will be useful, | ||
9 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
11 | Lesser General Public License for more details. | ||
12 | |||
13 | You should have received a copy of the GNU Lesser General Public | ||
14 | License along with this software; if not, write to the Free | ||
15 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
16 | 02111-1307 USA. */ | ||
17 | |||
18 | #ifndef _LINUX_MQUEUE_H | ||
19 | #define _LINUX_MQUEUE_H | ||
20 | |||
21 | #include <linux/types.h> | ||
22 | |||
23 | #define MQ_PRIO_MAX 32768 | ||
24 | /* per-uid limit of kernel memory used by mqueue, in bytes */ | ||
25 | #define MQ_BYTES_MAX 819200 | ||
26 | |||
27 | struct mq_attr { | ||
28 | long mq_flags; /* message queue flags */ | ||
29 | long mq_maxmsg; /* maximum number of messages */ | ||
30 | long mq_msgsize; /* maximum message size */ | ||
31 | long mq_curmsgs; /* number of messages currently queued */ | ||
32 | long __reserved[4]; /* ignored for input, zeroed for output */ | ||
33 | }; | ||
34 | |||
35 | /* | ||
36 | * SIGEV_THREAD implementation: | ||
37 | * SIGEV_THREAD must be implemented in user space. If SIGEV_THREAD is passed | ||
38 | * to mq_notify, then | ||
39 | * - sigev_signo must be the file descriptor of an AF_NETLINK socket. It's not | ||
40 | * necessary that the socket is bound. | ||
41 | * - sigev_value.sival_ptr must point to a cookie that is NOTIFY_COOKIE_LEN | ||
42 | * bytes long. | ||
43 | * If the notification is triggered, then the cookie is sent to the netlink | ||
44 | * socket. The last byte of the cookie is replaced with the NOTIFY_?? codes: | ||
45 | * NOTIFY_WOKENUP if the notification got triggered, NOTIFY_REMOVED if it was | ||
46 | * removed, either due to a close() on the message queue fd or due to a | ||
47 | * mq_notify() that removed the notification. | ||
48 | */ | ||
49 | #define NOTIFY_NONE 0 | ||
50 | #define NOTIFY_WOKENUP 1 | ||
51 | #define NOTIFY_REMOVED 2 | ||
52 | |||
53 | #define NOTIFY_COOKIE_LEN 32 | ||
54 | |||
55 | #endif | ||