diff options
| author | Elizabeth Figura <zfigura@codeweavers.com> | 2024-12-13 22:34:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-01-08 15:18:11 +0300 |
| commit | a138179a59d47690b069fbded1be12f47648ef07 (patch) | |
| tree | 457c93acf9a1620988a88d01a6855831c0678a1a /include/uapi/linux/ntsync.h | |
| parent | e864071a630cfbbd55251e7b45461003f4f79877 (diff) | |
| download | linux-a138179a59d47690b069fbded1be12f47648ef07.tar.xz | |
ntsync: Introduce alertable waits.
NT waits can optionally be made "alertable". This is a special channel for
thread wakeup that is mildly similar to SIGIO. A thread has an internal single
bit of "alerted" state, and if a thread is alerted while an alertable wait, the
wait will return a special value, consume the "alerted" state, and will not
consume any of its objects.
Alerts are implemented using events; the user-space NT emulator is expected to
create an internal ntsync event for each thread and pass that event to wait
functions.
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20241213193511.457338-16-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/linux/ntsync.h')
| -rw-r--r-- | include/uapi/linux/ntsync.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index b9d208a8c00f..6d06793512b1 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -34,7 +34,8 @@ struct ntsync_wait_args { __u32 index; __u32 flags; __u32 owner; - __u32 pad[2]; + __u32 alert; + __u32 pad; }; #define NTSYNC_MAX_WAIT_COUNT 64 |