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(parent: a84983d) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Sat, 17 Sep 2016 18:00:44 +0000 (18:00 +0000)
committerAurelien Jarno <aurel32@debian.org>
Sat, 17 Sep 2016 18:00:44 +0000 (18:00 +0000)
commitc725331275ca4c3282acec4dfafb906c5107f232
treee95d725643f432d4b1ba67921ee9b57dbdda5b23tree | snapshot
parenta84983daf2172c0c228b48b52f6eb45a0f6991bccommit | diff
Make F_RDLCK/F_WRLCK atomic

lockf(LOCK_EX) would for instance drop any existing shared lock before taking
the exclusive lock. F_RDLCK/F_WRLCK need atomic changes, so introduce and use
__LOCK_ATOM

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
* misc/sys/file.h (__LOCK_ATOMIC): New macro.
* sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Use __LOCK_ATOMIC along LOCK_SH and
LOCK_EX.

Gbp-Pq: Topic hurd-i386
Gbp-Pq: Name tg-WRLCK-upgrade.diff
misc/sys/file.h diff | blob | history
sysdeps/mach/hurd/fcntl.c diff | blob | history
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