diff options
| author | cheloha <cheloha@cvs.openbsd.org> | 2018-05-28 18:51:28 +0000 |
|---|---|---|
| committer | cheloha <cheloha@cvs.openbsd.org> | 2018-05-28 18:51:28 +0000 |
| commit | 44dea39c066a55a5fe6bd92446676da34e235f5d (patch) | |
| tree | 34d8431722615ded54e1fcc3ccdc00d24d34cf02 /sys/kern | |
| parent | e5fd359552a5926faf575c3645451d5df40e7efe (diff) | |
rwsleep: generalize to support both read- and write-locks.
Wanted for tentative clock_nanosleep(2) diff, but maybe useful
elsewhere in the future.
ok mpi@
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_synch.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c index 618e2e487c1..6d6dfcb630c 100644 --- a/sys/kern/kern_synch.c +++ b/sys/kern/kern_synch.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_synch.c,v 1.144 2018/04/24 16:28:42 pirofti Exp $ */ +/* $OpenBSD: kern_synch.c,v 1.145 2018/05/28 18:51:27 cheloha Exp $ */ /* $NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $ */ /* @@ -236,31 +236,32 @@ msleep(const volatile void *ident, struct mutex *mtx, int priority, * entered the sleep queue we drop the it. After sleeping we re-lock. */ int -rwsleep(const volatile void *ident, struct rwlock *wl, int priority, +rwsleep(const volatile void *ident, struct rwlock *rwl, int priority, const char *wmesg, int timo) { struct sleep_state sls; - int error, error1; + int error, error1, status; WITNESS_SAVE_DECL(lock_fl); KASSERT((priority & ~(PRIMASK | PCATCH | PNORELOCK)) == 0); - rw_assert_wrlock(wl); + rw_assert_anylock(rwl); + status = rw_status(rwl); sleep_setup(&sls, ident, priority, wmesg); sleep_setup_timeout(&sls, timo); sleep_setup_signal(&sls, priority); - WITNESS_SAVE(&wl->rwl_lock_obj, lock_fl); + WITNESS_SAVE(&rwl->rwl_lock_obj, lock_fl); - rw_exit_write(wl); + rw_exit(rwl); sleep_finish(&sls, 1); error1 = sleep_finish_timeout(&sls); error = sleep_finish_signal(&sls); if ((priority & PNORELOCK) == 0) { - rw_enter_write(wl); - WITNESS_RESTORE(&wl->rwl_lock_obj, lock_fl); + rw_enter(rwl, status); + WITNESS_RESTORE(&rwl->rwl_lock_obj, lock_fl); } /* Signal errors are higher priority than timeouts. */ |