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Add sx_unlock() macro as a frontend to both sx_sunlock() and sx_xunlock(),

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using sx_cnt to determine what state the lock is in and call the respective
function appropriately.
This commit is contained in:
Darren Reed 2004-07-11 16:07:07 +00:00
parent fa5afa1df0
commit 99e89d6725
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131984
1 changed files with 7 additions and 0 deletions
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7
sys/sys/sx.h
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@ -82,6 +82,13 @@ struct sx_args {
#define sx_xunlock(sx) _sx_xunlock((sx), LOCK_FILE, LOCK_LINE)
#define sx_try_upgrade(sx) _sx_try_upgrade((sx), LOCK_FILE, LOCK_LINE)
#define sx_downgrade(sx) _sx_downgrade((sx), LOCK_FILE, LOCK_LINE)
#define sx_unlock(sx) \
do { \
if ((sx)->sx_cnt < 0) \
sx_xunlock(sx); \
else \
sx_sunlock(sx); \
} while (0)
#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT)
#define SX_LOCKED LA_LOCKED