tree fb80dc46a5695efd3b077bd84591a1cf69a1a98b
parent 9d58c9b2517dff5c44f5d5d54d0ceaa0dd119db9
author Willy Tarreau <w@1wt.eu> 1602953327 +0200
committer Willy Tarreau <w@1wt.eu> 1602953501 +0200
encoding latin1

MINOR: backend: replace the lbprm lock with an rwlock

It was previously a spinlock, and it happens that a number of LB algos
only lock it for lookups, without performing any modification. Let's
first turn it to an rwlock and w-lock it everywhere. This is strictly
identical.

It was carefully checked that every HA_SPIN_LOCK() was turned to
HA_RWLOCK_WRLOCK() and that HA_SPIN_UNLOCK() was turned to
HA_RWLOCK_WRUNLOCK() on this lock. _INIT and _DESTROY were updated too.