hcq/MaxScale
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Added back read and write mutex to dcb. Locks are acquired in poll.c before calling call-back functions. Additional locks efficiently hide memory corruption issue, which appears when readconn router is used without using those mutexes, with multiple parallel maxscale threads and intensive load.

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vraatikka
2013-11-20 17:23:04 +02:00
parent 35d34862b9
commit a30e2ab29b
3 changed files with 39 additions and 1 deletions
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6
server/core/dcb.c
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@ -106,6 +106,12 @@ if ((rval = calloc(1, sizeof(DCB))) == NULL)
rval->dcb_chk_tail = CHK_NUM_DCB;
#endif
rval->dcb_role = role;
#if 1
simple_mutex_init(&rval->dcb_write_lock, "DCB write mutex");
simple_mutex_init(&rval->dcb_read_lock, "DCB read mutex");
rval->dcb_write_active = false;
rval->dcb_read_active = false;
#endif
spinlock_init(&rval->dcb_initlock);
spinlock_init(&rval->writeqlock);
spinlock_init(&rval->delayqlock);