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vcl: improve handling of thread cancelation in vls

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Meant for multi-threaded applications that share a vls and vcl worker.
Disable thread cancelation on thread new thread detection and add a new
pthread cancelation point in vls_mt_mq_lock

Type: improvement

Change-Id: I21b16ee7c6a5ec31b8f6363325cc7ffa463c7b5c
Signed-off-by: Florin Coras <fcoras@cisco.com>
This commit is contained in:
Florin Coras 2024-12-07 16:20:46 -05:00
parent b8af24b26d
commit 4e271dda7b
1 changed files with 7 additions and 0 deletions
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7
src/vcl/vcl_locked.c
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@ -301,11 +301,18 @@ vls_mt_add (void)
}
else
vcl_set_worker_index (vlsl->vls_wrk_index);
/* Only allow new pthread to be cancled in vls_mt_mq_lock */
int old_state;
if (vlsl->vls_mt_n_threads >= 2)
pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &old_state);
}
static inline void
vls_mt_mq_lock (void)
{
/* Allow controlled cancelation of thread before grabbing mutex */
pthread_testcancel ();
pthread_mutex_lock (&vlsl->vls_mt_mq_mlock);
}