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sna: Reorder writes during thread task decoupling

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So that the lockless reads do not see the task complete signal prior to
marking the task as successful. Otherwise, we falsely detect that the
thread trapped a signal and kill them all.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2014-02-28 08:47:21 +00:00
parent 37d080929a
commit a3bfb4d3c1
1 changed files with 2 additions and 2 deletions
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4
src/sna/sna_threads.c
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@@ -67,8 +67,8 @@ static void *__run__(void *arg)
t->func(t->arg);
pthread_mutex_lock(&t->mutex);
t->func = NULL;
t->arg = NULL;
t->func = NULL;
pthread_cond_signal(&t->cond);
}
pthread_mutex_unlock(&t->mutex);
@@ -190,8 +190,8 @@ void sna_threads_trap(int sig)
ERR(("%s: thread[%d] caught signal %d\n", __func__, n, sig));
pthread_mutex_lock(&threads[n].mutex);
threads[n].func = NULL;
threads[n].arg = (void *)(intptr_t)sig;
threads[n].func = NULL;
pthread_cond_signal(&threads[n].cond);
pthread_mutex_unlock(&threads[n].mutex);