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avutil/atomic: reuse ret to avoid dereferencing twice the same value.

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This commit is contained in:
Clément Bœsch 2014-05-26 21:08:32 +02:00
parent cc91488588
commit 56e432b27b
1 changed files with 1 additions and 1 deletions
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2
libavutil/atomic.c
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@ -64,7 +64,7 @@ void *avpriv_atomic_ptr_cas(void * volatile *ptr, void *oldval, void *newval)
void *ret; void *ret;
pthread_mutex_lock(&atomic_lock); pthread_mutex_lock(&atomic_lock);
ret = *ptr; ret = *ptr;
if (*ptr == oldval) if (ret == oldval)
*ptr = newval; *ptr = newval;
pthread_mutex_unlock(&atomic_lock); pthread_mutex_unlock(&atomic_lock);
return ret; return ret;