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Check for __GNUC__ to use GNU C atomic buildins

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Note: we trust any other compiler that fully implements GNU extension
to define __GNUC__

RT#4642

Reviewed-by: Andy Polyakov <appro@openssl.org>
This commit is contained in:
Richard Levitte 2016-08-24 13:03:20 +02:00 committed by Matt Caswell
parent 63db6b772f
commit cb4b54c23b
1 changed files with 3 additions and 3 deletions
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6
crypto/threads_pthread.c
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@ -109,9 +109,9 @@ int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
{
#ifdef __ATOMIC_RELAXED
# if defined(__GNUC__) && defined(__ATOMIC_RELAXED)
*ret = __atomic_add_fetch(val, amount, __ATOMIC_RELAXED);
#else
# else
if (!CRYPTO_THREAD_write_lock(lock))
return 0;
@ -120,7 +120,7 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
if (!CRYPTO_THREAD_unlock(lock))
return 0;
#endif
# endif
return 1;
}