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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <signal.h>
#include <stddef.h>
int main() {
/* Atomic builtins are supported by gcc 4.7.3 and later. */
sig_atomic_t atomic = 0, value = 1;
__atomic_store(&atomic, &value, __ATOMIC_RELAXED);
__atomic_load(&atomic, &value, __ATOMIC_RELAXED);
/* _Static_assert is supported for C99 by gcc 4.6 and later,
* so using it here shouldn't limit use of the atomic builtins. */
_Static_assert(__atomic_always_lock_free(sizeof(sig_atomic_t), NULL),
"Atomic operations in this environment would require locking");
return 0;
}
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