contrib/libs/cxxsupp/builtins/atomic_flag_test_and_set.c


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/*===-- atomic_flag_test_and_set.c ------------------------------------------=== 
 * 
 *                     The LLVM Compiler Infrastructure 
 * 
 * This file is dual licensed under the MIT and the University of Illinois Open 
 * Source Licenses. See LICENSE.TXT for details. 
 * 
 *===------------------------------------------------------------------------=== 
 * 
 * This file implements atomic_flag_test_and_set from C11's stdatomic.h. 
 * 
 *===------------------------------------------------------------------------=== 
 */ 
 
#ifndef __has_include 
#define __has_include(inc) 0 
#endif 
 
#if __has_include(<stdatomic.h>) 
 
#include <stdatomic.h> 
#undef atomic_flag_test_and_set 
_Bool atomic_flag_test_and_set(volatile atomic_flag *object) { 
  return __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST); 
} 
 
#endif