1 /*===-- atomic_flag_test_and_set.c ------------------------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 *===------------------------------------------------------------------------=== 9 * 10 * This file implements atomic_flag_test_and_set from C11's stdatomic.h. 11 * 12 *===------------------------------------------------------------------------=== 13 */ 14 15 #ifndef __has_include 16 #define __has_include(inc) 0 17 #endif 18 19 #if __has_include(<stdatomic.h>) 20 21 #include <stdatomic.h> 22 #undef atomic_flag_test_and_set 23 _Bool atomic_flag_test_and_set(volatile atomic_flag *object) { 24 return __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST); 25 } 26 27 #endif 28
