1 /* Atomic operations. C-SKY version. 2 Copyright (C) 2018-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library. If not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef __CSKY_ATOMIC_H_ 20 #define __CSKY_ATOMIC_H_ 21 22 #define __HAVE_64B_ATOMICS 0 23 #define USE_ATOMIC_COMPILER_BUILTINS 1 24 #define ATOMIC_EXCHANGE_USES_CAS 1 25 26 #define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \ 27 (abort (), 0) 28 29 #define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \ 30 (abort (), 0) 31 32 #define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \ 33 ({ \ 34 typeof (*mem) __oldval = (oldval); \ 35 !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ 36 model, __ATOMIC_RELAXED); \ 37 }) 38 39 #define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \ 40 (abort (), 0) 41 42 #define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \ 43 (abort (), (__typeof (*mem)) 0) 44 45 #define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \ 46 (abort (), (__typeof (*mem)) 0) 47 48 #define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \ 49 ({ \ 50 typeof (*mem) __oldval = (oldval); \ 51 __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ 52 model, __ATOMIC_RELAXED); \ 53 __oldval; \ 54 }) 55 56 #define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \ 57 (abort (), (__typeof (*mem)) 0) 58 59 #define atomic_compare_and_exchange_bool_acq(mem, new, old) \ 60 __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \ 61 mem, new, old, __ATOMIC_ACQUIRE) 62 63 #define atomic_compare_and_exchange_val_acq(mem, new, old) \ 64 __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ 65 mem, new, old, __ATOMIC_ACQUIRE) 66 67 #endif /* atomic-machine.h */ 68