1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef INCLUDE_PERFETTO_PUBLIC_ABI_ATOMIC_H_ 18 #define INCLUDE_PERFETTO_PUBLIC_ABI_ATOMIC_H_ 19 20 // Problem: C++11 and C11 use a different syntax for atomics and the C11 syntax 21 // is not supported in C++11. 22 // 23 // This header bridges the gap. 24 // 25 // This assumes that C++11 atomics are binary compatible with C11 atomics. While 26 // this is technically not required by the standards, reasonable compilers 27 // appear to guarantee this. 28 29 #ifdef __cplusplus 30 #include <atomic> 31 #else 32 #include <stdatomic.h> 33 #endif 34 35 #ifdef __cplusplus 36 #define PERFETTO_ATOMIC(TYPE) std::atomic<TYPE> 37 #else 38 #define PERFETTO_ATOMIC(TYPE) _Atomic(TYPE) 39 #endif 40 41 #ifdef __cplusplus 42 #define PERFETTO_ATOMIC_LOAD std::atomic_load 43 #define PERFETTO_ATOMIC_LOAD_EXPLICIT std::atomic_load_explicit 44 #define PERFETTO_ATOMIC_STORE std::atomic_store 45 #define PERFETTO_ATOMIC_STORE_EXPLICIT std::atomic_store_explicit 46 47 #define PERFETTO_MEMORY_ORDER_ACQ_REL std::memory_order_acq_rel 48 #define PERFETTO_MEMORY_ORDER_ACQUIRE std::memory_order_acquire 49 #define PERFETTO_MEMORY_ORDER_CONSUME std::memory_order_consume 50 #define PERFETTO_MEMORY_ORDER_RELAXED std::memory_order_relaxed 51 #define PERFETTO_MEMORY_ORDER_RELEASE std::memory_order_release 52 #define PERFETTO_MEMORY_ORDER_SEQ_CST std::memory_order_seq_cst 53 #else 54 #define PERFETTO_ATOMIC_LOAD atomic_load 55 #define PERFETTO_ATOMIC_LOAD_EXPLICIT atomic_load_explicit 56 #define PERFETTO_ATOMIC_STORE atomic_store 57 #define PERFETTO_ATOMIC_STORE_EXPLICIT atomic_store_explicit 58 59 #define PERFETTO_MEMORY_ORDER_ACQ_REL memory_order_acq_rel 60 #define PERFETTO_MEMORY_ORDER_ACQUIRE memory_order_acquire 61 #define PERFETTO_MEMORY_ORDER_CONSUME memory_order_consume 62 #define PERFETTO_MEMORY_ORDER_RELAXED memory_order_relaxed 63 #define PERFETTO_MEMORY_ORDER_RELEASE memory_order_release 64 #define PERFETTO_MEMORY_ORDER_SEQ_CST memory_order_seq_cst 65 #endif 66 67 #endif // INCLUDE_PERFETTO_PUBLIC_ABI_ATOMIC_H_ 68