1 /** 2 * Copyright (c) 2021-2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef PANDA_RUNTIME_ARCH_MEMORY_HELPERS_H_ 16 #define PANDA_RUNTIME_ARCH_MEMORY_HELPERS_H_ 17 18 #if defined(PANDA_TARGET_ARM64) 19 #include "aarch64/memory.h" 20 #elif defined(PANDA_TARGET_ARM32) 21 #include "arm/memory.h" 22 #elif defined(PANDA_TARGET_X86) 23 #include "x86/memory.h" 24 #elif defined(PANDA_TARGET_AMD64) 25 #include "amd64/memory.h" 26 #else 27 #error "Unsupported target" 28 #endif 29 30 #include "libpandabase/macros.h" 31 32 namespace ark::arch { 33 34 // Forces system-wide full memory synchronization 35 // NB! It is assumed all panda targets provide such synchronization, which might not be true on all CPU architectures 36 // Architecture-agnostic C++ memory order provides no reordering guarantees in case just one thread contains memory 37 // fence while FullMemoryBarrier callers expect all previous reads and writes to be visible in all threads FullMemoryBarrier()38inline void FullMemoryBarrier() 39 { 40 arch_specific::FullMemoryBarrier(); 41 } 42 43 // Actually only full memory barrier guarantees StoreLoad order but separate implementation is used because of #16489 StoreLoadBarrier()44ALWAYS_INLINE inline void StoreLoadBarrier() 45 { 46 __sync_synchronize(); 47 } 48 49 } // namespace ark::arch 50 51 #endif // PANDA_RUNTIME_ARCH_HELPERS_H_ 52