1 /* 2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP 27 #define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP 28 29 #include "vm_version_aarch64.hpp" 30 31 // Implementation of class atomic 32 33 #define FULL_MEM_BARRIER __sync_synchronize() 34 #define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE); 35 #define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE); 36 37 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 38 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 39 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 40 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 41 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 42 43 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 44 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 45 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 46 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 47 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 48 49 50 template<size_t byte_size> 51 struct Atomic::PlatformAdd 52 : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> > 53 { 54 template<typename I, typename D> 55 D add_and_fetch(I add_value, D volatile* dest) const { 56 return __sync_add_and_fetch(dest, add_value); 57 } 58 }; 59 60 template<size_t byte_size> 61 template<typename T> 62 inline T Atomic::PlatformXchg<byte_size>::operator()(T exchange_value, 63 T volatile* dest) const { 64 STATIC_ASSERT(byte_size == sizeof(T)); 65 T res = __sync_lock_test_and_set(dest, exchange_value); 66 FULL_MEM_BARRIER; 67 return res; 68 } 69 70 template<size_t byte_size> 71 template<typename T> 72 inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value, 73 T volatile* dest, 74 T compare_value, 75 cmpxchg_memory_order order) const { 76 STATIC_ASSERT(byte_size == sizeof(T)); 77 if (order == memory_order_relaxed) { 78 T value = compare_value; 79 __atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false, 80 __ATOMIC_RELAXED, __ATOMIC_RELAXED); 81 return value; 82 } else { 83 return __sync_val_compare_and_swap(dest, compare_value, exchange_value); 84 } 85 } 86 87 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 88 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 89 90 inline jlong Atomic::load(const volatile jlong* src) { return *src; } 91 92 #endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP