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/*
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2014, Red Hat Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP
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#define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP
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#include "runtime/atomic.hpp"
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#include "runtime/os.hpp"
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#include "vm_version_aarch64.hpp"
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// Implementation of class atomic
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#define FULL_MEM_BARRIER __sync_synchronize()
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#define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE);
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#define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
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inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
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inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
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inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
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inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
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inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
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inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
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inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
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inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
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inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
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inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
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inline jint Atomic::add(jint add_value, volatile jint* dest)
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{
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return __sync_add_and_fetch(dest, add_value);
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}
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inline void Atomic::inc(volatile jint* dest)
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{
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add(1, dest);
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}
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inline void Atomic::inc_ptr(volatile void* dest)
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{
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add_ptr(1, dest);
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}
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inline void Atomic::dec (volatile jint* dest)
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{
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add(-1, dest);
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}
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inline void Atomic::dec_ptr(volatile void* dest)
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{
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add_ptr(-1, dest);
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}
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inline jint Atomic::xchg (jint exchange_value, volatile jint* dest)
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{
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jint res = __sync_lock_test_and_set (dest, exchange_value);
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FULL_MEM_BARRIER;
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return res;
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}
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inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest)
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{
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return (void *) xchg_ptr((intptr_t) exchange_value,
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(volatile intptr_t*) dest);
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}
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template <typename T> T generic_cmpxchg(T exchange_value, volatile T* dest,
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T compare_value, cmpxchg_memory_order order)
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{
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if (order == memory_order_relaxed) {
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T value = compare_value;
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__atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false,
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__ATOMIC_RELAXED, __ATOMIC_RELAXED);
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return value;
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} else {
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return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
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}
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}
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#define VM_HAS_SPECIALIZED_CMPXCHG_BYTE
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inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order)
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{
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return generic_cmpxchg(exchange_value, dest, compare_value, order);
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}
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inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order)
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{
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return generic_cmpxchg(exchange_value, dest, compare_value, order);
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}
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inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
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inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
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inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
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{
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return __sync_add_and_fetch(dest, add_value);
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}
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inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest)
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{
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return (void *) add_ptr(add_value, (volatile intptr_t *) dest);
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}
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inline void Atomic::inc_ptr(volatile intptr_t* dest)
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{
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add_ptr(1, dest);
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}
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inline void Atomic::dec_ptr(volatile intptr_t* dest)
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{
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add_ptr(-1, dest);
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}
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inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
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{
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intptr_t res = __sync_lock_test_and_set (dest, exchange_value);
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FULL_MEM_BARRIER;
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return res;
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}
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inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order)
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{
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return generic_cmpxchg(exchange_value, dest, compare_value, order);
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}
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inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order)
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{
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return generic_cmpxchg(exchange_value, dest, compare_value, order);
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}
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inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order)
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{
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return (void *) cmpxchg_ptr((intptr_t) exchange_value,
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(volatile intptr_t*) dest,
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(intptr_t) compare_value,
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order);
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}
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inline jlong Atomic::load(volatile jlong* src) { return *src; }
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#endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP