1 /* 2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef OS_CPU_LINUX_SPARC_VM_ORDERACCESS_LINUX_SPARC_HPP 26 #define OS_CPU_LINUX_SPARC_VM_ORDERACCESS_LINUX_SPARC_HPP 27 28 #include "runtime/orderAccess.hpp" 29 30 // Implementation of class OrderAccess. 31 32 // A compiler barrier, forcing the C++ compiler to invalidate all memory assumptions 33 static inline void compiler_barrier() { 34 __asm__ volatile ("" : : : "memory"); 35 } 36 37 // Assume TSO. 38 39 inline void OrderAccess::loadload() { compiler_barrier(); } 40 inline void OrderAccess::storestore() { compiler_barrier(); } 41 inline void OrderAccess::loadstore() { compiler_barrier(); } 42 inline void OrderAccess::storeload() { fence(); } 43 44 inline void OrderAccess::acquire() { compiler_barrier(); } 45 inline void OrderAccess::release() { compiler_barrier(); } 46 47 inline void OrderAccess::fence() { 48 __asm__ volatile ("membar #StoreLoad" : : : "memory"); 49 } 50 51 #endif // OS_CPU_LINUX_SPARC_VM_ORDERACCESS_LINUX_SPARC_HPP