orderAccess_solaris_x86.inline.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2003, 2009, 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// Implementation of class OrderAccess. 26 27// For Sun Studio - implementation is in solaris_i486.il. 28// For gcc - implementation is just below. 29extern "C" void _OrderAccess_acquire(); 30extern "C" void _OrderAccess_fence(); 31 32inline void OrderAccess::loadload() { acquire(); } 33inline void OrderAccess::storestore() { release(); } 34inline void OrderAccess::loadstore() { acquire(); } 35inline void OrderAccess::storeload() { fence(); } 36 37inline void OrderAccess::acquire() { 38 _OrderAccess_acquire(); 39 40} 41 42inline void OrderAccess::release() { 43 dummy = 0; 44} 45 46inline void OrderAccess::fence() { 47 if (os::is_MP()) { 48 _OrderAccess_fence(); 49 } 50} 51 52#ifdef _GNU_SOURCE 53 54extern "C" { 55 inline void _OrderAccess_acquire() { 56 volatile intptr_t dummy; 57#ifdef AMD64 58 __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (dummy) : : "memory"); 59#else 60 __asm__ volatile ("movl 0(%%esp),%0" : "=r" (dummy) : : "memory"); 61#endif // AMD64 62 } 63 inline void _OrderAccess_fence() { 64 // Always use locked addl since mfence is sometimes expensive 65 __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory"); 66 } 67 68} 69 70#endif // GNU_SOURCE 71 72inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; } 73inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; } 74inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; } 75inline jlong OrderAccess::load_acquire(volatile jlong* p) { return *p; } 76inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; } 77inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; } 78inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; } 79inline julong OrderAccess::load_acquire(volatile julong* p) { return *p; } 80inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; } 81inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; } 82 83inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; } 84inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; } 85inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; } 86 87inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; } 88inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; } 89inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; } 90inline void OrderAccess::release_store(volatile jlong* p, jlong v) { *p = v; } 91inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; } 92inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; } 93inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; } 94inline void OrderAccess::release_store(volatile julong* p, julong v) { *p = v; } 95inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; } 96inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; } 97 98inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; } 99inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; } 100 101inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); } 102inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); } 103inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); } 104inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); } 105inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); } 106inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); } 107inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); } 108inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; fence(); } 109inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } 110inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); } 111 112inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); } 113inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); } 114 115inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { *p = v; fence(); } 116inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { *p = v; fence(); } 117inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { *p = v; fence(); } 118inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { *p = v; fence(); } 119inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { *p = v; fence(); } 120inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); } 121inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { *p = v; fence(); } 122inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { *p = v; fence(); } 123inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); } 124inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); } 125 126inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); } 127inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { *(void* volatile *)p = v; fence(); } 128