1 /*
   2  * Copyright (c) 1999, 2011, 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_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP
  26 #define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP
  27 
  28 #include "runtime/atomic.hpp"
  29 #include "runtime/os.hpp"
  30 #include "vm_version_aarch64.hpp"
  31 
  32 // Implementation of class atomic
  33 
  34 #define FULL_MEM_BARRIER  __sync_synchronize()
  35 #define READ_MEM_BARRIER  __atomic_thread_fence(__ATOMIC_ACQUIRE);
  36 #define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
  37 
  38 inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
  39 inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
  40 inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
  41 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
  42 inline void Atomic::store_ptr(void*    store_value, void*     dest) { *(void**)dest = store_value; }
  43 
  44 inline void Atomic::store    (jbyte    store_value, volatile jbyte*    dest) { *dest = store_value; }
  45 inline void Atomic::store    (jshort   store_value, volatile jshort*   dest) { *dest = store_value; }
  46 inline void Atomic::store    (jint     store_value, volatile jint*     dest) { *dest = store_value; }
  47 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
  48 inline void Atomic::store_ptr(void*    store_value, volatile void*     dest) { *(void* volatile *)dest = store_value; }
  49 
  50 
  51 inline jint Atomic::add(jint add_value, volatile jint* dest)
  52 {
  53  return __sync_add_and_fetch(dest, add_value);
  54 }
  55 
  56 inline void Atomic::inc(volatile jint* dest)
  57 {
  58  add(1, dest);
  59 }
  60 
  61 inline void Atomic::inc_ptr(volatile void* dest)
  62 {
  63  add_ptr(1, dest);
  64 }
  65 
  66 inline void Atomic::dec (volatile jint* dest)
  67 {
  68  add(-1, dest);
  69 }
  70 
  71 inline void Atomic::dec_ptr(volatile void* dest)
  72 {
  73  add_ptr(-1, dest);
  74 }
  75 
  76 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest)
  77 {
  78   jint res = __sync_lock_test_and_set (dest, exchange_value);
  79   FULL_MEM_BARRIER;
  80   return res;
  81 }
  82 
  83 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest)
  84 {
  85   return (void *) xchg_ptr((intptr_t) exchange_value,
  86                            (volatile intptr_t*) dest);
  87 }
  88 
  89 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value)
  90 {
  91  return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
  92 }
  93 
  94 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
  95 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
  96 
  97 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
  98 {
  99  return __sync_add_and_fetch(dest, add_value);
 100 }
 101 
 102 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest)
 103 {
 104   return (void *) add_ptr(add_value, (volatile intptr_t *) dest);
 105 }
 106 
 107 inline void Atomic::inc_ptr(volatile intptr_t* dest)
 108 {
 109  add_ptr(1, dest);
 110 }
 111 
 112 inline void Atomic::dec_ptr(volatile intptr_t* dest)
 113 {
 114  add_ptr(-1, dest);
 115 }
 116 
 117 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
 118 {
 119   intptr_t res = __sync_lock_test_and_set (dest, exchange_value);
 120   FULL_MEM_BARRIER;
 121   return res;
 122 }
 123 
 124 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value)
 125 {
 126  return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
 127 }
 128 
 129 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value)
 130 {
 131  return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
 132 }
 133 
 134 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value)
 135 {
 136   return (void *) cmpxchg_ptr((intptr_t) exchange_value,
 137                               (volatile intptr_t*) dest,
 138                               (intptr_t) compare_value);
 139 }
 140 
 141 inline jlong Atomic::load(volatile jlong* src) { return *src; }
 142 
 143 #endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP