1 /*
2 * Copyright (c) 1999, 2011, 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_INLINE_HPP
27 #define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP
28
29 #include "runtime/atomic.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_aarch64.hpp"
32
33 // Implementation of class atomic
34
35 #define FULL_MEM_BARRIER __sync_synchronize()
36 #define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE);
37 #define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
38
39 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
40 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
41 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
42 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
43 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
44
45 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
46 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
47 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
48 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
49 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
50
51
52 inline jint Atomic::add(jint add_value, volatile jint* dest)
53 {
54 return __sync_add_and_fetch(dest, add_value);
55 }
56
57 inline void Atomic::inc(volatile jint* dest)
58 {
59 add(1, dest);
60 }
61
62 inline void Atomic::inc_ptr(volatile void* dest)
63 {
64 add_ptr(1, dest);
65 }
66
67 inline void Atomic::dec (volatile jint* dest)
68 {
69 add(-1, dest);
70 }
71
72 inline void Atomic::dec_ptr(volatile void* dest)
73 {
74 add_ptr(-1, dest);
75 }
76
77 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest)
78 {
79 jint res = __sync_lock_test_and_set (dest, exchange_value);
80 FULL_MEM_BARRIER;
81 return res;
82 }
83
84 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest)
85 {
86 return (void *) xchg_ptr((intptr_t) exchange_value,
87 (volatile intptr_t*) dest);
88 }
89
90
91 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value)
92 {
93 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
94 }
95
96 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
97 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
98
99 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
100 {
101 return __sync_add_and_fetch(dest, add_value);
102 }
103
104 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest)
105 {
106 return (void *) add_ptr(add_value, (volatile intptr_t *) dest);
107 }
108
109 inline void Atomic::inc_ptr(volatile intptr_t* dest)
110 {
111 add_ptr(1, dest);
112 }
113
114 inline void Atomic::dec_ptr(volatile intptr_t* dest)
115 {
116 add_ptr(-1, dest);
117 }
118
119 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
120 {
121 intptr_t res = __sync_lock_test_and_set (dest, exchange_value);
122 FULL_MEM_BARRIER;
123 return res;
124 }
125
126 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value)
127 {
128 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
129 }
130
131 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value)
132 {
133 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
134 }
135
136 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value)
137 {
138 return (void *) cmpxchg_ptr((intptr_t) exchange_value,
139 (volatile intptr_t*) dest,
140 (intptr_t) compare_value);
141 }
142
143 inline jlong Atomic::load(volatile jlong* src) { return *src; }
144
145 #endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_INLINE_HPP