1 /*
2 * Copyright (c) 1999, 2017, 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_HPP
27 #define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
28
29 #include "vm_version_aarch64.hpp"
30
31 // Implementation of class atomic
32
33 #define FULL_MEM_BARRIER __sync_synchronize()
34 #define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE);
35 #define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
36
37 template<size_t byte_size>
38 struct Atomic::PlatformAdd
39 : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
40 {
41 template<typename I, typename D>
42 D add_and_fetch(I add_value, D volatile* dest) const {
43 return __sync_add_and_fetch(dest, add_value);
44 }
45 };
46
47 template<size_t byte_size>
48 template<typename T>
49 inline T Atomic::PlatformXchg<byte_size>::operator()(T exchange_value,
50 T volatile* dest) const {
51 STATIC_ASSERT(byte_size == sizeof(T));
52 T res = __sync_lock_test_and_set(dest, exchange_value);
53 FULL_MEM_BARRIER;
54 return res;
55 }
56
57 template<size_t byte_size>
58 template<typename T>
59 inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value,
60 T volatile* dest,
61 T compare_value,
62 cmpxchg_memory_order order) const {
63 STATIC_ASSERT(byte_size == sizeof(T));
64 if (order == memory_order_relaxed) {
65 T value = compare_value;
66 __atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false,
67 __ATOMIC_RELAXED, __ATOMIC_RELAXED);
68 return value;
69 } else {
70 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
71 }
72 }
73
74 #endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
|
1 /*
2 * Copyright (c) 1999, 2018, 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_HPP
27 #define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
28
29 #include "vm_version_aarch64.hpp"
30
31 // Implementation of class atomic
32
33 #define FULL_MEM_BARRIER __sync_synchronize()
34 #define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE);
35 #define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
36
37 template<size_t byte_size>
38 struct Atomic::PlatformAdd
39 : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
40 {
41 template<typename I, typename D>
42 D add_and_fetch(I add_value, D volatile* dest, atomic_memory_order order) const {
43 return __sync_add_and_fetch(dest, add_value);
44 }
45 };
46
47 template<size_t byte_size>
48 template<typename T>
49 inline T Atomic::PlatformXchg<byte_size>::operator()(T exchange_value,
50 T volatile* dest,
51 atomic_memory_order order) const {
52 STATIC_ASSERT(byte_size == sizeof(T));
53 T res = __sync_lock_test_and_set(dest, exchange_value);
54 FULL_MEM_BARRIER;
55 return res;
56 }
57
58 template<size_t byte_size>
59 template<typename T>
60 inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value,
61 T volatile* dest,
62 T compare_value,
63 atomic_memory_order order) const {
64 STATIC_ASSERT(byte_size == sizeof(T));
65 if (order == memory_order_relaxed) {
66 T value = compare_value;
67 __atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false,
68 __ATOMIC_RELAXED, __ATOMIC_RELAXED);
69 return value;
70 } else {
71 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
72 }
73 }
74
75 #endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
|