1 /*
2 * Copyright (c) 2003, 2010, 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 // Assume TSO.
28
29 // In solaris_sparc.il
30 extern "C" void _OrderAccess_acquire();
31 extern "C" void _OrderAccess_fence();
32
33 inline void OrderAccess::loadload() { acquire(); }
34 inline void OrderAccess::storestore() { release(); }
35 inline void OrderAccess::loadstore() { acquire(); }
36 inline void OrderAccess::storeload() { fence(); }
37
38 #ifdef _GNU_SOURCE
39
40 inline void OrderAccess::acquire() {
41 __asm__ volatile ("nop" : : :);
42 }
43
44 inline void OrderAccess::release() {
45 jint* local_dummy = (jint*)&local_dummy;
46 __asm__ volatile("stw %%g0, [%0]" : : "r" (local_dummy) : "memory");
47 }
48
49 inline void OrderAccess::fence() {
50 __asm__ volatile ("membar #StoreLoad" : : :);
51 }
52
53 #else // _GNU_SOURCE
54
55 inline void OrderAccess::acquire() {
56 _OrderAccess_acquire();
57 }
58
59 inline void OrderAccess::release() {
60 // Avoid hitting the same cache-line from
61 // different threads.
62 volatile jint local_dummy = 0;
63 }
64
65 inline void OrderAccess::fence() {
66 _OrderAccess_fence();
67 }
68
69 #endif // _GNU_SOURCE
70
71 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; }
72 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; }
73 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; }
74 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return *p; }
75 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; }
76 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; }
77 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; }
78 inline julong OrderAccess::load_acquire(volatile julong* p) { return *p; }
79 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; }
80 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
81
82 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; }
83 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; }
84 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
85
86 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; }
87 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; }
88 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; }
89 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { *p = v; }
90 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; }
91 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
92 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; }
93 inline void OrderAccess::release_store(volatile julong* p, julong v) { *p = v; }
94 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; }
95 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
96
97 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
98 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; }
99
100 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); }
101 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); }
102 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); }
103 inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); }
104 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); }
105 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
106 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); }
107 inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; fence(); }
108 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); }
109 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
110
111 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
112 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); }
113
114 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { *p = v; fence(); }
115 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { *p = v; fence(); }
116 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { *p = v; fence(); }
117 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { *p = v; fence(); }
118 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { *p = v; fence(); }
119 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
120 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { *p = v; fence(); }
121 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { *p = v; fence(); }
122 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); }
123 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
124
125 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
126 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { *(void* volatile *)p = v; fence(); }