orderAccess_linux_zero.inline.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008, 2009 Red Hat, Inc.
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#ifdef ARM
27
28/*
29 * ARM Kernel helper for memory barrier.
30 * Using __asm __volatile ("":::"memory") does not work reliable on ARM
31 * and gcc __sync_synchronize(); implementation does not use the kernel
32 * helper for all gcc versions so it is unreliable to use as well.
33 */
34typedef void (__kernel_dmb_t) (void);
35#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
36
37#define FULL_MEM_BARRIER __kernel_dmb()
38#define READ_MEM_BARRIER __kernel_dmb()
39#define WRITE_MEM_BARRIER __kernel_dmb()
40
41#else // ARM
42
43#define FULL_MEM_BARRIER __sync_synchronize()
44
45#ifdef PPC
46
47#define READ_MEM_BARRIER __asm __volatile ("isync":::"memory")
48#ifdef __NO_LWSYNC__
49#define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
50#else
51#define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
52#endif
53
54#else // PPC
55
56#define READ_MEM_BARRIER __asm __volatile ("":::"memory")
57#define WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
58
59#endif // PPC
60
61#endif // ARM
62
63
64inline void OrderAccess::loadload()   { acquire(); }
65inline void OrderAccess::storestore() { release(); }
66inline void OrderAccess::loadstore()  { acquire(); }
67inline void OrderAccess::storeload()  { fence(); }
68
69inline void OrderAccess::acquire() {
70  READ_MEM_BARRIER;
71}
72
73inline void OrderAccess::release() {
74  WRITE_MEM_BARRIER;
75}
76
77inline void OrderAccess::fence() {
78  FULL_MEM_BARRIER;
79}
80
81inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { jbyte data = *p; acquire(); return data; }
82inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { jshort data = *p; acquire(); return data; }
83inline jint     OrderAccess::load_acquire(volatile jint*    p) { jint data = *p; acquire(); return data; }
84inline jlong    OrderAccess::load_acquire(volatile jlong*   p) {
85  jlong tmp;
86  os::atomic_copy64(p, &tmp);
87  acquire();
88  return tmp;
89}
90inline jubyte    OrderAccess::load_acquire(volatile jubyte*   p) { jubyte data = *p; acquire(); return data; }
91inline jushort   OrderAccess::load_acquire(volatile jushort*  p) { jushort data = *p; acquire(); return data; }
92inline juint     OrderAccess::load_acquire(volatile juint*    p) { juint data = *p; acquire(); return data; }
93inline julong   OrderAccess::load_acquire(volatile julong*  p) {
94  julong tmp;
95  os::atomic_copy64(p, &tmp);
96  acquire();
97  return tmp;
98}
99inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { jfloat data = *p; acquire(); return data; }
100inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) {
101  jdouble tmp;
102  os::atomic_copy64(p, &tmp);
103  acquire();
104  return tmp;
105}
106
107inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) {
108  intptr_t data = *p;
109  acquire();
110  return data;
111}
112inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) {
113  void *data = *(void* volatile *)p;
114  acquire();
115  return data;
116}
117inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) {
118  void *data = *(void* const volatile *)p;
119  acquire();
120  return data;
121}
122
123inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { release(); *p = v; }
124inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { release(); *p = v; }
125inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { release(); *p = v; }
126inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v)
127{ release(); os::atomic_copy64(&v, p); }
128inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { release(); *p = v; }
129inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; }
130inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { release(); *p = v; }
131inline void     OrderAccess::release_store(volatile julong*  p, julong  v)
132{ release(); os::atomic_copy64(&v, p); }
133inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { release(); *p = v; }
134inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v)
135{ release(); os::atomic_copy64(&v, p); }
136
137inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; }
138inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v)
139{ release(); *(void* volatile *)p = v; }
140
141inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }
142inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }
143inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }
144inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { os::atomic_copy64(&v, p); fence(); }
145inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }
146inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
147inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }
148inline void     OrderAccess::store_fence(julong*  p, julong  v) { os::atomic_copy64(&v, p); fence(); }
149inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
150inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); }
151
152inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
153inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }
154
155inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { release_store(p, v); fence(); }
156inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { release_store(p, v); fence(); }
157inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { release_store(p, v); fence(); }
158inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { release_store(p, v); fence(); }
159inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { release_store(p, v); fence(); }
160inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); }
161inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { release_store(p, v); fence(); }
162inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }
163inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { release_store(p, v); fence(); }
164inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); }
165
166inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); }
167inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { release_store_ptr(p, v); fence(); }
168