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annotate src/os_cpu/linux_zero/vm/orderAccess_linux_zero.inline.hpp @ 18710:4836c2abc884
mx: removed hard-coded -Xms setting for the 'build' and 'checkstyle' commands to try and avoid unnecessary swapping on low(er) memory machines
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 18 Dec 2014 12:12:04 +1000 |
parents | f95d63e2154a |
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1010 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
1010 | 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 * | |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
1010 | 23 * |
24 */ | |
25 | |
1972 | 26 #ifndef OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP |
27 #define OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP | |
28 | |
29 #include "runtime/orderAccess.hpp" | |
30 #include "vm_version_zero.hpp" | |
31 | |
1010 | 32 #ifdef ARM |
33 | |
34 /* | |
35 * ARM Kernel helper for memory barrier. | |
36 * Using __asm __volatile ("":::"memory") does not work reliable on ARM | |
37 * and gcc __sync_synchronize(); implementation does not use the kernel | |
38 * helper for all gcc versions so it is unreliable to use as well. | |
39 */ | |
40 typedef void (__kernel_dmb_t) (void); | |
41 #define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0) | |
42 | |
43 #define FULL_MEM_BARRIER __kernel_dmb() | |
44 #define READ_MEM_BARRIER __kernel_dmb() | |
45 #define WRITE_MEM_BARRIER __kernel_dmb() | |
46 | |
47 #else // ARM | |
48 | |
49 #define FULL_MEM_BARRIER __sync_synchronize() | |
50 | |
51 #ifdef PPC | |
52 | |
53 #define READ_MEM_BARRIER __asm __volatile ("isync":::"memory") | |
54 #ifdef __NO_LWSYNC__ | |
55 #define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory") | |
56 #else | |
57 #define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory") | |
58 #endif | |
59 | |
60 #else // PPC | |
61 | |
62 #define READ_MEM_BARRIER __asm __volatile ("":::"memory") | |
63 #define WRITE_MEM_BARRIER __asm __volatile ("":::"memory") | |
64 | |
65 #endif // PPC | |
66 | |
67 #endif // ARM | |
68 | |
69 | |
70 inline void OrderAccess::loadload() { acquire(); } | |
71 inline void OrderAccess::storestore() { release(); } | |
72 inline void OrderAccess::loadstore() { acquire(); } | |
73 inline void OrderAccess::storeload() { fence(); } | |
74 | |
75 inline void OrderAccess::acquire() { | |
76 READ_MEM_BARRIER; | |
77 } | |
78 | |
79 inline void OrderAccess::release() { | |
80 WRITE_MEM_BARRIER; | |
81 } | |
82 | |
83 inline void OrderAccess::fence() { | |
84 FULL_MEM_BARRIER; | |
85 } | |
86 | |
87 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { jbyte data = *p; acquire(); return data; } | |
88 inline jshort OrderAccess::load_acquire(volatile jshort* p) { jshort data = *p; acquire(); return data; } | |
89 inline jint OrderAccess::load_acquire(volatile jint* p) { jint data = *p; acquire(); return data; } | |
90 inline jlong OrderAccess::load_acquire(volatile jlong* p) { | |
91 jlong tmp; | |
92 os::atomic_copy64(p, &tmp); | |
93 acquire(); | |
94 return tmp; | |
95 } | |
96 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { jubyte data = *p; acquire(); return data; } | |
97 inline jushort OrderAccess::load_acquire(volatile jushort* p) { jushort data = *p; acquire(); return data; } | |
98 inline juint OrderAccess::load_acquire(volatile juint* p) { juint data = *p; acquire(); return data; } | |
99 inline julong OrderAccess::load_acquire(volatile julong* p) { | |
100 julong tmp; | |
101 os::atomic_copy64(p, &tmp); | |
102 acquire(); | |
103 return tmp; | |
104 } | |
105 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { jfloat data = *p; acquire(); return data; } | |
106 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { | |
107 jdouble tmp; | |
108 os::atomic_copy64(p, &tmp); | |
109 acquire(); | |
110 return tmp; | |
111 } | |
112 | |
113 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { | |
114 intptr_t data = *p; | |
115 acquire(); | |
116 return data; | |
117 } | |
118 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { | |
119 void *data = *(void* volatile *)p; | |
120 acquire(); | |
121 return data; | |
122 } | |
123 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { | |
124 void *data = *(void* const volatile *)p; | |
125 acquire(); | |
126 return data; | |
127 } | |
128 | |
129 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { release(); *p = v; } | |
130 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { release(); *p = v; } | |
131 inline void OrderAccess::release_store(volatile jint* p, jint v) { release(); *p = v; } | |
132 inline void OrderAccess::release_store(volatile jlong* p, jlong v) | |
133 { release(); os::atomic_copy64(&v, p); } | |
134 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { release(); *p = v; } | |
135 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; } | |
136 inline void OrderAccess::release_store(volatile juint* p, juint v) { release(); *p = v; } | |
137 inline void OrderAccess::release_store(volatile julong* p, julong v) | |
138 { release(); os::atomic_copy64(&v, p); } | |
139 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { release(); *p = v; } | |
140 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) | |
141 { release(); os::atomic_copy64(&v, p); } | |
142 | |
143 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; } | |
144 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) | |
145 { release(); *(void* volatile *)p = v; } | |
146 | |
147 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); } | |
148 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); } | |
149 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); } | |
150 inline void OrderAccess::store_fence(jlong* p, jlong v) { os::atomic_copy64(&v, p); fence(); } | |
151 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); } | |
152 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); } | |
153 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); } | |
154 inline void OrderAccess::store_fence(julong* p, julong v) { os::atomic_copy64(&v, p); fence(); } | |
155 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } | |
156 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); } | |
157 | |
158 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); } | |
159 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); } | |
160 | |
161 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { release_store(p, v); fence(); } | |
162 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { release_store(p, v); fence(); } | |
163 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { release_store(p, v); fence(); } | |
164 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); } | |
165 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store(p, v); fence(); } | |
166 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); } | |
167 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store(p, v); fence(); } | |
168 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store(p, v); fence(); } | |
169 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { release_store(p, v); fence(); } | |
170 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); } | |
171 | |
172 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); } | |
173 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { release_store_ptr(p, v); fence(); } | |
1972 | 174 |
175 #endif // OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP |