Mercurial > hg > truffle
annotate src/os_cpu/linux_zero/vm/atomic_linux_zero.inline.hpp @ 16425:8eec87d7bfc4
made Factory.newClassLoader() private
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 08 Jul 2014 21:23:22 +0200 |
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8008959: Fix non-PCH build on Linux, Windows and MacOS X
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright 2007, 2008, 2011 Red Hat, Inc. |
1010 | 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_ATOMIC_LINUX_ZERO_INLINE_HPP |
27 #define OS_CPU_LINUX_ZERO_VM_ATOMIC_LINUX_ZERO_INLINE_HPP | |
28 | |
29 #include "runtime/atomic.hpp" | |
30 #include "runtime/os.hpp" | |
31 #include "vm_version_zero.hpp" | |
32 | |
1010 | 33 // Implementation of class atomic |
34 | |
35 #ifdef M68K | |
36 | |
37 /* | |
38 * __m68k_cmpxchg | |
39 * | |
40 * Atomically store newval in *ptr if *ptr is equal to oldval for user space. | |
41 * Returns newval on success and oldval if no exchange happened. | |
42 * This implementation is processor specific and works on | |
43 * 68020 68030 68040 and 68060. | |
44 * | |
45 * It will not work on ColdFire, 68000 and 68010 since they lack the CAS | |
46 * instruction. | |
47 * Using a kernelhelper would be better for arch complete implementation. | |
48 * | |
49 */ | |
50 | |
51 static inline int __m68k_cmpxchg(int oldval, int newval, volatile int *ptr) { | |
52 int ret; | |
53 __asm __volatile ("cas%.l %0,%2,%1" | |
54 : "=d" (ret), "+m" (*(ptr)) | |
55 : "d" (newval), "0" (oldval)); | |
56 return ret; | |
57 } | |
58 | |
59 /* Perform an atomic compare and swap: if the current value of `*PTR' | |
60 is OLDVAL, then write NEWVAL into `*PTR'. Return the contents of | |
61 `*PTR' before the operation.*/ | |
62 static inline int m68k_compare_and_swap(volatile int *ptr, | |
63 int oldval, | |
64 int newval) { | |
65 for (;;) { | |
66 int prev = *ptr; | |
67 if (prev != oldval) | |
68 return prev; | |
69 | |
70 if (__m68k_cmpxchg (prev, newval, ptr) == newval) | |
71 // Success. | |
72 return prev; | |
73 | |
74 // We failed even though prev == oldval. Try again. | |
75 } | |
76 } | |
77 | |
78 /* Atomically add an int to memory. */ | |
79 static inline int m68k_add_and_fetch(volatile int *ptr, int add_value) { | |
80 for (;;) { | |
81 // Loop until success. | |
82 | |
83 int prev = *ptr; | |
84 | |
85 if (__m68k_cmpxchg (prev, prev + add_value, ptr) == prev + add_value) | |
86 return prev + add_value; | |
87 } | |
88 } | |
89 | |
90 /* Atomically write VALUE into `*PTR' and returns the previous | |
91 contents of `*PTR'. */ | |
92 static inline int m68k_lock_test_and_set(volatile int *ptr, int newval) { | |
93 for (;;) { | |
94 // Loop until success. | |
95 int prev = *ptr; | |
96 | |
97 if (__m68k_cmpxchg (prev, newval, ptr) == prev) | |
98 return prev; | |
99 } | |
100 } | |
101 #endif // M68K | |
102 | |
103 #ifdef ARM | |
104 | |
105 /* | |
106 * __kernel_cmpxchg | |
107 * | |
108 * Atomically store newval in *ptr if *ptr is equal to oldval for user space. | |
109 * Return zero if *ptr was changed or non-zero if no exchange happened. | |
110 * The C flag is also set if *ptr was changed to allow for assembly | |
111 * optimization in the calling code. | |
112 * | |
113 */ | |
114 | |
115 typedef int (__kernel_cmpxchg_t)(int oldval, int newval, volatile int *ptr); | |
116 #define __kernel_cmpxchg (*(__kernel_cmpxchg_t *) 0xffff0fc0) | |
117 | |
118 | |
119 | |
120 /* Perform an atomic compare and swap: if the current value of `*PTR' | |
121 is OLDVAL, then write NEWVAL into `*PTR'. Return the contents of | |
122 `*PTR' before the operation.*/ | |
123 static inline int arm_compare_and_swap(volatile int *ptr, | |
124 int oldval, | |
125 int newval) { | |
126 for (;;) { | |
127 int prev = *ptr; | |
128 if (prev != oldval) | |
129 return prev; | |
130 | |
131 if (__kernel_cmpxchg (prev, newval, ptr) == 0) | |
132 // Success. | |
133 return prev; | |
134 | |
135 // We failed even though prev == oldval. Try again. | |
136 } | |
137 } | |
138 | |
139 /* Atomically add an int to memory. */ | |
140 static inline int arm_add_and_fetch(volatile int *ptr, int add_value) { | |
141 for (;;) { | |
142 // Loop until a __kernel_cmpxchg succeeds. | |
143 | |
144 int prev = *ptr; | |
145 | |
146 if (__kernel_cmpxchg (prev, prev + add_value, ptr) == 0) | |
147 return prev + add_value; | |
148 } | |
149 } | |
150 | |
151 /* Atomically write VALUE into `*PTR' and returns the previous | |
152 contents of `*PTR'. */ | |
153 static inline int arm_lock_test_and_set(volatile int *ptr, int newval) { | |
154 for (;;) { | |
155 // Loop until a __kernel_cmpxchg succeeds. | |
156 int prev = *ptr; | |
157 | |
158 if (__kernel_cmpxchg (prev, newval, ptr) == 0) | |
159 return prev; | |
160 } | |
161 } | |
162 #endif // ARM | |
163 | |
164 inline void Atomic::store(jint store_value, volatile jint* dest) { | |
165 *dest = store_value; | |
166 } | |
167 | |
168 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { | |
169 *dest = store_value; | |
170 } | |
171 | |
172 inline jint Atomic::add(jint add_value, volatile jint* dest) { | |
173 #ifdef ARM | |
174 return arm_add_and_fetch(dest, add_value); | |
175 #else | |
176 #ifdef M68K | |
177 return m68k_add_and_fetch(dest, add_value); | |
178 #else | |
179 return __sync_add_and_fetch(dest, add_value); | |
180 #endif // M68K | |
181 #endif // ARM | |
182 } | |
183 | |
184 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { | |
185 #ifdef ARM | |
186 return arm_add_and_fetch(dest, add_value); | |
187 #else | |
188 #ifdef M68K | |
189 return m68k_add_and_fetch(dest, add_value); | |
190 #else | |
191 return __sync_add_and_fetch(dest, add_value); | |
192 #endif // M68K | |
193 #endif // ARM | |
194 } | |
195 | |
196 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { | |
197 return (void *) add_ptr(add_value, (volatile intptr_t *) dest); | |
198 } | |
199 | |
200 inline void Atomic::inc(volatile jint* dest) { | |
201 add(1, dest); | |
202 } | |
203 | |
204 inline void Atomic::inc_ptr(volatile intptr_t* dest) { | |
205 add_ptr(1, dest); | |
206 } | |
207 | |
208 inline void Atomic::inc_ptr(volatile void* dest) { | |
209 add_ptr(1, dest); | |
210 } | |
211 | |
212 inline void Atomic::dec(volatile jint* dest) { | |
213 add(-1, dest); | |
214 } | |
215 | |
216 inline void Atomic::dec_ptr(volatile intptr_t* dest) { | |
217 add_ptr(-1, dest); | |
218 } | |
219 | |
220 inline void Atomic::dec_ptr(volatile void* dest) { | |
221 add_ptr(-1, dest); | |
222 } | |
223 | |
224 inline jint Atomic::xchg(jint exchange_value, volatile jint* dest) { | |
225 #ifdef ARM | |
226 return arm_lock_test_and_set(dest, exchange_value); | |
227 #else | |
228 #ifdef M68K | |
229 return m68k_lock_test_and_set(dest, exchange_value); | |
230 #else | |
231 // __sync_lock_test_and_set is a bizarrely named atomic exchange | |
232 // operation. Note that some platforms only support this with the | |
233 // limitation that the only valid value to store is the immediate | |
234 // constant 1. There is a test for this in JNI_CreateJavaVM(). | |
235 return __sync_lock_test_and_set (dest, exchange_value); | |
236 #endif // M68K | |
237 #endif // ARM | |
238 } | |
239 | |
240 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, | |
241 volatile intptr_t* dest) { | |
242 #ifdef ARM | |
243 return arm_lock_test_and_set(dest, exchange_value); | |
244 #else | |
245 #ifdef M68K | |
246 return m68k_lock_test_and_set(dest, exchange_value); | |
247 #else | |
248 return __sync_lock_test_and_set (dest, exchange_value); | |
249 #endif // M68K | |
250 #endif // ARM | |
251 } | |
252 | |
253 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { | |
254 return (void *) xchg_ptr((intptr_t) exchange_value, | |
255 (volatile intptr_t*) dest); | |
256 } | |
257 | |
258 inline jint Atomic::cmpxchg(jint exchange_value, | |
259 volatile jint* dest, | |
260 jint compare_value) { | |
261 #ifdef ARM | |
262 return arm_compare_and_swap(dest, compare_value, exchange_value); | |
263 #else | |
264 #ifdef M68K | |
265 return m68k_compare_and_swap(dest, compare_value, exchange_value); | |
266 #else | |
267 return __sync_val_compare_and_swap(dest, compare_value, exchange_value); | |
268 #endif // M68K | |
269 #endif // ARM | |
270 } | |
271 | |
272 inline jlong Atomic::cmpxchg(jlong exchange_value, | |
273 volatile jlong* dest, | |
274 jlong compare_value) { | |
275 | |
276 return __sync_val_compare_and_swap(dest, compare_value, exchange_value); | |
277 } | |
278 | |
279 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, | |
280 volatile intptr_t* dest, | |
281 intptr_t compare_value) { | |
282 #ifdef ARM | |
283 return arm_compare_and_swap(dest, compare_value, exchange_value); | |
284 #else | |
285 #ifdef M68K | |
286 return m68k_compare_and_swap(dest, compare_value, exchange_value); | |
287 #else | |
288 return __sync_val_compare_and_swap(dest, compare_value, exchange_value); | |
289 #endif // M68K | |
290 #endif // ARM | |
291 } | |
292 | |
293 inline void* Atomic::cmpxchg_ptr(void* exchange_value, | |
294 volatile void* dest, | |
295 void* compare_value) { | |
296 | |
297 return (void *) cmpxchg_ptr((intptr_t) exchange_value, | |
298 (volatile intptr_t*) dest, | |
299 (intptr_t) compare_value); | |
300 } | |
1972 | 301 |
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302 inline jlong Atomic::load(volatile jlong* src) { |
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303 volatile jlong dest; |
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304 os::atomic_copy64(src, &dest); |
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305 return dest; |
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306 } |
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307 |
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308 inline void Atomic::store(jlong store_value, jlong* dest) { |
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309 os::atomic_copy64((volatile jlong*)&store_value, (volatile jlong*)dest); |
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310 } |
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311 |
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312 inline void Atomic::store(jlong store_value, volatile jlong* dest) { |
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313 os::atomic_copy64((volatile jlong*)&store_value, dest); |
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314 } |
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315 |
1972 | 316 #endif // OS_CPU_LINUX_ZERO_VM_ATOMIC_LINUX_ZERO_INLINE_HPP |