Mercurial > hg > truffle
annotate src/share/vm/runtime/atomic.hpp @ 932:82bd76d4d7f2
6873800: enable compressed oops by default
Summary: enable compressed oops by default
Reviewed-by: never, ysr
author | kvn |
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date | Mon, 24 Aug 2009 11:13:46 -0700 |
parents | 665be97e8704 |
children | 89e0543e1737 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 class Atomic : AllStatic { | |
26 public: | |
27 // Atomically store to a location | |
28 static void store (jbyte store_value, jbyte* dest); | |
29 static void store (jshort store_value, jshort* dest); | |
30 static void store (jint store_value, jint* dest); | |
31 static void store (jlong store_value, jlong* dest); | |
32 static void store_ptr(intptr_t store_value, intptr_t* dest); | |
33 static void store_ptr(void* store_value, void* dest); | |
34 | |
35 static void store (jbyte store_value, volatile jbyte* dest); | |
36 static void store (jshort store_value, volatile jshort* dest); | |
37 static void store (jint store_value, volatile jint* dest); | |
38 static void store (jlong store_value, volatile jlong* dest); | |
39 static void store_ptr(intptr_t store_value, volatile intptr_t* dest); | |
40 static void store_ptr(void* store_value, volatile void* dest); | |
41 | |
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6863420: os::javaTimeNanos() go backward on Solaris x86
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42 static jlong load(volatile jlong* src); |
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6863420: os::javaTimeNanos() go backward on Solaris x86
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43 |
0 | 44 // Atomically add to a location, return updated value |
45 static jint add (jint add_value, volatile jint* dest); | |
46 static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest); | |
47 static void* add_ptr(intptr_t add_value, volatile void* dest); | |
48 | |
49 // Atomically increment location | |
50 static void inc (volatile jint* dest); | |
51 static void inc_ptr(volatile intptr_t* dest); | |
52 static void inc_ptr(volatile void* dest); | |
53 | |
54 // Atomically decrement a location | |
55 static void dec (volatile jint* dest); | |
56 static void dec_ptr(volatile intptr_t* dest); | |
57 static void dec_ptr(volatile void* dest); | |
58 | |
59 // Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest. | |
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60 static jint xchg(jint exchange_value, volatile jint* dest); |
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61 static unsigned int xchg(unsigned int exchange_value, |
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62 volatile unsigned int* dest); |
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63 |
0 | 64 static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest); |
65 static void* xchg_ptr(void* exchange_value, volatile void* dest); | |
66 | |
67 // Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value | |
68 // if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory | |
69 // barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'. | |
70 static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value); | |
71 static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value); | |
72 static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value); | |
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73 |
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74 static unsigned int cmpxchg(unsigned int exchange_value, |
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75 volatile unsigned int* dest, |
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76 unsigned int compare_value); |
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77 |
0 | 78 static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value); |
79 static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value); | |
80 }; |