Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/atomic.hpp @ 3767:2a241e764894
6941923: RFE: Handling large log files produced by long running Java Applications
Summary: supply optinal flags to realize gc log rotation
Reviewed-by: ysr, jwilhelm
| author | minqi |
|---|---|
| date | Fri, 10 Jun 2011 15:08:36 -0700 |
| parents | f95d63e2154a |
| children | cd3d6a6b95d9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_ATOMIC_HPP |
| 26 #define SHARE_VM_RUNTIME_ATOMIC_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 | |
| 0 | 30 class Atomic : AllStatic { |
| 31 public: | |
| 32 // Atomically store to a location | |
| 33 static void store (jbyte store_value, jbyte* dest); | |
| 34 static void store (jshort store_value, jshort* dest); | |
| 35 static void store (jint store_value, jint* dest); | |
| 36 static void store (jlong store_value, jlong* dest); | |
| 37 static void store_ptr(intptr_t store_value, intptr_t* dest); | |
| 38 static void store_ptr(void* store_value, void* dest); | |
| 39 | |
| 40 static void store (jbyte store_value, volatile jbyte* dest); | |
| 41 static void store (jshort store_value, volatile jshort* dest); | |
| 42 static void store (jint store_value, volatile jint* dest); | |
| 43 static void store (jlong store_value, volatile jlong* dest); | |
| 44 static void store_ptr(intptr_t store_value, volatile intptr_t* dest); | |
| 45 static void store_ptr(void* store_value, volatile void* dest); | |
| 46 | |
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47 static jlong load(volatile jlong* src); |
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48 |
| 0 | 49 // Atomically add to a location, return updated value |
| 50 static jint add (jint add_value, volatile jint* dest); | |
| 51 static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest); | |
| 52 static void* add_ptr(intptr_t add_value, volatile void* dest); | |
| 53 | |
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54 static jlong add (jlong add_value, volatile jlong* dest); |
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55 |
| 0 | 56 // Atomically increment location |
| 57 static void inc (volatile jint* dest); | |
| 58 static void inc_ptr(volatile intptr_t* dest); | |
| 59 static void inc_ptr(volatile void* dest); | |
| 60 | |
| 61 // Atomically decrement a location | |
| 62 static void dec (volatile jint* dest); | |
| 63 static void dec_ptr(volatile intptr_t* dest); | |
| 64 static void dec_ptr(volatile void* dest); | |
| 65 | |
| 66 // Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest. | |
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67 static jint xchg(jint exchange_value, volatile jint* dest); |
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68 static unsigned int xchg(unsigned int exchange_value, |
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69 volatile unsigned int* dest); |
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70 |
| 0 | 71 static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest); |
| 72 static void* xchg_ptr(void* exchange_value, volatile void* dest); | |
| 73 | |
| 74 // Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value | |
| 75 // if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory | |
| 76 // barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'. | |
| 77 static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value); | |
| 78 static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value); | |
| 79 static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value); | |
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80 |
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81 static unsigned int cmpxchg(unsigned int exchange_value, |
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82 volatile unsigned int* dest, |
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83 unsigned int compare_value); |
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84 |
| 0 | 85 static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value); |
| 86 static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value); | |
| 87 }; | |
| 1972 | 88 |
| 89 #endif // SHARE_VM_RUNTIME_ATOMIC_HPP |