Mercurial > hg > truffle
annotate src/share/vm/runtime/atomic.cpp @ 2442:c2323e2ea62b
6385687: UseFastEmptyMethods/UseFastAccessorMethods considered harmful
Reviewed-by: kvn, jrose, phh
author | never |
---|---|
date | Thu, 31 Mar 2011 21:05:55 -0700 |
parents | f95d63e2154a |
children | 2a241e764894 |
rev | line source |
---|---|
0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "runtime/atomic.hpp" | |
27 #ifdef TARGET_OS_FAMILY_linux | |
28 # include "os_linux.inline.hpp" | |
29 #endif | |
30 #ifdef TARGET_OS_FAMILY_solaris | |
31 # include "os_solaris.inline.hpp" | |
32 #endif | |
33 #ifdef TARGET_OS_FAMILY_windows | |
34 # include "os_windows.inline.hpp" | |
35 #endif | |
36 #ifdef TARGET_OS_ARCH_linux_x86 | |
37 # include "atomic_linux_x86.inline.hpp" | |
38 #endif | |
39 #ifdef TARGET_OS_ARCH_linux_sparc | |
40 # include "atomic_linux_sparc.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_ARCH_linux_zero | |
43 # include "atomic_linux_zero.inline.hpp" | |
44 #endif | |
45 #ifdef TARGET_OS_ARCH_solaris_x86 | |
46 # include "atomic_solaris_x86.inline.hpp" | |
47 #endif | |
48 #ifdef TARGET_OS_ARCH_solaris_sparc | |
49 # include "atomic_solaris_sparc.inline.hpp" | |
50 #endif | |
51 #ifdef TARGET_OS_ARCH_windows_x86 | |
52 # include "atomic_windows_x86.inline.hpp" | |
53 #endif | |
0 | 54 |
55 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { | |
56 assert(sizeof(jbyte) == 1, "assumption."); | |
57 uintptr_t dest_addr = (uintptr_t)dest; | |
58 uintptr_t offset = dest_addr % sizeof(jint); | |
59 volatile jint* dest_int = (volatile jint*)(dest_addr - offset); | |
60 jint cur = *dest_int; | |
61 jbyte* cur_as_bytes = (jbyte*)(&cur); | |
62 jint new_val = cur; | |
63 jbyte* new_val_as_bytes = (jbyte*)(&new_val); | |
64 new_val_as_bytes[offset] = exchange_value; | |
65 while (cur_as_bytes[offset] == compare_value) { | |
66 jint res = cmpxchg(new_val, dest_int, cur); | |
67 if (res == cur) break; | |
68 cur = res; | |
69 new_val = cur; | |
70 new_val_as_bytes[offset] = exchange_value; | |
71 } | |
72 return cur_as_bytes[offset]; | |
73 } | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
74 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
75 unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
76 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
77 return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
78 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
79 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
80 unsigned Atomic::cmpxchg(unsigned int exchange_value, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
81 volatile unsigned int* dest, unsigned int compare_value) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
82 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
83 return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
84 (jint)compare_value); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
85 } |