Thu, 13 Oct 2011 09:35:42 -0700
7098194: integrate macosx-port changes
Summary: Integrate bsd-port/hotspot and macosx-port/hotspot changes as of 2011.09.29.
Reviewed-by: kvn, dholmes, never, phh
Contributed-by: Christos Zoulas <christos@zoulas.com>, Greg Lewis <glewis@eyesbeyond.com>, Kurt Miller <kurt@intricatesoftware.com>, Alexander Strange <astrange@apple.com>, Mike Swingler <swingler@apple.com>, Roger Hoover <rhoover@apple.com>, Victor Hernandez <vhernandez@apple.com>, Pratik Solanki <psolanki@apple.com>
1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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_FAMILY_bsd
37 # include "os_bsd.inline.hpp"
38 #endif
39 #ifdef TARGET_OS_ARCH_linux_x86
40 # include "atomic_linux_x86.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_ARCH_linux_sparc
43 # include "atomic_linux_sparc.inline.hpp"
44 #endif
45 #ifdef TARGET_OS_ARCH_linux_zero
46 # include "atomic_linux_zero.inline.hpp"
47 #endif
48 #ifdef TARGET_OS_ARCH_solaris_x86
49 # include "atomic_solaris_x86.inline.hpp"
50 #endif
51 #ifdef TARGET_OS_ARCH_solaris_sparc
52 # include "atomic_solaris_sparc.inline.hpp"
53 #endif
54 #ifdef TARGET_OS_ARCH_windows_x86
55 # include "atomic_windows_x86.inline.hpp"
56 #endif
57 #ifdef TARGET_OS_ARCH_linux_arm
58 # include "atomic_linux_arm.inline.hpp"
59 #endif
60 #ifdef TARGET_OS_ARCH_linux_ppc
61 # include "atomic_linux_ppc.inline.hpp"
62 #endif
63 #ifdef TARGET_OS_ARCH_bsd_x86
64 # include "atomic_bsd_x86.inline.hpp"
65 #endif
66 #ifdef TARGET_OS_ARCH_bsd_zero
67 # include "atomic_bsd_zero.inline.hpp"
68 #endif
70 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) {
71 assert(sizeof(jbyte) == 1, "assumption.");
72 uintptr_t dest_addr = (uintptr_t)dest;
73 uintptr_t offset = dest_addr % sizeof(jint);
74 volatile jint* dest_int = (volatile jint*)(dest_addr - offset);
75 jint cur = *dest_int;
76 jbyte* cur_as_bytes = (jbyte*)(&cur);
77 jint new_val = cur;
78 jbyte* new_val_as_bytes = (jbyte*)(&new_val);
79 new_val_as_bytes[offset] = exchange_value;
80 while (cur_as_bytes[offset] == compare_value) {
81 jint res = cmpxchg(new_val, dest_int, cur);
82 if (res == cur) break;
83 cur = res;
84 new_val = cur;
85 new_val_as_bytes[offset] = exchange_value;
86 }
87 return cur_as_bytes[offset];
88 }
90 unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) {
91 assert(sizeof(unsigned int) == sizeof(jint), "more work to do");
92 return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest);
93 }
95 unsigned Atomic::cmpxchg(unsigned int exchange_value,
96 volatile unsigned int* dest, unsigned int compare_value) {
97 assert(sizeof(unsigned int) == sizeof(jint), "more work to do");
98 return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest,
99 (jint)compare_value);
100 }
102 jlong Atomic::add(jlong add_value, volatile jlong* dest) {
103 jlong old = load(dest);
104 jlong new_value = old + add_value;
105 while (old != cmpxchg(new_value, dest, old)) {
106 old = load(dest);
107 new_value = old + add_value;
108 }
109 return old;
110 }