1 /*
2 * Copyright (c) 1997, 2013, 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 */
24
25 #include "precompiled.hpp"
26 #include "oops/oop.inline.hpp"
27 #include "utilities/accessFlags.hpp"
28 #ifdef TARGET_OS_FAMILY_linux
29 # include "os_linux.inline.hpp"
30 #endif
31 #ifdef TARGET_OS_FAMILY_solaris
32 # include "os_solaris.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_FAMILY_windows
35 # include "os_windows.inline.hpp"
36 #endif
37 #ifdef TARGET_OS_FAMILY_aix
38 # include "os_aix.inline.hpp"
39 #endif
40 #ifdef TARGET_OS_FAMILY_bsd
41 # include "os_bsd.inline.hpp"
42 #endif
43
44
45 void AccessFlags::atomic_set_bits(jint bits) {
46 // Atomically update the flags with the bits given
47 jint old_flags, new_flags, f;
48 do {
49 old_flags = _flags;
50 new_flags = old_flags | bits;
51 f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
52 } while(f != old_flags);
53 }
54
55 void AccessFlags::atomic_clear_bits(jint bits) {
56 // Atomically update the flags with the bits given
57 jint old_flags, new_flags, f;
58 do {
59 old_flags = _flags;
60 new_flags = old_flags & ~bits;
61 f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
62 } while(f != old_flags);
63 }
64
65 // Returns true iff this thread succeeded setting the bit.
66 bool AccessFlags::atomic_set_one_bit(jint bit) {
67 // Atomically update the flags with the bit given
68 jint old_flags, new_flags, f;
69 bool is_setting_bit = false;
70 do {
71 old_flags = _flags;
72 new_flags = old_flags | bit;
73 is_setting_bit = old_flags != new_flags;
74 f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
75 } while(f != old_flags);
76
77 return is_setting_bit;
78 }
79
80 #if !defined(PRODUCT) || INCLUDE_JVMTI
81
82 void AccessFlags::print_on(outputStream* st) const {
83 if (is_public ()) st->print("public " );
84 if (is_private ()) st->print("private " );
85 if (is_protected ()) st->print("protected " );
86 if (is_static ()) st->print("static " );
87 if (is_final ()) st->print("final " );
88 if (is_synchronized()) st->print("synchronized ");
89 if (is_volatile ()) st->print("volatile " );
90 if (is_transient ()) st->print("transient " );
91 if (is_native ()) st->print("native " );
92 if (is_interface ()) st->print("interface " );
93 if (is_abstract ()) st->print("abstract " );
94 if (is_strict ()) st->print("strict " );
95 if (is_synthetic ()) st->print("synthetic " );
96 if (is_old ()) st->print("{old} " );
97 if (is_obsolete ()) st->print("{obsolete} " );
98 if (on_stack ()) st->print("{on_stack} " );
99 }
100
101 #endif // !PRODUCT || INCLUDE_JVMTI
102
103 void accessFlags_init() {
104 assert(sizeof(AccessFlags) == sizeof(jint), "just checking size of flags");
105 }