Mercurial > hg > truffle
comparison src/share/vm/memory/gcLocker.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2000-2005 Sun Microsystems, Inc. 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 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 inline bool GC_locker::is_active() { | |
26 return _lock_count > 0 || _jni_lock_count > 0; | |
27 } | |
28 | |
29 inline bool GC_locker::check_active_before_gc() { | |
30 if (is_active()) { | |
31 set_needs_gc(); | |
32 } | |
33 return is_active(); | |
34 } | |
35 | |
36 inline void GC_locker::lock() { | |
37 // cast away volatile | |
38 Atomic::inc(&_lock_count); | |
39 CHECK_UNHANDLED_OOPS_ONLY( | |
40 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; }) | |
41 assert(Universe::heap() == NULL || | |
42 !Universe::heap()->is_gc_active(), "locking failed"); | |
43 } | |
44 | |
45 inline void GC_locker::unlock() { | |
46 // cast away volatile | |
47 Atomic::dec(&_lock_count); | |
48 CHECK_UNHANDLED_OOPS_ONLY( | |
49 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; }) | |
50 } | |
51 | |
52 inline void GC_locker::lock_critical(JavaThread* thread) { | |
53 if (!thread->in_critical()) { | |
54 if (!needs_gc()) { | |
55 jni_lock(); | |
56 } else { | |
57 jni_lock_slow(); | |
58 } | |
59 } | |
60 thread->enter_critical(); | |
61 } | |
62 | |
63 inline void GC_locker::unlock_critical(JavaThread* thread) { | |
64 thread->exit_critical(); | |
65 if (!thread->in_critical()) { | |
66 if (!needs_gc()) { | |
67 jni_unlock(); | |
68 } else { | |
69 jni_unlock_slow(); | |
70 } | |
71 } | |
72 } |