Thu, 13 Jun 2013 22:02:40 -0700
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
Reviewed-by: dholmes, coleenp
Contributed-by: jeremymanson@google.com, calvin.cheung@oracle.com
1 /*
2 * Copyright (c) 2000, 2012, 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
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23 */
25 #ifndef SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP
26 #define SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP
28 #include "memory/gcLocker.hpp"
30 inline void GC_locker::lock() {
31 // cast away volatile
32 Atomic::inc(&_lock_count);
33 CHECK_UNHANDLED_OOPS_ONLY(
34 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; })
35 assert(Universe::heap() == NULL ||
36 !Universe::heap()->is_gc_active(), "locking failed");
37 }
39 inline void GC_locker::unlock() {
40 // cast away volatile
41 Atomic::dec(&_lock_count);
42 CHECK_UNHANDLED_OOPS_ONLY(
43 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; })
44 }
46 inline void GC_locker::lock_critical(JavaThread* thread) {
47 if (!thread->in_critical()) {
48 if (needs_gc()) {
49 // jni_lock call calls enter_critical under the lock so that the
50 // global lock count and per thread count are in agreement.
51 jni_lock(thread);
52 return;
53 }
54 increment_debug_jni_lock_count();
55 }
56 thread->enter_critical();
57 }
59 inline void GC_locker::unlock_critical(JavaThread* thread) {
60 if (thread->in_last_critical()) {
61 if (needs_gc()) {
62 // jni_unlock call calls exit_critical under the lock so that
63 // the global lock count and per thread count are in agreement.
64 jni_unlock(thread);
65 return;
66 }
67 decrement_debug_jni_lock_count();
68 }
69 thread->exit_critical();
70 }
72 #endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP