Mercurial > hg > graal-compiler
annotate src/share/vm/memory/gcLocker.inline.hpp @ 4867:1a2723f7ad8e
7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
Reviewed-by: kvn, iveresov, dholmes
| author | never |
|---|---|
| date | Sun, 29 Jan 2012 16:46:04 -0800 |
| parents | f95d63e2154a |
| children | ad3b47344802 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP |
| 26 #define SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP | |
| 27 | |
| 28 #include "memory/gcLocker.hpp" | |
| 29 | |
| 0 | 30 inline bool GC_locker::is_active() { |
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31 assert(_needs_gc || SafepointSynchronize::is_at_safepoint(), "only read at safepoint"); |
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32 verify_critical_count(); |
| 0 | 33 return _lock_count > 0 || _jni_lock_count > 0; |
| 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()) { | |
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54 if (needs_gc()) { |
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55 // jni_lock call calls enter_critical under the lock so that the |
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56 // global lock count and per thread count are in agreement. |
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57 jni_lock(thread); |
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58 return; |
| 0 | 59 } |
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60 increment_debug_jni_lock_count(); |
| 0 | 61 } |
| 62 thread->enter_critical(); | |
| 63 } | |
| 64 | |
| 65 inline void GC_locker::unlock_critical(JavaThread* thread) { | |
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66 if (thread->in_last_critical()) { |
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67 if (needs_gc()) { |
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68 // jni_unlock call calls exit_critical under the lock so that |
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69 // the global lock count and per thread count are in agreement. |
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70 jni_unlock(thread); |
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71 return; |
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72 } |
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73 decrement_debug_jni_lock_count(); |
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74 } |
| 0 | 75 thread->exit_critical(); |
| 76 } | |
| 1972 | 77 |
| 78 #endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP |