1 /* 2 * Copyright (c) 2000, 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 */ 24 25 #ifndef SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP 26 #define SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP 27 28 #include "memory/gcLocker.hpp" 29 30 inline bool GC_locker::is_active() { 31 return _lock_count > 0 || _jni_lock_count > 0; 32 } 33 34 inline bool GC_locker::check_active_before_gc() { 35 if (is_active()) { 36 set_needs_gc(); 37 } 38 return is_active(); 39 } 40 41 inline void GC_locker::lock() { 42 // cast away volatile 43 Atomic::inc(&_lock_count); 44 CHECK_UNHANDLED_OOPS_ONLY( 45 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; }) 46 assert(Universe::heap() == NULL || 47 !Universe::heap()->is_gc_active(), "locking failed"); 48 } 49 50 inline void GC_locker::unlock() { 51 // cast away volatile 52 Atomic::dec(&_lock_count); 53 CHECK_UNHANDLED_OOPS_ONLY( 54 if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; }) 55 } 56 57 inline void GC_locker::lock_critical(JavaThread* thread) { 58 if (!thread->in_critical()) { 59 if (!needs_gc()) { 60 jni_lock(); 61 } else { 62 jni_lock_slow(); 63 } 64 } 65 thread->enter_critical(); 66 } 67 68 inline void GC_locker::unlock_critical(JavaThread* thread) { 69 thread->exit_critical(); 70 if (!thread->in_critical()) { 71 if (!needs_gc()) { 72 jni_unlock(); 73 } else { 74 jni_unlock_slow(); 75 } 76 } 77 } 78 79 #endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP