1 /* 2 * Copyright (c) 2019, 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 #ifndef SHARE_GC_Z_ZSAFEDELETE_INLINE_HPP 25 #define SHARE_GC_Z_ZSAFEDELETE_INLINE_HPP 26 27 #include "gc/z/zArray.inline.hpp" 28 #include "gc/z/zSafeDelete.hpp" 29 #include "metaprogramming/isArray.hpp" 30 #include "utilities/debug.hpp" 31 32 template <typename T> 33 ZSafeDeleteImpl<T>::ZSafeDeleteImpl(ZLock* lock) : 34 _lock(lock), 35 _enabled(0), 36 _deferred() {} 37 38 template <typename T> 39 bool ZSafeDeleteImpl<T>::deferred_delete(ItemT* item) { 40 ZLocker<ZLock> locker(_lock); 41 if (_enabled > 0) { 42 _deferred.add(item); 43 return true; 44 } 45 46 return false; 47 } 48 49 template <typename T> 50 void ZSafeDeleteImpl<T>::immediate_delete(ItemT* item) { 51 if (IsArray<T>::value) { 52 delete [] item; 53 } else { 54 delete item; 55 } 56 } 57 58 template <typename T> 59 void ZSafeDeleteImpl<T>::enable_deferred_delete() { 60 ZLocker<ZLock> locker(_lock); 61 _enabled++; 62 } 63 64 template <typename T> 65 void ZSafeDeleteImpl<T>::disable_deferred_delete() { 66 ZArray<ItemT*> deferred; 67 68 { 69 ZLocker<ZLock> locker(_lock); 70 assert(_enabled > 0, "Invalid state"); 71 if (--_enabled == 0) { 72 deferred.transfer(&_deferred); 73 } 74 } 75 76 ZArrayIterator<ItemT*> iter(&deferred); 77 for (ItemT* item; iter.next(&item);) { 78 immediate_delete(item); 79 } 80 } 81 82 template <typename T> 83 void ZSafeDeleteImpl<T>::operator()(ItemT* item) { 84 if (!deferred_delete(item)) { 85 immediate_delete(item); 86 } 87 } 88 89 template <typename T> 90 ZSafeDelete<T>::ZSafeDelete() : 91 ZSafeDeleteImpl<T>(&_lock), 92 _lock() {} 93 94 template <typename T> 95 ZSafeDeleteNoLock<T>::ZSafeDeleteNoLock() : 96 ZSafeDeleteImpl<T>(NULL) {} 97 98 #endif // SHARE_GC_Z_ZSAFEDELETE_INLINE_HPP