1 2 /* 3 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef SHARE_SERVICES_THREADIDTABLE_HPP 27 #define SHARE_SERVICES_THREADIDTABLE_HPP 28 29 #include "memory/allocation.hpp" 30 31 class JavaThread; 32 class ThreadsList; 33 class ThreadIdTableConfig; 34 35 class ThreadIdTable : public AllStatic { 36 friend class ThreadIdTableConfig; 37 38 static volatile bool _is_initialized; 39 40 public: 41 // Initialization 42 static void lazy_initialize(const ThreadsList* threads); is_initialized()43 static bool is_initialized() { return _is_initialized; } 44 45 // Lookup and list management 46 static JavaThread* find_thread_by_tid(jlong tid); 47 static JavaThread* add_thread(jlong tid, JavaThread* thread); 48 static bool remove_thread(jlong tid); 49 50 private: 51 static void create_table(size_t size); 52 53 static size_t table_size(); 54 static double get_load_factor(); 55 static void grow_if_required(); 56 static void grow(JavaThread* jt); 57 58 static void item_added(); 59 static void item_removed(); 60 }; 61 62 #endif // SHARE_SERVICES_THREADIDTABLE_HPP 63