1 /* 2 * Copyright (c) 2015, 2017, 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_ZTHREAD_HPP 25 #define SHARE_GC_Z_ZTHREAD_HPP 26 27 #include "memory/allocation.hpp" 28 #include "utilities/debug.hpp" 29 30 class ZThread : public AllStatic { 31 friend class ZTask; 32 33 private: 34 static __thread bool _initialized; 35 static __thread uintptr_t _id; 36 static __thread bool _is_vm; 37 static __thread bool _is_java; 38 static __thread bool _is_worker; 39 static __thread uint _worker_id; 40 41 static void initialize(); 42 43 static void ensure_initialized() { 44 if (!_initialized) { 45 initialize(); 46 } 47 } 48 49 static bool has_worker_id(); 50 static void set_worker_id(uint worker_id); 51 static void clear_worker_id(); 52 53 public: 54 static const char* name(); 55 56 static uintptr_t id() { 57 ensure_initialized(); 58 return _id; 59 } 60 61 static bool is_vm() { 62 ensure_initialized(); 63 return _is_vm; 64 } 65 66 static bool is_java() { 67 ensure_initialized(); 68 return _is_java; 69 } 70 71 static bool is_worker() { 72 ensure_initialized(); 73 return _is_worker; 74 } 75 76 static uint worker_id() { 77 assert(has_worker_id(), "Worker id not initialized"); 78 return _worker_id; 79 } 80 }; 81 82 #endif // SHARE_GC_Z_ZTHREAD_HPP