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 #include "precompiled.hpp" 25 #include "gc/z/zThread.hpp" 26 #include "runtime/thread.hpp" 27 #include "utilities/debug.hpp" 28 29 __thread bool ZThread::_initialized; 30 __thread uintptr_t ZThread::_id; 31 __thread bool ZThread::_is_vm; 32 __thread bool ZThread::_is_java; 33 __thread bool ZThread::_is_worker; 34 __thread uint ZThread::_worker_id; 35 36 void ZThread::initialize() { 37 assert(!_initialized, "Already initialized"); 38 const Thread* const thread = Thread::current(); 39 _initialized = true; 40 _id = (uintptr_t)thread; 41 _is_vm = thread->is_VM_thread(); 42 _is_java = thread->is_Java_thread(); 43 _is_worker = thread->is_Worker_thread(); 44 _worker_id = (uint)-1; 45 } 46 47 const char* ZThread::name() { 48 const Thread* const thread = Thread::current(); 49 if (thread->is_Named_thread()) { 50 const NamedThread* const named = (const NamedThread*)thread; 51 return named->name(); 52 } else if (thread->is_Java_thread()) { 53 return "Java"; 54 } 55 56 return "Unknown"; 57 } 58 59 bool ZThread::has_worker_id() { 60 return _initialized && 61 _is_worker && 62 _worker_id != (uint)-1; 63 } 64 65 void ZThread::set_worker_id(uint worker_id) { 66 ensure_initialized(); 67 assert(!has_worker_id(), "Worker id already initialized"); 68 _worker_id = worker_id; 69 } 70 71 void ZThread::clear_worker_id() { 72 assert(has_worker_id(), "Worker id not initialized"); 73 _worker_id = (uint)-1; 74 }