/* * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "jfr/support/jfrThreadLocal.hpp" #include "jfr/utilities/jfrThreadIterator.hpp" #include "runtime/thread.inline.hpp" static bool thread_inclusion_predicate(Thread* t) { assert(t != NULL, "invariant"); return !t->jfr_thread_local()->is_dead(); } static bool java_thread_inclusion_predicate(JavaThread* jt, bool live_only) { assert(jt != NULL, "invariant"); if (live_only && jt->thread_state() == _thread_new) { return false; } return thread_inclusion_predicate(jt); } static JavaThread* next_java_thread(JavaThreadIteratorWithHandle& iter, bool live_only) { JavaThread* next = iter.next(); while (next != NULL && !java_thread_inclusion_predicate(next, live_only)) { next = iter.next(); } return next; } static NonJavaThread* next_non_java_thread(NonJavaThread::Iterator& iter) { while (!iter.end()) { NonJavaThread* next = iter.current(); iter.step(); assert(next != NULL, "invariant"); if (thread_inclusion_predicate(next)) { return next; } } return NULL; } JfrJavaThreadIteratorAdapter::JfrJavaThreadIteratorAdapter(bool live_only /* true */) : _iter(), _next(next_java_thread(_iter, live_only)), _live_only(live_only) {} JavaThread* JfrJavaThreadIteratorAdapter::next() { assert(has_next(), "invariant"); Type* const temp = _next; _next = next_java_thread(_iter, _live_only); assert(temp != _next, "invariant"); return temp; } JfrNonJavaThreadIteratorAdapter::JfrNonJavaThreadIteratorAdapter(bool live_only /* true */) : _iter(), _next(next_non_java_thread(_iter)) {} bool JfrNonJavaThreadIteratorAdapter::has_next() const { return _next != NULL; } NonJavaThread* JfrNonJavaThreadIteratorAdapter::next() { assert(has_next(), "invariant"); Type* const temp = _next; _next = next_non_java_thread(_iter); assert(temp != _next, "invariant"); return temp; } // explicit instantiations template class JfrThreadIterator<JfrJavaThreadIteratorAdapter, StackObj>; template class JfrThreadIterator<JfrNonJavaThreadIteratorAdapter, StackObj>;