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1 /* |
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2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "jfr/support/jfrThreadLocal.hpp" |
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27 #include "jfr/utilities/jfrThreadIterator.hpp" |
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28 #include "runtime/thread.inline.hpp" |
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29 |
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30 static bool thread_inclusion_predicate(Thread* t) { |
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31 assert(t != NULL, "invariant"); |
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32 return !t->jfr_thread_local()->is_dead(); |
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33 } |
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34 |
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35 static bool java_thread_inclusion_predicate(JavaThread* jt) { |
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36 assert(jt != NULL, "invariant"); |
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37 return thread_inclusion_predicate(jt) && jt->thread_state() != _thread_new; |
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38 } |
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39 |
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40 static JavaThread* next_java_thread(JavaThreadIteratorWithHandle& iter) { |
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41 JavaThread* next = iter.next(); |
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42 while (next != NULL && !java_thread_inclusion_predicate(next)) { |
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43 next = iter.next(); |
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44 } |
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45 return next; |
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46 } |
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47 |
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48 static NonJavaThread* next_non_java_thread(NonJavaThread::Iterator& iter) { |
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49 NonJavaThread* next = NULL; |
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50 while (!iter.end()) { |
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51 next = iter.current(); |
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52 iter.step(); |
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53 assert(next != NULL, "invariant"); |
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54 if (!thread_inclusion_predicate(next)) { |
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55 continue; |
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56 } |
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57 } |
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58 return next; |
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59 } |
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60 |
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61 JfrJavaThreadIteratorAdapter::JfrJavaThreadIteratorAdapter() : _iter(), _next(next_java_thread(_iter)) {} |
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62 |
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63 JavaThread* JfrJavaThreadIteratorAdapter::next() { |
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64 assert(has_next(), "invariant"); |
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65 Type* const temp = _next; |
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66 _next = next_java_thread(_iter); |
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67 assert(temp != _next, "invariant"); |
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68 return temp; |
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69 } |
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70 |
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71 JfrNonJavaThreadIteratorAdapter::JfrNonJavaThreadIteratorAdapter() : _iter(), _next(next_non_java_thread(_iter)) {} |
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72 |
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73 bool JfrNonJavaThreadIteratorAdapter::has_next() const { |
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74 return _next != NULL; |
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75 } |
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76 |
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77 NonJavaThread* JfrNonJavaThreadIteratorAdapter::next() { |
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78 assert(has_next(), "invariant"); |
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79 Type* const temp = _next; |
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80 _next = next_non_java_thread(_iter); |
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81 assert(temp != _next, "invariant"); |
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82 return temp; |
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83 } |
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84 |
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85 // explicit instantiations |
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86 template class JfrThreadIterator<JfrJavaThreadIteratorAdapter, StackObj>; |
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87 template class JfrThreadIterator<JfrNonJavaThreadIteratorAdapter, StackObj>; |