Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/satbQueue.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | d4197f8d516a |
| children | 6e0aac35bfa9 |
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| 342 | 1 /* |
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2 * Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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 * | |
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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. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 25 class ObjectClosure; | |
| 26 class JavaThread; | |
| 27 | |
| 28 // A ptrQueue whose elements are "oops", pointers to object heads. | |
| 29 class ObjPtrQueue: public PtrQueue { | |
| 30 public: | |
| 31 ObjPtrQueue(PtrQueueSet* qset_, bool perm = false) : | |
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32 PtrQueue(qset_, perm, qset_->is_active()) { } |
| 342 | 33 // Apply the closure to all elements, and reset the index to make the |
| 34 // buffer empty. | |
| 35 void apply_closure(ObjectClosure* cl); | |
| 36 | |
| 37 // Apply the closure to all elements of "buf", down to "index" (inclusive.) | |
| 38 static void apply_closure_to_buffer(ObjectClosure* cl, | |
| 39 void** buf, size_t index, size_t sz); | |
| 40 | |
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41 void verify_oops_in_buffer() NOT_DEBUG_RETURN; |
| 342 | 42 }; |
| 43 | |
| 44 | |
| 45 | |
| 46 class SATBMarkQueueSet: public PtrQueueSet { | |
| 47 ObjectClosure* _closure; | |
| 48 ObjectClosure** _par_closures; // One per ParGCThread. | |
| 49 | |
| 50 ObjPtrQueue _shared_satb_queue; | |
| 51 | |
| 52 // Utility function to support sequential and parallel versions. If | |
| 53 // "par" is true, then "worker" is the par thread id; if "false", worker | |
| 54 // is ignored. | |
| 55 bool apply_closure_to_completed_buffer_work(bool par, int worker); | |
| 56 | |
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57 #ifdef ASSERT |
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58 void dump_active_values(JavaThread* first, bool expected_active); |
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59 #endif // ASSERT |
| 342 | 60 |
| 61 public: | |
| 62 SATBMarkQueueSet(); | |
| 63 | |
| 64 void initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
| 1111 | 65 int process_completed_threshold, |
| 66 Mutex* lock); | |
| 342 | 67 |
| 68 static void handle_zero_index_for_thread(JavaThread* t); | |
| 69 | |
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70 // Apply "set_active(b)" to all Java threads' SATB queues. It should be |
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71 // called only with the world stopped. The method will assert that the |
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72 // SATB queues of all threads it visits, as well as the SATB queue |
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73 // set itself, has an active value same as expected_active. |
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74 void set_active_all_threads(bool b, bool expected_active); |
| 342 | 75 |
| 76 // Register "blk" as "the closure" for all queues. Only one such closure | |
| 77 // is allowed. The "apply_closure_to_completed_buffer" method will apply | |
| 78 // this closure to a completed buffer, and "iterate_closure_all_threads" | |
| 79 // applies it to partially-filled buffers (the latter should only be done | |
| 80 // with the world stopped). | |
| 81 void set_closure(ObjectClosure* closure); | |
| 82 // Set the parallel closures: pointer is an array of pointers to | |
| 83 // closures, one for each parallel GC thread. | |
| 84 void set_par_closure(int i, ObjectClosure* closure); | |
| 85 | |
| 86 // If there is a registered closure for buffers, apply it to all entries | |
| 87 // in all currently-active buffers. This should only be applied at a | |
| 88 // safepoint. (Currently must not be called in parallel; this should | |
| 89 // change in the future.) | |
| 90 void iterate_closure_all_threads(); | |
| 91 // Parallel version of the above. | |
| 92 void par_iterate_closure_all_threads(int worker); | |
| 93 | |
| 94 // If there exists some completed buffer, pop it, then apply the | |
| 95 // registered closure to all its elements, and return true. If no | |
| 96 // completed buffers exist, return false. | |
| 97 bool apply_closure_to_completed_buffer() { | |
| 98 return apply_closure_to_completed_buffer_work(false, 0); | |
| 99 } | |
| 100 // Parallel version of the above. | |
| 101 bool par_apply_closure_to_completed_buffer(int worker) { | |
| 102 return apply_closure_to_completed_buffer_work(true, worker); | |
| 103 } | |
| 104 | |
| 105 ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; } | |
| 106 | |
| 107 // If a marking is being abandoned, reset any unprocessed log buffers. | |
| 108 void abandon_partial_marking(); | |
| 109 | |
| 110 }; |