1 /*
2 * Copyright (c) 2018, 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
25 #ifndef SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP
26 #define SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP
27
28 #include "gc/shared/oopStorage.inline.hpp"
29 #include "gc/shared/oopStorageParState.hpp"
30 #include "metaprogramming/conditional.hpp"
31 #include "utilities/macros.hpp"
32
33 template<typename F>
34 class OopStorage::BasicParState::AlwaysTrueFn {
35 F _f;
36
37 public:
AlwaysTrueFn(F f)38 AlwaysTrueFn(F f) : _f(f) {}
39
40 template<typename OopPtr> // [const] oop*
operator ()(OopPtr ptr) const41 bool operator()(OopPtr ptr) const { _f(ptr); return true; }
42 };
43
44 struct OopStorage::BasicParState::IterationData {
45 size_t _segment_start;
46 size_t _segment_end;
47 size_t _processed;
48 };
49
50 template<bool is_const, typename F>
iterate(F f)51 inline void OopStorage::BasicParState::iterate(F f) {
52 // Wrap f in ATF so we can use Block::iterate.
53 AlwaysTrueFn<F> atf_f(f);
54 IterationData data = {}; // zero initialize.
55 while (claim_next_segment(&data)) {
56 assert(data._segment_start < data._segment_end, "invariant");
57 assert(data._segment_end <= _block_count, "invariant");
58 typedef typename Conditional<is_const, const Block*, Block*>::type BlockPtr;
59 size_t i = data._segment_start;
60 do {
61 BlockPtr block = _active_array->at(i);
62 block->iterate(atf_f);
63 } while (++i < data._segment_end);
64 }
65 }
66
67 template<bool concurrent, bool is_const>
68 template<typename F>
iterate(F f)69 inline void OopStorage::ParState<concurrent, is_const>::iterate(F f) {
70 _basic_state.template iterate<is_const>(f);
71 }
72
73 template<bool concurrent, bool is_const>
74 template<typename Closure>
oops_do(Closure * cl)75 inline void OopStorage::ParState<concurrent, is_const>::oops_do(Closure* cl) {
76 this->iterate(oop_fn(cl));
77 }
78
79 template<typename F>
iterate(F f)80 inline void OopStorage::ParState<false, false>::iterate(F f) {
81 _basic_state.template iterate<false>(f);
82 }
83
84 template<typename Closure>
oops_do(Closure * cl)85 inline void OopStorage::ParState<false, false>::oops_do(Closure* cl) {
86 this->iterate(oop_fn(cl));
87 }
88
89 template<typename Closure>
weak_oops_do(Closure * cl)90 inline void OopStorage::ParState<false, false>::weak_oops_do(Closure* cl) {
91 this->iterate(skip_null_fn(oop_fn(cl)));
92 }
93
94 template<typename IsAliveClosure, typename Closure>
weak_oops_do(IsAliveClosure * is_alive,Closure * cl)95 inline void OopStorage::ParState<false, false>::weak_oops_do(IsAliveClosure* is_alive, Closure* cl) {
96 this->iterate(if_alive_fn(is_alive, oop_fn(cl)));
97 }
98
99 #endif // SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP
100