|
1 /* |
|
2 * Copyright (c) 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 #ifndef SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |
|
25 #define SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |
|
26 |
|
27 #include "gc/z/zBitField.hpp" |
|
28 #include "memory/allocation.hpp" |
|
29 |
|
30 // |
|
31 // Allocation flags layout |
|
32 // ----------------------- |
|
33 // |
|
34 // 7 4 3 2 1 0 |
|
35 // +---+-+-+-+-+-+ |
|
36 // |000|1|1|1|1|1| |
|
37 // +---+-+-+-+-+-+ |
|
38 // | | | | | | |
|
39 // | | | | | * 0-0 Java Thread Flag (1-bit) |
|
40 // | | | | | |
|
41 // | | | | * 1-1 Worker Thread Flag (1-bit) |
|
42 // | | | | |
|
43 // | | | * 2-2 Non-Blocking Flag (1-bit) |
|
44 // | | | |
|
45 // | | * 3-3 Relocation Flag (1-bit) |
|
46 // | | |
|
47 // | * 4-4 No Reserve Flag (1-bit) |
|
48 // | |
|
49 // * 7-5 Unused (3-bits) |
|
50 // |
|
51 |
|
52 class ZAllocationFlags { |
|
53 private: |
|
54 typedef ZBitField<uint8_t, bool, 0, 1> field_java_thread; |
|
55 typedef ZBitField<uint8_t, bool, 1, 1> field_worker_thread; |
|
56 typedef ZBitField<uint8_t, bool, 2, 1> field_non_blocking; |
|
57 typedef ZBitField<uint8_t, bool, 3, 1> field_relocation; |
|
58 typedef ZBitField<uint8_t, bool, 4, 1> field_no_reserve; |
|
59 |
|
60 uint8_t _flags; |
|
61 |
|
62 public: |
|
63 ZAllocationFlags() : |
|
64 _flags(0) {} |
|
65 |
|
66 void set_java_thread() { |
|
67 _flags |= field_java_thread::encode(true); |
|
68 } |
|
69 |
|
70 void set_worker_thread() { |
|
71 _flags |= field_worker_thread::encode(true); |
|
72 } |
|
73 |
|
74 void set_non_blocking() { |
|
75 _flags |= field_non_blocking::encode(true); |
|
76 } |
|
77 |
|
78 void set_relocation() { |
|
79 _flags |= field_relocation::encode(true); |
|
80 } |
|
81 |
|
82 void set_no_reserve() { |
|
83 _flags |= field_no_reserve::encode(true); |
|
84 } |
|
85 |
|
86 bool java_thread() const { |
|
87 return field_java_thread::decode(_flags); |
|
88 } |
|
89 |
|
90 bool worker_thread() const { |
|
91 return field_worker_thread::decode(_flags); |
|
92 } |
|
93 |
|
94 bool non_blocking() const { |
|
95 return field_non_blocking::decode(_flags); |
|
96 } |
|
97 |
|
98 bool relocation() const { |
|
99 return field_relocation::decode(_flags); |
|
100 } |
|
101 |
|
102 bool no_reserve() const { |
|
103 return field_no_reserve::decode(_flags); |
|
104 } |
|
105 }; |
|
106 |
|
107 #endif // SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |