| /* |
| * Copyright (c) 2017, 2018, 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. |
| */ |
| |
| #ifndef SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |
| #define SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |
| |
| #include "gc/z/zBitField.hpp" |
| #include "memory/allocation.hpp" |
| |
| // |
| // Allocation flags layout |
| // ----------------------- |
| // |
| // 7 3 2 1 0 |
| // +----+-+-+-+-+ |
| // |0000|1|1|1|1| |
| // +----+-+-+-+-+ |
| // | | | | | |
| // | | | | * 0-0 Worker Thread Flag (1-bit) |
| // | | | | |
| // | | | * 1-1 Non-Blocking Flag (1-bit) |
| // | | | |
| // | | * 2-2 Relocation Flag (1-bit) |
| // | | |
| // | * 3-3 No Reserve Flag (1-bit) |
| // | |
| // * 7-4 Unused (4-bits) |
| // |
| |
| class ZAllocationFlags { |
| private: |
| typedef ZBitField<uint8_t, bool, 0, 1> field_worker_thread; |
| typedef ZBitField<uint8_t, bool, 1, 1> field_non_blocking; |
| typedef ZBitField<uint8_t, bool, 2, 1> field_relocation; |
| typedef ZBitField<uint8_t, bool, 3, 1> field_no_reserve; |
| |
| uint8_t _flags; |
| |
| public: |
| ZAllocationFlags() : |
| _flags(0) {} |
| |
| void set_worker_thread() { |
| _flags |= field_worker_thread::encode(true); |
| } |
| |
| void set_non_blocking() { |
| _flags |= field_non_blocking::encode(true); |
| } |
| |
| void set_relocation() { |
| _flags |= field_relocation::encode(true); |
| } |
| |
| void set_no_reserve() { |
| _flags |= field_no_reserve::encode(true); |
| } |
| |
| bool worker_thread() const { |
| return field_worker_thread::decode(_flags); |
| } |
| |
| bool non_blocking() const { |
| return field_non_blocking::decode(_flags); |
| } |
| |
| bool relocation() const { |
| return field_relocation::decode(_flags); |
| } |
| |
| bool no_reserve() const { |
| return field_no_reserve::decode(_flags); |
| } |
| }; |
| |
| #endif // SHARE_GC_Z_ZALLOCATIONFLAGS_HPP |