97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
/*
|
|
* 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
|